HIDING HEIDI™ Low Contrast Face

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Visual communication is the most important
communication method during the first year
of life. The ability to detect objects of low
contrast is an important component of the
visual system. For example, facial expressions
are mediated by faint shadows and changes
in the contours of the mouth and eyes.
Determining the levels of contrast that an
infant can detect helps provide baseline data
for evaluating future changes. For example,
deviations from usual behavior may indicate
disorders that leave vision at high-contrast
levels unaffected.
Four cards printed on both sides in the
following contrast levels: black, 25%, 10%,
5%, 2.5%, and 1.25%. Cards are 9" x 9" (23
cm x 23 cm). Includes instructions.
Double Sided (Four Cards) . . . . . . . .253500
Single Sided (Seven Cards) . . . . . . . .253510