83
D
D
i
i
g
g
i
i
t
t
a
a
l
l
R
R
e
e
f
f
r
r
a
a
c
c
t
t
o
o
r
r
E
E
D
D
R
R
7
7
8
8
0
0
0
0
10.11
10.11
10.11
10.11
(Monocular) Red/Green Test
Purpose: Check the maximum revised Spherical Refractive Power for Monocular by Red/Green
Test Chart, using the principle of chromatic aberration, Subjective test.
Chart: Red/Green Chart
Auxiliary Lens: None
Target: Letters on Red and Green Charts must be seen equally and clearly.
Way of Test
1. On Special Chart clause of touch screen, press Red/Green Chart button to change it into
Red/Green Test Mode.
2. Press (R) or (L) key to choose the field for test.
3. Question the patient that which of green and red is seen more clearly or more thickly, and check
whether
both of them are seen equally.
4. If red one is seen more clearly or both of them are seen clearly, try to add -0.25D and If green one
is seen more clearly, try to add +0.25D.
6. Adjust until both are seen equally.
※
Attention
- In case of distorted vision, this test is not available for the normal visual acuity above 1.0 or an
accurate visiual acuity test.
- In some cases, a patient cannot compare the black letters in red and green background respectively,
and cannot react following his preference.
- If a corrected vision of a patient is 1.0, you must ask him whether he is able to see well “29 in red
and 92 in green.” In case a corrected vision is low, ask him to read the bigger letter on the upper side.
[Figure 10-11] (Monocular) Red/Green Test
