Can I measure my visual clarity to get glasses or contact lenses using Dyop®?

The personal version of the Dyop® test is intended to measure your visual clarity; however getting glasses or contact lenses requires a refraction by your eye doctor which CAN NOT be done on a two-dimensional display such as a computer.  Measure your vision with the Dyop test using the Dyop Test, and if you can’t see clearly enough, go see your eye doctor.

How accurate are the results?

Dyop® tests determine visual acuity based upon photoreceptor physiology with a precision (approximately +/- 0.06 diopters) not previously available with traditional static image visual acuity tests.  Unlike static image tests, which may be dependent upon cognition as much as they are for visual acuity, Dyop® tests also maintain a higher level of accuracy as visual acuity decreases with increased blur.

Preliminary studies indicate that Dyop® acuity tests:

  • are more accurate than Snellen/Sloan tests,
  • are more consistent than Snellen/Sloan tests,
  • are potentially faster to use than Snellen/Sloan tests,
  • maintain greater precision as refractive power increases,
  • inherently avoid overminused and underminused refractions,
  • minimize optotype fixation and decision fatigue,
  • minimize image memorization,
  • do not require the ability to read to measure visual acuity,
  • potentially save doctors and patients’ time and money in determining visual needs.

Are my glasses making my eyes worse?

It is easy to notice when your glasses “should be stronger” as to not having sufficient minus spherical magnification power.  If you are “nearsighted” (myopic) the images you see should be blurry.

However, your glasses may actually be making your eyes worse by having too much minus spherical magnification power if you are “near sighted” (myopia).   Your glasses may also be making your eyes worse by not having enough plus spherical power if you are “far sighted” (hyperopia).

The simple test as to whether your glasses have the correct spherical power is to move your glasses one half to one inch forward from your face as you read this text.  The movement of your glasses AWAY from your face should change the refractive power of your lenses by about +/- 0.25 diopters.  If you are near-sighted (myopia), and your refraction is proper, the words may get smaller but the clarity of the words does not improve.  You have PASSED the test.

However, if the words you are reading become clearer and MORE legible when you move your glasses forward, you may inadvertently have too much minus power in those lenses, and you glasses FAILED the test.  They are making your eyes worse!

Because of the need for cylinder compensation, it is virtually impossible to have a refraction without the professional assistance of an optometrist, ophthalmologist, or optician.

What platforms are supported?

The Dyop® Test is exclusively available to Chart2020® only.  Compatible with Windows 7/8/10.

A consumer version of the Dyop® test is available on an iPad using an iPhone as a controller.

You can control the test with the IR Remote Controller, Keyboard shortcuts, iPad Controller and repeat monitor.

The iPad interface (or dual monitor windows setup) has a private doctor answer screen, which allows you to view and control the Dyop sizing, spin direction, pausing and switching the spinning target.

Please contact us for more information about setting up your refraction lane in the best possible way.

Is DYOP a similar to Snellen, Sloan, and Landolt tests?

Dyop® acuity tests are intended to be a more precise and faster to use replacement for Snellen, Sloan, and Landolt visual acuity/refraction tests.

Dyop® tests use apparent motion detection from the strobic stimulus and refresh rate of the photoreceptors to determine the visual acuity and refraction endpoints.  Snellen letters are culturally derived, NOT proportional, and do NOT provide a consistent basis for determining visual acuity.  As a result, Dyop® tests are more accurate and efficient than the 1862 classic Snellen test, and create a visual acuity test based on physiology rather than subjective and imprecise cognition.

Dyop® tests do not require patient literacy to measure visual acuity enable patients to have a visual acuity endpoint which avoids overminused refractions which seem to be inherent with static image fixation.  It is typically difficult for patients to perceive when optotypes are “too crisp” (over- minused), despite the discomfort and visual stress, which is one of the inherent inadequacies with Snellen and other static image tests.