AR-600 Operators Manual Jan 2005

NIDEK CO., LTD. (Manufacturer) NIDEK CO., LTD (Tokyo Office)

NIDEK INCORPORATED (United States Agent) NIDEK SOCIETE ANONYME (Authorized Representative)

: 34-14, Maehama, Hiroishi-cho, Gamagori, Aichi 443-0038, Japan Telephone: (0533) 67-6611 Facsimile: (0533) 67-6610 : 6th Floor, Takahashi Bldg., No.2, 3-chome, Kanda-jinboucho Chiyoda-ku, Tokyo 101-0051, Japan Telephone: (03) 3288-0571 Facsimile: (03) 3288-0570 Telex: 2226647 NIDEK J : 47651 Westinghouse Drive, Fremont, California 94539, U. S. A. Telephone: (510) 226-5700 Facsimile: (510) 226-5750 : Europarc 13, rue Auguste Perret, 94042 CRETEIL, France Telephone: (01) 49 80 97 97 Facsimile: (01) 49 80 32 08 2005. 1 32906-P902O Printed in JAPAN

BEFORE USE OR MAINTENANCE, READ THIS MANUAL. This Operator’s Manual contains information necessary for the operation of the NIDEK AUTO REFRACTOMETER Model AR-600. This manual includes the operating procedures, safety precautions, specifications, and information about accessories and maintenance. The device complies with ISO 10342 (Ophthalmic devices—Eye Refractometers). IEC 60601-1 and UL 60601-1 standards are applied in this manual. The dioptric powers are indicated with a reference of wavelength λd = 587.56 nm. This manual is necessary for proper use. Especially, the safety precautions and operating procedures must be thoroughly understood prior to operation of the device. Keep this manual handy for reference. There are no user-serviceable parts inside the device except printer paper and fuses. Therefore, if you encounter any problems or have questions about the device, please contact NIDEK or your authorized distributor.

MEDICAL ELECTRICAL EQUIPMENT 34VK UL60601-1 CAN/CSA C22.2 NO. 601.1 WITH RESPECT TO ELECTRICAL SHOCK, FIRE AND MECHANICAL HAZARDS ONLY IN ACCORDANCE WITH UL6060l-1 AND CAN/CSA C22.2 NO. 601.1

(This applies to products whose power source is 100/120 Vac.)

Table of Contents

§1 INTRODUCTION ...Page 1-1 1.1Outline of the Product ... 1-1 1.2 Indications for Use ... 1-1 1.3 Classifications ... 1-1 1.4 Symbol Information ... 1-2

§2 SAFETY... 2-1 2.1 Operation ... 2-1 2.2 Storage ... 2-2 2.3 Transportation... 2-3 2.4 Installation ... 2-3 2.5 Wiring ... 2-5 2.6 After Use ... 2-5 2.7 Maintenance and Checks ... 2-9 2.8 Disposal ... 2-9 2.9 Labels ... 2-10

§3 CONFIGURATION ... 3-1 §4 OPERATING PROCEDURES ... 4-1 4.1 Operation Flow ... 4-1 4.2 Preparation for Measurement ... 4-1 4.3 AR (refractive error) Measurement ... 4-6 4.4 PD (Pupillary Distance) Measurement ... 4-8

§5 PRINTOUT ... 5-1 5.1 Printing Measurement Results ... 5-1 5.2 Eyeprint ... 5-4

§6 OTHER FUNCTIONS ... 6-1 6.1 System Setup ... 6-1 6.2 Setting Date and Time ... 6-8 6.3 Entering Comments ... 6-9

§7 TROUBLESHOOTING ... 7-1

§8 MAINTENANCE ...Page 8-1 8.1 Replacing the Printer Paper ... 8-1 8.2 Setting a Stack of Chinrest Paper ... 8-3 8.3 Replacing Fuses... 8-4 8.4 Cleaning the Measuring Window ... 8-6 8.5 Cleaning the Exterior ... 8-7 8.6 List of Replacement Parts ... 8-7

§9 IC CARD SYSTEM (OPTIONAL) ... 9-1 §10SPECIFICATIONS ... 10-1 §11 ACCESSORIES... 11-1 11.1 Standard Accessories ... 11-1 11.2 Optional Accessories ... 11-1

§12EMC (ELECTROMAGNETIC COMPATIBILITY) ... 12-1 APPENDIX A. GLOSSARY ... A-1 INDEX ... End of this manual

[This page is intentionally left blank.]

