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Dyop® - Dynamic Optotype™ Helping the world see clearly, one
person at a time |
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Visual Acuity
Testing for Children over one year of age in 20 seconds
or less
Visual
Acuity Testing in Color for Children in 60 seconds or less
and
Infant Visual Acuity in 60 seconds or less
Infant Acuity Test Description
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The Dyop® Children’s Visual Acuity Screening
Test for Children over one year of age is a rapid (approximately 30 seconds per color/combination) and simple way to measure the visual
acuity for young child (or visual acuity of a non-verbal adult) with a method
that directly relates to Dyop®
adult visual acuity. This test can be used on a 22 inch diagonal monitor at a three foot viewing distance or an
iPad at a one foot viewing distance. The appropriate monitor size and viewing
distance should provide a sufficient separation between the static and
spinning Dyop® rings on each side
of the display to enable tracking the subjects’ head and eye motion.
The typical response of a young
child is to watch the side of the monitor with the spinning Dyop® ring rather than the side of the
monitor with static Dyop®
ring. Click Start to begin the test.
As the location of the spinning Dyop® ring alternates from side to
side on the monitor, young children will change
their fixation to instinctively move
their head and eyes to focus on the spinning Dyop® ring. A mirror may be strategically placed so
that an observer holding a young child in their lap can use that mirror to
better watch the child's eyes and head motion. With a 19 inch diagonal monitor, the visual acuity endpoint distance is 30 inches feet
rather than 3 feet. With a 15 inch
diagonal monitor, the visual acuity endpoint distance is 24 inches feet rather than 3 feet. Each part of the
test takes about 30 seconds. Initially
have the
young child should be sitting at a three foot viewing distance from the
monitor. The young child should be
able to observe the spinning of the 20 foot 20/20 Dyop® visual acuity endpoint. Clicking Start
for Black/White or Red or Green or Blue test
will have the Dyop® rings begin to
get incrementally smaller from the 10 to 8 to 6 to 4 foot visual acuity endpoints. The
young child should be able to demonstrate that they are tracking the location
of the spinning Dyop® by
alternately moving their head and eyes from side to side as the location of
the spinning Dyop® ring changes. If the young child has
20/20 visual acuity, they SHOULD
be able to detect the location and spinning of the smallest (and final) 4
foot 20/20 Dyop® at a three foot viewing distance. The visual acuity endpoint diameters may also be
manually validated using the 20, 15, 10, 8, 6, and 4 foot endpoint sizes. If the rings are too small for the subject
to detect the spinning, visual problem would be indicated by the young child
rapidly moving their head and eyes from side to side trying to locate the
spinning Dyop®. This can also be validated by moving the
child closer to the monitor to see if the subject can detect the spinning of
the smaller Dyop® rings. Repeat the visual screening test for Red, Green, Yellow, and
Blue colored Dyop® rings. You can verify the young child’s
response by moving them outside of the visual acuity
endpoint distance (further away) from
the monitor. The response from a
distance outside of the visual acuity endpoint will be for a young child to rapidly move
their head and eyes from side to side trying to locate the side of the panel
with the spinning Dyop® rings. A verbal child will typically blurt out,
“It’s disappeared!!!!! Note: Dyop®
tests are for vision screening
purposes only and
are NOT a
substitute for an examination by a licensed vision care |
The Dyop® (Dynamic
Optotype™) tests and concept are covered under U.S. Patent US 8,083,353
and International Published
Patent WO 2011/022428.
For further information contact:
Allan Hytowitz at Allan@Dyop.org
5035 Morton Ferry Circle, Alpharetta, GA, 30022 /
404-281-7798
Copyright©2020 DyopVision™ Associates. All Rights Reserved.