PDR-7000 Operation Manual
4.5 Binocular Visual Function Test
4.5.1 Binocular balance test
Use: To check the binocular balancing
Chart: Binocular balance
Auxiliary lens: Right eye 135°, left eye 45°, polarizing filters
Ideal appearance (PLC-8000pola)
Right eye Left eye Binocular ideal
The sharpness of the top and
bottom lines is equal.
Ideal appearance (PLC-7100pola)
Right eye Left eye Binocular ideal
The sharpness of the top and
bottom lines is equal.
Ideal appearance (PACP-7000/PACP-7000L)
Right eye Left eye Binocular ideal
The sharpness of the top and
bottom lines is equal.
[Procedure example]
1. Present the binocular balance chart.
Press the binocular balance testing chart
The polarizing filters are placed in the measuring windows. The PDR-7000 goes into
SPH mode.
2. Fog the binocular vision.
Press and turn the dial counterclockwise so that the binocular VA
becomes between 0.63 and 0.8.
The VA of each letter on the chart is 0.4, 0.5, 0.63, 0.8, and 1.0 moving from the left to
light.
3. Ask the patient, “Which is sharper, the top or bottom line?"
The top line is sharper. Press and add SPH +0.25 D. (Turn the dial
counterclockwise.)
The bottom line is sharper. Press and add SPH +0.25 D. (Turn the dial
counterclockwise.)
The top and bottom lines should appear equal. When the patient can not see them
equally, select which eye is seen sharper according to the LM data or dominant eye for
that determine either eye.
4. Clear fogging applied in Step 2.
Press and turn the dial.
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