§1 INTRODUCTION 1.1 Outline of the Product The NIDEK AR-600 is an auto refractometer which objectively measures refractive errors of sphere, cylinder, and axis for the lens that corrects the patient’s vision into emmetropia. Weak infrared rays are used for the measurement. This device has a main body and a measuring unit integrated on one base. On the base are a chin rest on the patient’s side and a printer on the operator’s side which outputs measured results. On the main body is a TV monitor, a control panel, and a joystick, which are used to make alignment and perform operations. The measuring unit has a measuring window into which the patient looks and where the infrared ray radiates on the patient’s eye.

1.2 Indications for Use The Model AR-600 Auto Refractometer is a diagnostic device that is indicated for use in the automated measurement of refractive errors of the eye.

1.3 Classifications [Form of protection against electric shock] Class I The AR-600 is classified as a Class I device. A Class I is a device in which the protection against electric shock does not rely on basic insulation only, but which includes an additional safety precaution in such a way that means are provided for the connection of the device to the protective (ground) conductor in the fixed wiring of the installation in such a way that accessible metal parts cannot become live in the event of a failure in the basic insulation. Use a power outlet which is equipped with a grounding terminal. [Degree of protection against electric shock] Type B Applied Part The AR-600 is classified as a device with a Type B Applied Part. A Type B Applied Part provides a particular degree of protection against electric shock, particularly regarding the following: - allowable leakage currents - reliability of the protective earth connection (if present) [Degree of protection against ingress of liquids] IP 20 The AR-600 is classified as IP20*1. The AR-600 is an ordinary device, as such does not provide protection with respect to harmful effects due to the ingress of water although it is protected against access to hazardous parts with a solid matter such as a finger of 12.5 mm in diameter. Avoid exposing water to the device. *1 In accordance with IEC 60529

1-2 [Degree of protection against flammability] The AR-600 is classified as a device not suitable to be used in a potentially flammable environment. Do not use near flammable materials. [Method(s) of sterilization or disinfection recommended by the manufacturer] The forehead rest and chinrest should be wiped using a cloth dampened with alcohol as necessary. [Mode of operation] Classification of the AR-600: continuous operation

1.4 Symbol Information This symbol indicates that important descriptions are contained in the operator’s manual and that the operator must refer to the operator’s manual prior to operation or maintenance. This symbol indicates that the degree of protection against electric shock is of a Type B Applied Part. This symbol of the power switch indicates that when the switch is pressed to this symbol side, power is supplied to the device. This symbol of the power switch indicates that when the switch is pressed to this symbol side, power is not supplied to the device. This symbol indicates the fuse rating. This symbol indicates the input port. This symbol indicates the output port. This indicates that the device must be supplied only with alternating current. This indicates the knob for adjusting the contrast. This indicates the knob for adjusting the brightness.

§2 SAFETY In this manual, a signal word is used to designate the degree or level of safety alerting. The definition is as follows: CAUTION:

Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury or property damage accident.

Even situations indicated by CAUTION may result in serious injury under certain conditions. Safety precautions must be strictly followed at all times.

2.1 Operation CAUTION • Never disassemble nor touch the inside of the device. This may result in electric shock or device malfunction. • Do not hold the power cord, but hold the mains plug to disconnect it from an outlet. A break in the internal wiring of the cord may result in short circuit or electric shock. • Never put a heavy object on the power cord nor catch the cord between any objects. The cover of the cord may become worn and may cause fire or electric shock. • If the metal core of the power cord is exposed, power turns on and off by shaking the cord, or the cord/plug gets so heated that one cannot hold it, it means that the cord is damaged. Exchange the cord immediately. This may cause electric shock or fire. • Do not use the device for other than the intended purpose. NIDEK will not be responsible for accidents or malfunctions caused by such carelessness. • Wipe between the prongs of the mains plug with a dry cloth every once in a while. If dust settles between the prongs, the dust easily takes up moisture, and it may cause short circuit and fire. • The measured values of objective refractive power obtained by the AR-600 are intended to be used as a reference for lens prescription for the correction of visual acuity with spectacle or contact lenses. Manifest refraction must be used as the basis for spectacle or contact lens prescription.

