Description
Click here to view the pdf catalogue
The test consists of 15, 2" x 2" (5 cm x 5 cm)
red, blue, and white plastic chips designed to
help parents, teachers, and doctors assess
children’s visual difficulties in twilight. The test
situation is not a formal test of night vision, but
gives useful information on visual adaptation
to lighting changes.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 252900