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Dyop® - Dynamic
Optotype™ Helping the world see clearly, one
person at a time |
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Personal Vision Test |
Color Screening Test |
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Dyop® Gap/Segment Motion
Dyop® Gap/Segment Photoreceptor Cluster Path |
The Dyop® is a Strobic Visual
Stimulus People who see clearly are typically more
productive and able to successfully participate and benefit from 21st century
technology. Seeing “clearly” is not
just a problem of images being too
blurry, but it also a problem of images being too crisp (overminused). Our eyes
developed as sensors for detecting motion, distance, and colors. The
strobic response to a spinning Dyop visual target lets you perceive images
and creates a more precise measure of visual acuity and refractions. As the spinning Dyop ring diameter gets smaller, or
your viewing distance increases, the arc width diameter of the Dyop appears
to get smaller, and the strobic area of the black/white gap/segments get
smaller. The Dyop acuity endpoint is the minimum
angular width (diameter) of the
Dyop where that spinning gap/segment
motion can still be detected. Static image and letter-based vision tests tend to
overminus refractions due to depletion of the photoreceptor response. Rather than enhancing visual acuity, static
image tests tend to increase visual stress, increase decision fatigue, and
create a less precise visual acuity measurement. The use of static letters to
measure acuity measures cognition as much as it does acuity. |
Scaled
static images are not as accurate in determining visual clarity as calibrated
rotating Dyop® images
The sample Dyop
images below are calibrated for a 19 inch diagonal monitor and a 10 foot
(3.05 meter) viewing distance.
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E |
E |
E |
E |
E |
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20/24 |
20/22 |
20/20 |
20/18 |
20/16 |
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15.2 |
12.7 |
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10.1 |
7.6 |
3.8 |
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Dyop
angular arc width controls the acuity endpoint
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The 1862 Snellen test is inherently imprecise As you move further from the screen, or
as the spinning Dyop rings get smaller, the ability to detect the spinning of
a Dyop disappears. Static letters get
blurrier but are still visible and static letter “acuity” is dependent upon
cognition rather than visual clarity The static-image visual acuity gap (the
Minimum AREA of Resolution) was
determined in 1862 by Snellen to be 1.0 arc minutes squared. The actual,
empirically determined, Minimum AREA
of Resolution is 0.54 arc minutes squared based upon the detection of a
moving visual stimulus. A reason for
the larger Snellen stimulus is the photoreceptor stimulus depletion from
fixating on static images which creates a visual preference for motion
detection. |
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The photoreceptors also function to focus the lens and detect
motion When you see the colors red, green, and
blue the focal depth of each color is different. That difference in focal depth stimulates the
respective color photoreceptors and helps to regulate the focal response and
shape of the lens. The lens adjusts
its shape to enable Red light to be focused BEHIND the retina, |
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Motion Detection Having the light receptive part of the
photoreceptors at the BACK of the retina allows the photoreceptors to have an
ability to detect motion based on the changing intensity and movement of
light across a grid of photoreceptors. The smallest diameter Dyop where
spinning can be detected (the Minimum
AREA of Resolution) is an acuity endpoint with a stimulus area of 0.54 arc
minutes squared or equivalent to a grid of about 20 photoreceptors |
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Dyop Refraction Optimization The Dyop test also allows the
optimization of refraction since deviations from the optimum Sphere,
Cylinder, and Axis will increase the arc width of Dyop acuity endpoint.
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“Any
sufficiently advanced technology is indistinguishable from magic.” 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 Dyop®
Vision Associates. All Rights Reserved. |