2-2

CAUTION • In advance of measurement of each patient, wipe the forehead rest and chinrest with a clean cloth. Moreover, remove one piece of chinrest paper for each patient if a stack of the chinrest paper is fixed to the chinrest. If necessary, wipe the forehead rest and chinrest using a cloth dampened with rubbing alcohol. • In the event a failure occurs in the device, do not touch the inside of the device, but remove the power cord from the outlet and contact your authorized distributor. • Keep fingerprints and dust off of the measuring window. The measurement accuracy may deteriorate substantially. • In advance of a measurement of each patient, wipe the forehead rest and chinrest with a clean cloth. Moreover, remove one chinrest paper for each patient if a bunch of the chinrest paper is fixed to the chinrest. If necessary, wipe the forehead rest and chinrest using a cloth dampened with rubbing alcohol. • In the event a failure occurs in the device, do not touch the inside of the device, but remove the power cord from the outlet and contact your authorized distributor. • Keep fingerprints and dust off of the measuring window. The measurement accuracy may deteriorate substantially.

2.2 Storage CAUTION • Do not store the device in a place where it may get wet or where poisonous gas or liquid is stored. • Avoid storing the device in an area with excessive heat, humidity, or dust. To preserve the appearance and internal parts of the device, avoid direct exposure to sunlight.

2-3

2.3 Transportation CAUTION • Do not drag the device by its cord or cable. This may cause injury or device damage. • To carry the device, hold it from the side with both your hands on its base. (Do not ever hold the forehead rest to lift up the device.) This may result in injury or device damage. • To transport the device to another location, store the device in a shipping carton or the optional carrying case. In such cases, never lock the main body with the locking knob. Breakdown of the device may result.

2.4 Installation CAUTION • Before connecting the power cord or interface cable, provide a stable, level, and open space. Since receptacles are under the base unit, the device may fall and may cause injury or device malfunction. • Do not install the device near water. If water gets into the internal structure, there is the possibility of electric shock or device malfunction. • Install the device in a stable and level place where vibration or shock does not occur. The device may not perform measurement correctly or may malfunction. Also, if the device falls because of any accidental shock, it may result in injury. • Install the device in the following conditions. A dust free environment A light interference free environment A vibration and shock free environment • Install the device in a place where temperature and humidity can be maintained under the following conditions. Temperature: 10 - 40ºC Humidity: 30 - 75% (non-condensing)

2-4

CAUTION • This device has been tested and found to comply with the limits for medical devices to the IEC 60601-1-2: 1993, EN60601-1-2: 1994 and Medical Device Directive 93/42/EEC. These limits are designed to provide reasonable protection against harmful interference in a typical medical installation. This device generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to other devices in the vicinity. However, there is no guarantee that interference will not occur in a particular installation. If this device does cause harmful interference to other devices, which can be determined by turning the device off and on, the user is encouraged to try to correct the interference by one of the following measures: - Reorient or relocate the receiving device - Increase the separation between the device. - Connect the device into an outlet on a circuit different from that to which the other device (s) are connected. - Consult the manufacturer or field service technician for help. • In installation and operation of the device, observe the following instructions about EMC (electromagnetic compatibility): - Do not use the device simultaneously with other electronic equipment to avoid electromagnetic interference with the operation of the device. - Do not use the device near, on, or under other electronic equipment to avoid electromagnetic interference with the operation of the device. - Do not use the device in the same room with other equipment such as life-support equipment, other equipment that has major affects on the life of the patient and results of treatment, or other measurement or treatment equipment that involves small electric current. - Do not use the device simultaneously with portable and mobile radio frequency communication systems because it may have an adverse effect on operation of the device. - Do not use cables and accessories that are not specified for the device because that may increase the emission of electromagnetic waves from the device or the system and decrease the immunity of the device to electromagnetic disturbance. • The Electromagnetic Compatibility Directive sets the essential requirements for electrical and electronic equipment that may disturb, or be disturbed by, other equipment. The AR600 complies with these requirements as tabled on pages 12-1 to 12-3. Follow the guidance in the tables for use of the device in an electromagnetic environment.

2-5

2.5 Wiring CAUTION • Be sure to use a power outlet which meets the power specification requirements. If the line voltage is too high or too low, the device may not give full performance. Malfunction or fire may also occur. • Be sure to use a (HOSPITAL GRADE) wall outlet equipped with a grounding terminal in order to avoid electric shock or fire in the event of power leakage. • Insert the mains plug into a grounded outlet. Breakdown of the device, power leakage, electric shock or fire may result. • Securely connect the mains plug into an outlet. Insecure connection may result in fire.

