Dyop® - Dynamic Optotype™ Helping the world see clearly, one person at a time.
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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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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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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. The
lens adjusts its shape to enable Red light to
be focused BEHIND the
retina, Green light ON the retina and Blue light in
FRONT of the
retina. That color disparity allows
the eye to use Chromatic Triangulation to
modulate the shape of the lens to regulate the focal depth of light and
correlate to the distance of the visual target. |
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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@DyopVision.org 5035
Morton Ferry Circle, Alpharetta, GA, 30022
/ 404-281-7798 Copyright©2023
Dyop® Vision Associates. All Rights Reserved. |