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Dyop® - Dynamic Optotype™ Helping the world see clearly, one
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Visual
Acuity Testing for Infants and Children in 30 seconds
Visual
Acuity Color Testing for Infants and Children in 90 seconds
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Adobe Flash format |
Adobe SWIFFY format |
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Adobe SWIFFY format |
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The Dyop®
Infant Visual Acuity Screening Test for Infants and
Children is a rapid (approximately 30 seconds per
color/combination) and simple way to
measure the visual acuity for an infant or 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 moving
Dyop® images on each side of the
display to enable tracking the subjects’ head and eye motion. The typical response of an
infant/child is to watch the side of the monitor with the moving Dyop® images rather than the side of
the monitor with static images. Click Start to begin the test. As the location of the moving image alternates
from side to side on the monitor, infants and children will change their fixation to instinctively
move their head and eyes to focus
on the moving Dyop® image. A
mirror may be strategically placed so that an observer holding an infant/child
in their lap can use that mirror to better watch the infant/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. NOTE:
The tone every four seconds is to provide a secondary auditory stimulation
for children. Adults may find it
distracting (or irritating). Click
MUTE or Turn OFF the computer speakers if the SUBJECT finds it distracting.
Each part of the
test takes about 30 seconds. Initially
have the
infant/child sitting at a three foot viewing distance from the
monitor. The infant/child should be
able to observe the rotation 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 images begin to get incrementally smaller from the 10 to 8 to 6
to 4 foot visual acuity endpoints. The infant/child should be able to
demonstrate that they are tracking the location of the Dyop® rotation by alternately moving their head and eyes from
side to side as the location of the rotating Dyop® image changes. If the infant/child has 20/20 visual acuity,
they SHOULD be able to detect the
location and rotation of the smallest 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 images are too small for the subject to detect the rotation,
visual problem would be indicated by the infant/child rapidly moving their
head and eyes from side to side trying to locate the Dyop® rotation. This can also be validated by moving the
child closer to the monitor to see if the subject can detect the motion of
the smeller images. Repeat the visual screening test for Red, Green, and Blue
colored Dyop® images. You can verify the infant/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 an infant to rapidly move their
head and eyes from side to side trying to locate the panel with the Dyop® image rotation. A verbal child will typically blurt out,
“Its disappeared!!!!! Note: Dyop®
tests are for vision screening
purposes only and
are NOT a
substitute for an examination by a licensed vision care professional.
The computerized Dyop® tests use
Adobe Flash and may be viewed virtually any computer using Google Chrome or Internet Explorer (with
ActiveX enabled) or Firefox or
Safari or other graphics viewers
such as Irfanview with
the Flash Graphic
plug-ins and the free Adobe Flash Graphic Viewer enabled. To use the Dyop® tests on a Tablet/SmartPhone, such
as an iPad or iPhone, you need to use the Adobe Flash SWIFFY HTML
Dyop® test versions, however, the SWIFFY HTML tests will NOT properly display with older
versions of Internet Explorer. |
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 /
678-893-0580
Copyright©2016 DyopVision™ Associates. All Rights Reserved.