2.6 After Use CAUTION • If the device will not be used for a long time, disconnect the power cord from the wall outlet. This may cause fire. • When the device is not in use, turn off the power switch and place a cover over the device. If the device is not covered, dust may accumulate and affect measurement accuracy.

2-6

CAUTION • Information on the avoidance of overexposure to potentially hazardous optical radiation (ISO 15004: 1997) Spectrally weighted photochemical radiances LB and LA give a measure of the potential that exists for a beam of light to cause photochemical hazard to the retina. LB gives the measure for eyes in which the crystalline lens is in place. LA gives this measure either for eyes in which the crystalline lens has been removed (aphakes) and has not been replaced by a UV-blocking lens or for the eyes of very young children. The value stated for this ophthalmic device gives a measure of hazard potential when the device is operated at maximum intensity and maximum aperture. The values of LA or LB for the AR-600 are sufficiently low as shown on the following page. The retinal exposure dose for a photochemical hazard is a product of the radiance and the exposure time. For instance, at a radiance level of 1 mW/(cm2•sr), 240 min irradiation of the dilated (8 mm diameter) pupil would cause the retinal exposure dose level to attain the recommended exposure limit. If the value of radiance were reduced to 0.1 mW/(cm2•sr), ten times that time (i.e. 2400 min) would be needed to reach the recommended limit. The recommended exposure dose is based on calculations arising from the American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Values for Chemical Substances and Physical Agents (1995 - 1996 edition). The following page shows the graph of spectrum output for the AR-600. Patients will be at low risk of acute optical radiation with the AR-600. However, it is recommended that the intensity of light directed into the patient’s eye be limited to the minimum level which is necessary for diagnosis. The total of the retinal exposure dose must be carefully watched for infants, aphakes and persons with diseased eyes who are at greater risk when other ophthalmic devices with a high level of radiance are used in conjunction.

2-7

CAUTION Spectrum output of all light source during AR measurement (maximum light intensity) AR-630A 7

放射照度：(μW/c㎡) Irradiance:

6 5 4 3 2 1 0 300

400

500

600

700

800

900

Wavelength: 波長：(nm)

Spectrum irradiance A

2

1.158

B

2

0.106

L (µW/cm /sr) 380 - 700 nm L (µW/cm /sr) 305 - 700 nm

*1 *2

LA: Spectrally weighted photochemical aphakic source radiance LB: Spectrally weighted photochemical phakic source radiance

1000

2-8 { Patient environment The patient environment represents a space where there is a possibility of direct contact between the patient or the operator and third person. When another type of device is used in the patient environment, use a device that complies with IEC 60601-1. If the devices that do not comply with IEC 60601-1 are used, it is necessary to use an isolating transformer to power the device or to connect the devices to additional protective grounding.

Radius of 1.5 m

2.5 m

1.5 m

1.5 m

2-9

2.7 Maintenance and Checks CAUTION • Replace the fuses with the specified fuses only. A fire may result. • If disassembling is necessary to repair the device, be sure to ask your authorized distributor for servicing. • Never use an organic solvent such as paint thinner to wipe the exterior. This may ruin the surface. • When the device is sent back to NIDEK for repair or maintenance, wipe the surface (especially the area where the patient’s skin contacts) of the device with a clean cloth immersed in ethyl alcohol for disinfection. • Contact NIDEK or your authorized distributor to check whether the device needs measurement accuracy calibration if the AR-measured results are largely different from the subjective measurements.

2.8 Disposal NOTE • Follow local governing ordinances and recycling plans regarding disposal or recycling of device components. The device contains the circuit board with the lithium battery. Because the disposal method of lithium batteries varies according to the government, follow the local governing ordinates and recycling plans when disposing of the circuit board with the lithium battery. • When disposing of packing materials, sort them by material and follow local governing ordinances and recycling plans.

