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POSITIONING THE PATIENT

In the initial status after power on, the mode is set to the auto start.

  • Make sure of the measurement screen.
  • Press AUTO START SWITCH on the control panel and display the alignment bar in the monitor screen.

SETTING THE MEASUREMENT MODE

This instrument can change the measurement mode R/K (REF-KRT continuous measure- ment, KRT, REF).

In the initial status after power on, the measurement mode is R/K.

  • Make sure of the measurement screen.
  • Press MEASUREMENT MODE SWITCH of the control panel and set the measurement mode.

COLLIMATION AND MEASUREMENT (ADJUSTING THE PATIENT’S EYE TO AUTO REFRACTOMETER)

Alignment operations are done with the control lever.

NOTE: Movement operations of the main body using the control lever.

  • The main body position can be fine-adjusted laterally by inclining the control lever to each direction.

  •  The main body position can be fine-adjusted vertically by turning the control lever right (up) and left (down).

1. Hold the control lever and move the main body to the operator side.

2. Operate the control lever laterally and vertically to obtain the target eye in the center of monitor screen.

3. While moving the main body toward the patient, focus the target eye. A vague, reflected luminous point for alignment appears on the cornea.

4. Fine-adjust the main body position in all directions so that the luminous point comes within the alignment mark.

5. Keeping the luminous point within the alignment mark, slowly move the main body toward the patient. When the main body approaches the target eye, the alignment bar of the monitor screen changes to arrows.

NOTE: Take care so that eyelashes and eyelid do not come into the minimum pupil diameter mark as they may disturb measurement.

NOTE: If the instrument is too close to the alignment reference position <- -> is displayed on the monitor screen, and if too close -><- is displayed.

6. After the alignment bar is displayed, move the main body slowly towards the patient. Measurement is done and the measurement value is displayed on the monitor screen.

  • To stop auto start
    Press the MEASUREMENT SWITCH, and release it after hearing the buzzer sounds twice. Auto measurement is stopped. To return to auto measurement, press the AUTO START SWITCH again.
    After stopping the measurement, the measurement result is printed out by pressing the PRINT SWITCH.
  • To automatically print the measurement result (available at auto start mode only)If YES is selected for auto print in the initial setting, press the MEASUREMENT SWITCH after right and left measurements are finished.The buzzer sounds twice, and the measurement result is printed out automatically.

NOTE: If measurement is not possible under auto start mode (this may occur when the cornea condition is not good), measure under manual start mode.

DISPLAYING MEASUREMENT VALUES

Data of the latest measurement are displayed on the monitor screen.

Figures only: Measurement was done correctly.

ERROR: Measurement was not done correctly.

In the initial status after power on, the mode is set to the auto start.

  • Check the measurement screen.
  • Press AUTO START SWITCH on the control panel and erase the alignment bar in the monitor screen.

COLLIMATION AND MEASUREMENT

Alignment operations are done with the control lever.

1. Operate the control lever laterally and vertically so as to obtain the target eye in the center of monitor screen.

2. While moving the main body toward the patient, focus the target eye. A vague, reflected luminous point for alignment appears on the cornea. Focus the target eye to make the luminous point minimum.

3. Fine-adjust the main body position in all directions so that the luminous point comes within the alignment mark.

4. When the luminous point becomes the minimum within the alignment mark, press the MEASUREMENT SWITCH.

NOTE: Even when collimation is improper, measurement is done by pressing the MEASUREMENT SWITCH, but to secure high-precision values, do collimation properly.

5. Measurement is done and measurement values are displayed.

For the measurement of cornea diameter, “C.D MEMORY YES” (measurement of static image) or “C.D MEMORY NO” (measurement of dynamic image) can be selected in the initial setting.

MEASURING THE DYNAMIC IMAGE

1. Focus the target eye.

 

2. Press the CORNEA DIAMETER SWITCH.

3. Observe of the cornea diameter screen.

4. Bring the left positioning bar to the left end of iris by pressing the AUTO START SWITCH (for moving left) and TARGET IMAGE SWITCH (for moving right).

5. Press the MEASUREMENT SWITCH.
6.  The guide mark moves right.
7.  Bring the right positioning bar to the right end of iris by pressing the AUTO START SWITCH (for moving left) and TARGET IMAGE SWITCH (for moving right).
NOTE: If it is necessary to move the left positioning bar again, press the MEASUREMENT MODE SWITCH. When the MEASUREMENT MODE SWITCH is pressed further, right and left positioning bars return to the initial positions.
8.  Press the MEASUREMENT SWITCH.
9.  The cornea diameter is displayed.
10. Press the MEASUREMENT SWITCH. The measurement mode of left eye sets in. Measure also the right eye in like manner.

11. After displaying data for both eyes, press the MEASUREMENT SWITCH to return to the measurement screen.

NOTE:

To get out of the mode during measurement, press the PRINT SWITCH.

When the measurement result is necessary for one eye only, do the measurement and then press the PRINT SWITCH and get out of the mode.

Under the REF mode, the measurement of cornea diameter cannot be done.

MEASURING THE STATIC IMAGE

1. Focus the target eye.

2. Press the CORNEA DIAMETER SWITCH.

3. Make sure of the cornea diameter screen.

4. Press the MEASUREMENT SWITCH. The image of right eye is stored and the memory counter of screen changes to “1”.

NOTE: When the MEASUREMENT SWITCH is pressed repeatedly, the memory counter remains as is “1”, but the latest image is stored.

5. Store the image of left eye in like manner.

6. Press the CORNEA DIAMETER SWITCH.

7. Make sure of the cornea diameter screen.

8. Bring the left positioning bar to the left end of iris by pressing the AUTO START SWITCH (for moving left) and TARGET IMAGE SWITCH (for moving right).

NOTE: If it is necessary to move the left positioning bar again, press the MEASUREMENT MODE SWITCH. When the MEASUREMENT MODE SWITCH is pressed further, right and left positioning bars return to the initial positions.

9.  Press the MEASUREMENT SWITCH. The cornea diameter is displayed.

10. Press the MEASUREMENT SWITCH. The measurement mode of left eye sets in. Measure also the left eye in like manner.

NOTE: 

When the image of only one eye is necessary, press the CORNEA DIAMETER SWITCH after storing the image.

When images of both eyes are stored, the left/right eye screen can be switched by pressing the CORNEA DIAMETER MEASUREMENT SWITCH.

1. Make sure the unit is in the corneal curvature measurement (R/K or KRT) mode. If not, choose the R/K or KRT mode by the MEASUREMENT MODE SWITCH.
2.  Fill the concave part at the top of contact lens holder of model eye with water, and paste the contact lens.

  • The contact lens adheres by surface tension.
  • Take care not to allow bubbles in between.
  • Also take care and keep the measured lens surface free of water drops.

3. Insert the model eye into chinrest tissue pins.


4. Do measurement in like manner as the corneal curvature measurement.

  • When measuring the base (concave) curve of contact lens, the axial angle is reversed from the normal (convex) corneal curvature measurement.