11
MULIPLE ACUITY TEST SLIDE (1000-023)
LETTER ACUITY
1. Test #3 & 4
2. Right & Left Eye Illuminated
20/200
20/100
20/70
20/50
20/40
20/30
20/20
Left Eye Right Eye
Ask the subject, "How many columns of letters do you see?" The answer is
three.
Then ask the subject to read line 5 completely. If this is correct, proceed to
line 6, if correct proceed to line 7, if correct, the subject has 20/20 vision, or
better, in the right eye, left eye, and both eyes together. The scoring key is
printed on the record form.
Two or more letters incorrectly identified on any one of lines (3 to 7) PER
COLUMN, is considered a FAIL for that acuity level IN THAT COLUMN.
A DIFFERENT ACUITY READING FOR EACH COLUMN IS POSSIBLE
WITH THE CENTER COLUMN BEING THE MOST CRITICAL. It is critical
because this is the binocular acuity test, while the right and left columns
are only monocular acuity tests. Our actual vision is binocular, not
monocular.
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