2 - 10

2.9 Labels The following labels provide safety information about each part.

or

(Only marketed for NIDEK INCORPORATED)

or

or

2 - 11

§3 CONFIGURATION If optionally ordered:

IC Card System

Measuring Unit Knob TV Monitor Start Button Joystick Memory Indicator Print Button Changing Button IOL Button

Display Panel Cover for Switches Locking knob Printer

Power Switch

3-2 IC Card System (Optional) If the optional IC card system was ordered, the IC card Reader/Writer should be factorybuilt into this part. TV Monitor Displays the patient’s eye, Target, measurement results, and Alignment light projected onto the patient’s eye. The R (right) or L (left) indicator shows the eye to be measured as well as the eye of the measurement result on the display. Display Panel Displays measurement results. The indicator of R (right) or L (left) shows the measuring eye side as well as the eye side of the measurement result on the display. Cover for Switches Inside, there are two switches for setting measuring conditions, a switch for printing “Eyeprint”, and also knobs for adjusting the contrast and brightness of the TV monitor display. Locking Knob Used to fix the main body to the base unit. To lock the main body, bring the main body to the center of the base unit, and turn the knob counterclockwise while pressing it down. To temporarily lock the body at any position, turn the knob clockwise. Do not lock the main body with this locking knob during transport. Otherwise, breakdown of the device may result.

IOL Button Should be pressed to turn on the IOL mode when measuring an IOL-implanted eye or an eye with a Contact Lens (CL). If such an eye is measured without turning on the IOL mode, an error may appear and measurement may not be completed. Also used for system parameter and date & time settings. Changing Button Used to change between AR (refractive error) measurement and PD (Pupillary Distance) measurement. Also, used to change system parameter settings, date & time settings, and the character code for comments. Print Button Prints the measurement result if pressed after measurement. Memory Indicator While the measurement result is in memory, this will be illuminated. It goes out when the result is printed out and the next measurement is starting. Joystick Used to move the main body right, left, back and forth. Start Button Used to start the AR (refractive error) measurement or PD (pupillary distance) measurement. Also used to change the item number of system parameters. Measuring Unit Knob Moves the measuring unit up and down by turning this.

3-3

Min. Pupil Marker

Cylinder Mode Indication

%;.㧙 Target

Measurement count indication

㧜

Alignment Light

Indications on the TV monitor during measurement

Contrast Control Brightness Control

Setting Switch

Eyeprint Switch

CYL Mode Changing Switch

Auxiliary Switches

3-4 Min. Pupil Marker Indicates the minimum pupil size measurable. The device may not perform measurement when the pupil is smaller than this marker or eyelashes are within this marker. Cylinder Mode Indication Indicates the current cylinder mode. Target Used as a guide to place the patient’s eye in the center of the TV monitor. Alignment Light Should be in focus and be placed in the target at measurement. Contrast Control Used to adjust the contrast of the TV monitor. Brightness Control Used to adjust the brightness of the TV monitor. Setting Switch Used when setting system parameters, setting date and time, and writing comments. Eyeprint Switch Prints only the basic results and an eyeprint, which graphically shows the refractive status of the eye, by pressing it after measurement. The eyeprint will be printed out regardless of the settings in the system parameters. Also, used to select one of the parameter setting modes or the date & time setting mode.

CYL Mode Changing Switch Changes the cylinder mode, the reading direction of cylinder data. + mode ... Cylinder data will be indicated by a + reading. - mode ... Cylinder data will be indicated by a - reading. MIX mode .. Cylinder data will be indicated by a + reading when the refractive error is positive for any meridian. In other cases, cylinder data will be indicated by a reading. • The cylinder mode can be changed even after measurement. • Data will be printed out with the mode status at the time of printout.

3-5

Forehead Rest

Measuring Window

Eye Level Marker

LED for Corneal Illumination Chinrest PD Window Chinrest Knob

From-the-top view

V Control of TV Monitor H Control of TV Monitor

Underside view

Fuses Power Inlet

Interface Connectors

3-6 Measuring Window Patient looks at the chart through this window. Eye Level Marker A guide for the patient’s eye level for measurement. The height of the chinrest should be adjusted so that the center of the patient’s eye almost aligns with this line. Chinrest Knob Moves the chinrest up and down by turning this. You may use the eye level marker as a guide to adjust the patient’s eye level to a comfortable height for measurement. Fuses Be sure to use the specified ones. Power Inlet The attached power cord is to be connected here.

Interface Connectors*1 side: Connect the interface cable to transfer measured results to an external computer etc. side: Connect the interface cable from the lensmeter to import measured results from the lensmeter. If the AR-600 is equipped with an IC card system, the connector on the side can not be used. By connecting the Lensmeter to the side of the interface connectors and the refractor RT2100/RT-1200 to the side, the LM (Lensmeter) data can be transmitted to the refractor via the AR.*2 By pressing the print button on the Lensmeter, the data transmission will be started.

H Control of TV Monitor Adjusted with a screwdriver when the display does not lock horizontally. Can be found under the main body. V Control of TV Monitor Adjusted with a screwdriver when the display does not lock vertically. Can be found under the main body.

