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The Origins of Dyops®
The Dyop™ Revolution
Allan HytowitzDyop® Vision Associates LLC
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<=Computer Lenses=>===========================Progressive Lenses =========================
The effect of 1 diopter in excess
Allan’s Problem
Alla
n’s
Ref
ract
ion
(O
S)
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Olny srmat poelpe can raed tihs.
The phaonmneal pweor of the hmuan mnid, aoccdrnig to a rscheearch at Cmabrigde Uinervtisy, is taht it deosn't mttaer in waht oredr the lterets in a wrod are, the olny iprmoatnt tihng is taht the frist and lsat lteetr be in the rghit pclae. The rset can be a taotl mses and you can sitll raed it wouthit a porbelm. Tihs is bcuseae the huamn mnid deos not raed ervey lteetr by istlef, but the wrod as a wlohe.
Allan’s view with Computer Lenses
Allan’s Problem
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Allan’s view with Progressive Lenses
Allan’s Problem
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Inherent Vision Loss with Progressive Lenses
Astigmatic AreaDyslexic Area
Dyslexic Areas caused blurry and distorted visionand almost four years of functional blindness
Astigmatic AreaDyslexic Area
Allan’s Problem
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Allan’s Original Vision Test Device
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Early attempts to create a rotating imageOriginal segmented rotating circle
Rotating Segmented Circles
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Early attempts to create a rotating image
Rotating Segmented Circles
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Focus on Circle 0 (zero), and then MOVE ONLY YOUR EYE(S) to note which circles appear to be out of focus.
Each number represents 2 arc degrees when viewed at 28 inches on a 19” monitor.
Allan’s view with Single Vision Lenses
1 2 43 95 6 7 8 101 2 43 95 6 7 8 100
Display of a row of segmented rotating circles
Rotating Segmented Circles
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“Rotating Segmented Circles”
July 2008 + 100 hours
Original segmented rotating circle
10 20 4030 9050 60 70 80 100
+
%
As you MOVE ONLY YOUR EYE(S) the dyslexic areas become blurry with color distortion
How big should the “Rotating Segmented Circles” be?
Allan’s view with Single Vision Lenses
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July 2008 + 100 hours
Original segmented rotating circle
10 20 4030 9050 60 70 80 100
+
%
As you MOVE ONLY YOUR EYE(S) the dyslexic areas become blurry with color distortion
How big should the “Rotating Segmented Circles” be?
Dyslexic Areas
“Rotating Segmented Circles”
Allan’s view with Single Vision Lenses
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Inherent Dyslexic Vision Loss
Astigmatic AreaDyslexic Area
Dyslexic Areas caused blurry and distorted visionand almost four years of functional blindness
Astigmatic AreaDyslexic Area
Allan’s Problem
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Left Normal colors Right
Allan’s view with Progressive LensesPeripheral color distortion reduces comprehension
Dyslexic AreaDyslexic Area
Allan’s view with Progressive LensesAstigmatic color shift Astigmatic color shift
Allan’s Problem
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15107 20 304
Dyops™Dynamic Optotypes™
How big should the “Rotating Segmented Circles” be?You either see the rotational motion at that distance,
or you don’t.Copyright©2015 – Dyop® Vision Associates – All Rights Reserved
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Dyop™ color = White vs. Black Dyop™ background = Black vs. White
Dyop™ stroke width = 2.5 % sw to 20% sw? Dyop™ sectors = 2 sectors to 16 sectors?Dyop™ 20/20 diameter = 12 mm to 16 mm
Dyop™ shape = dots vs. segments vs. triangles?
What is a Dyop™?
What is the Optimum Dyop™?
Dyop ™ = dynamic optotype
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Dyop ™ stroke width versus photoreceptor stimulus path
Thinner Dyop™ = thinner segment photoreceptor stimulus Thicker Dyop™ = thicker segment photoreceptor stimulus
Dyops™ - Pixels in the Eye
Allan’s Theory
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Dyop ™ stroke width versus Perception Distance
Dyop ™ stroke width versus Perception Distance
Dyop™ Threshold Image versus Perception Distance as of 2009-10-27
Stroke widths (& gap widths) of 2.5%, 3.75%, and 5%8 segments per Dyops™ with 22.5 degree gap height @ 40 rpm
White segments on a Black Background
Threshold Image diameter
Perception Distance2.5% stroke width
Perception Distance3.75% stroke width
Perception Distance5% stroke width
mm (* see Note) PD - feet* PD - feet* PD - feet*
18 24 25 26
17.25 23 24 25
16.5 22 23 24
15.75 21 22 23
15 20 21 22
14.25 19 20 21
13.5 19 19 20
12.9375 18 18 20
12.375 17 17 19
11.8125 16 16 18
What is a Dyop™?
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Optimum Dyop™ Stroke Width
Optimum Dyop™ Stroke WidthCopyright©2015 – Dyop® Vision Associates – All Rights Reserved
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12,000 Hours Later…
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The Vision Revolution
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