Dyop® - Dynamic Optotype™

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Dyop® Gap/Segment Motion

 

 

Dyop® Gap/Segment

Photoreceptor Cluster Path

The Dyop® Visual Stimulus Area

 

Visual acuity it is measured by the comfort and ability to read text, which now especially includes text on an electronic display.  People who are able to consistently see more clearly are typically more productive and able to successfully participate and benefit from 21st century technology.  However, vision science has not kept up with the precision and visual demands of 21st century visual needs.

 

Seeing “clearly” is not only a problem of images being too blurry, but it also a problem of images being too crisp (overminused).

 

The use of static letters is also as much a test of cognition as it is acuity.  Static letter tests, rather than enhancing visual acuity, increase visual stress, increase decision fatigue, and create a less precise visual acuity measurement because of the tendency of an overminused refraction increasing static image contrast.

 

The strobic response to a Dyop visual target can be used to let you perceive a pixelized response to the images you are seeing to create a more precise measure of visual acuity and refractions

 

As the rotating Dyop diameter gets smaller, or the viewing distance increases, the strobic stimulus area of the black/white gap/segments gets smaller.  That minimum angular arc width of the Dyop diameter and area of the gap/segment stimulus where you still detect the Dyop rotation/motion can be used as the acuity endpoint. 

 

The sample Dyop images below are calibrated for a 19 inch diagonal monitor and a 10 foot (3.05 meter) viewing distance.

 

Scaled static images are not as accurate in determining visual clarity as calibrated rotating Dyop® images

 

 

E

E

E

E

E

 

 

20/24

20/22

20/20

20/18

20/16

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 

 

 

 

 

     15.2   

12.7

 

     10.1

    7.6

    3.8

 

 

Dyop® angular arc width

 

 

The smallest diameter Dyop where motion can be detected indicates the acuity endpoint.

A  Dyop with a 6.75 mm screen diameter viewed at 10 feet (3.05 meters) has an acuity endpoint of 7.6 arc minutes.

 

 

 

 

 

When the Dyop gap/segment stimulus size is too small, or the distance is too far away, you cannot detect the visual pixel response or rotation/motion of the Dyop® gap/segments.  That minimum Dyop diameter and gap/segment stimulus where you CAN detect the Dyop® motion is the acuity endpoint.

 

The 1862 “standard” for acuity uses a letter-based test to detect perception of the differences between static letters such as “E” and “C.”  However, the use of static letters is as much a test of cognition as it is acuity.  Static letter tests, rather than enhancing visual acuity, increase visual stress, increase decision fatigue, and create a less precise visual acuity measurement.

 

The Dyop motion detection process increases accommodative rest, takes the guesswork and visual stress out of vision testing, and potentially increases the efficiency of the visual testing process.  Dyop® vision tests are more accurate than static image tests, more precise, more consistent, potentially faster to use, and do not require the ability to read, let alone the ability to read English.

 

 

 

 “Any sufficiently advanced technology is indistinguishable from magic.”
- Arthur C. Clarke’s Third Law

 

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

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