*1 Accessory equipment connected to the analog and digital interfaces must be certified according to the representative appropriate national standards (for example, UL 1950 for Data Processing Equipment UL 60601-1 for Medical Equipment, and CSA C22.2 No. 601-1, EN 60601-1 and IEC 60601-1.) Furthermore, all configurations shall comply with the system standard IEC 60601-1. Anyone who connects additional equipment to the signal input part or signal output part configurs a medical system, and is therefore responsible that the system complies with the requirements of the system standard IEC 60601-1. If in doubt, consult the technical service department or your local representative. *2 When communicating with the Lensmeter, set communication parameters for each device as follows. For the setting procedure, see the Operator’s Manual of each device. • AR-600 • NIDEK Lensmeter 28: Baud-Rate = 9600 RS-232C = NIDEK 29: Bit Length = 8 Baud-Rate = 9600 Parity = Odd Data Bits = 8 Stop Bits = 1

§4 OPERATING PROCEDURES 4.1 Operation Flow Power ON 4.2 Preparation for Measurement

(p. 4-1)

Measurements → 4.3 AR (refractive error) Measurement (p. 4-6) → 4.4 PD (Pupillary Distance) Measurement (p. 4-8) 5. PRINTOUT

(p. 5-1)

Power OFF

(Determine the final prescription by subjective refraction.)

4.2 Preparation for Measurement 1. Turn on the power switch. The display panel indicates as shown below. On the TV monitor, you will see the target and Min. pupil marker in the center, the Cylinder mode indication in the top right, and measuring count in the bottom left.

Target Min. Pupil Marker Cylinder mode indication

%;.㧙

㧜

NOTE

Measuring count

• “ERR” appears on the TV monitor if the power is turned ON on condition that the printer paper is not set in the printer housing. To delete “ERR”, set the printer paper and turn the power on again.

4-2

NOTE • If “< PD ERR >” is on the left side of the TV monitor, the device may not recognize left and right (measurement may not be %;.㧙 performed binocularly), and also PD ‫ޛ‬2&'44‫ޜ‬ (pupillary distance) may not be measured. Check the PD window. If the PD window is covered by anything, remove it. If covered by dust, wipe lightly with a swab 㧜 with a little alcohol to clean it. If “<PD ERR>” is indicated on the monitor even after performing the corrections described above, install the device in a low light interference environment since the error may have occurred due to the light interference.

2. Open the cover for switches and set measurement conditions. The cover can be opened by sliding it to the left. a. Using : Perform system setup. As to the procedure, see “6. OTHER FUNCTIONS”. b. Using : Set the cylinder mode, indication of the cylinder reading direction. CYL + ... Indicates cylindrical power by a + reading. CYL - ... Indicates cylindrical power by a - reading. CYL ± ... Indicates the cylindrical power by a + reading when the refractive error is positive for any meridian. Indicates the cylindrical power by a - reading in other cases. * The cylinder mode can be changed even after measurement. * Data will be printed out with the mode status at the time of printout.

4-3 3. If you are measuring an IOL-implanted eye or an eye with a Contact Lens (CL), turn on the IOL mode by pressing . The IOL ON mark appears in the top left of the TV monitor. IOL ON Mark

+1.

%;.㧙

㧜

NOTE • When measuring an IOL-implanted eye or an eye with a Contact Lens (CL), the IOL mode should be turned on. If such an eye is measured without turning on the IOL mode, an error message may appear and measurement may not be completed. • The IOL mode automatically turns off by sliding the main body or after printout. • The IOL mode automatically turns on when measurement error has occurred three times in a row. (Auto IOL*1)

*1 < Auto IOL > The on/off of the Auto IOL function can be changed in the system parameter. As to the changing procedure, see “6.1 System Setup”.

4-4 4. Prepare the patient. 1) Clean the forehead rest and chinrest with clean gauze. If a stack of chinrest paper is fixed to the chinrest, remove one piece of paper. 2) Instruct the patient to take off his/her glasses or contact lenses and to have a seat. 3) Instruct the patient to place his/her chin on the chinrest and to rest his or her forehead on the forehead rest.

4) Adjust the height of the chinrest by turning the chinrest knob until the center of the patient’s eye aligns with the eye level marker.

NOTE • To relax the patient, explain as follows before measurement. “This device measures your eye with infrared rays to find which kind of lens fits you. The infrared ray does no harm to your eyes.”

