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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
Prototype Dyop® Children’s Test
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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. Prototype
Dyop Children’s Test (screen shot)
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, 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 specialist |
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@DyopVision.com
5035 Morton Ferry Circle, Alpharetta,
GA, 30022 / 404-281-7798
Copyright©2023 DyopVision™
Associates. All Rights Reserved.