14
Rep
eat with opposite eye. (Slide 1000-22)
20/50
20/40
20/30
20/20
Left E
ye Right Eye Occluded
THE PLUS LENS SYSTEM
• The plu
s lens system tests for excessive farsightedness
(hyperopia). The plus lens system supplied with the
"OPTEC
®
1000 Vision Tester" is a plus 1.75D; other powers are
available as optional equipment
• A child scoring 20/40 or poorer on TESTS #1 & #2 should not be
given the plus lens test. (Tests #3 & #4)
• Insert the lens into the slot at the top of the face plate with the label
away from the subject
• A child with normal vision will NOT be able to read the 20/20 line
through the plus lenses, a PASS.
• If the child CAN read the 20/20 line through the plus lens, he then
FAILS the test.
• The ability to clearly read 20/20 through plus lenses is abnormal
and could indicate excessive farsightedness.
• This test is very important for school age children
20/200
20/100
20/70
20/50
20/40
20/30
20/20
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