5. Perform alignment and focusing. 1) Instruct the patient to: “Look through the measuring window. As you will see a picture of a balloon, look at the center of it without straining.”

4-5 2) Manipulate the joystick to place the patient’s eye onto the TV monitor. By moving the joystick laterally, the main body moves right, left , back and forth. By turning the measuring unit knob, the measuring unit moves up and down. Align the eye position to the measuring point with right, left, up and down movements. Adjust the focus with back and forth movements.

NOTE • If the alignment light is not in the center of the pupil and the Min. pupil marker is on the iris, bring the Min. pupil marker into the center of the pupil, ignoring the alignment light, to perform measurement.

3) Manipulate the joystick to place the alignment light in the center of the target. 4) Move the joystick back and forth to focus the alignment light until it becomes its smallest.

㧯㨅㧸㧙

Target

Alignment Light

㧾

Min. Pupil Marker

㧿㧼㧴 㧯㨅㧸 㧜 㧗 㧜㧚㧜㧜 㧙㧜㧚㧜㧜

㧭㨄 㧜

NOTE • When the patient’s eyelid or eyelashes are wtihin the Min. Pupil Marker, measurement may not be correct. In such a case, instruct the patient to open the eye wider. If his/her eye is not open wider enough, open it with your hand while taking care not to press the patient’s eyeball.

4-6

4.3 AR (refractive error) Measurement 1. Perform measurement. Press the start button.

NOTE • Instruct the patient not to blink during measurement.

You will hear a short beep, and the alignment light will stop blinking.

The patient’s view will be fogged.

AR measurement will take place. You will hear a long beep, and the measurement count will be shown on the bottom left of the TV monitor.

%;.㧙 ‫(ޛ‬+0+5*‫ޜ‬

NOTE • The serial AR measurement takes place while the start button is held down. (Highspeed mode*1)

㧟

When the median value is obtained, measurement is completed. “<FINISH>” appears on the left side of the TV monitor. The measured results on the TV monitor are always the latest ones (AI mode *2) *1 < Highspeed mode > This mode, when the start button is held down in AR measurement, enables the fogging function to be maintained throughout the serial measurement. As to the procedure of disabling or reactivating the Highspeed mode, see “6.1 System Setup”. *2 < AI mode > This is the mode in which the device completes measurement as soon as the median value is obtained. But if “Error Data” of the parameter is set to “YES” and there are not any variations in the three measurements, measurement ends. If there is erroneous data (confidence coefficient=E) in the measurements, the median value is not obtained. To activate the AI mode, the AI Mode parameter should be set to “YES” (see “6.1 System Setup”).

4-7

NOTE • The device can memorize up to 10 measurements each for the right and left eyes. If the measurements exceed 10, older data will be cleared in turn. • If the AI Mode parameter is set to “NO”, take about three shots for AR measurement. If the measurement result is not stable, take some additional shots. • If you want to repeat measurement several times without printing, set the Print parameter to “Manu.”. By pressing the start button, “< FINISH >” disappears and serial measurement starts again.

2. Measure the other eye in the same manner.

NOTE • When an error or erroneous data*3 appears, the cause may be one of those mentioned below. If one of the signs appear again after repeating measurement, check the following: a. Patient blinked during measurement. b. The eyelid or eyelashes are within the Min. pupil marker. c. The patient’s pupil is smaller than the Min. pupil marker. (Let the patient sit in a dark room for a while and wait until the pupil diameter becomes large enough for measurement.) d. Retinal reflection is extremely low due to an optical disease such as a cataract. e. There is some unusual reflection on the cornea during measurement. (In this case, measurement may not be performed unless the IOL mode is on.) f. There is extreme distortion of the cornea.

*3 < Erroneous data > Data that the confidence index of AR measurement is “E” (see “6.1 System Setup”).

4-8

4.4 PD (Pupillary Distance) Measurement A. Auto-PD measurement (When the Auto-PD parameter is set to “YES”) The PD measurement will have been completed when AR measurement is finished.

NOTE • The PD measurement will not be on the display but will be printed out together with AR results.

B. Manual PD measurement (When the Auto-PD parameter is set to “NO”): 1. Press . The display for PD measurement appears on the display panel as follows.

2. Instruct the patient not to move his/her head or eyes during measurement. 3. After careful alignment and focusing for the right and left eyes, press the start button each time.

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