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What is the hole occluder?
A hole occluder is an opaque disk with one or more small holes through it, used by ophthalmologists, orthoptists and optometrists to test visual acuity. The occluder is a simple way to focus light, as in a hole camera, temporarily removing the effects of refractive errors such as myopia. Because light passes only through the center of the eye's lens, defects in the shape of the lens (errors of refraction) have no effect while the occluder is used.
How to use?
Squinting and looking through a tiny hole made with a finger works similarly to a hole occluder, by blocking light through the outer parts of the eye's lens. An improvised pinhole has a similar but better effect. The same principle has also been applied as an alternative to corrective lenses: a screen of holes is mounted on an eyeglass frame and worn as hole glasses.
Elaine Hawes
Reviewed in the United States on February 25, 2025
The item arrived as described
melanie
Reviewed in the United States on February 18, 2025
Useful tool.
Voltaire Roxas
Reviewed in the United States on January 5, 2025
Like it for its sturdiness
Doris M.
Reviewed in the United States on September 15, 2024
Needed to insure I could pass an eye exam
Bridget Atyeo
Reviewed in the United Kingdom on August 21, 2024
Perfect for work
Cliente de
Reviewed in Mexico on March 1, 2024
Buena calidad
Benny Paleoski
Reviewed in Australia on October 30, 2024
Works as I expected.
Laura Anabel
Reviewed in Spain on January 15, 2024
Llego en tiempo y forma . Conforme con la compra es lo que esperaba .
Claire
Reviewed in the United States on September 4, 2023
After cataract surgery, seeing words and charts on TV was not very clear. Since I usually see better when looking through the pinholes with the occluded when getting examined at the optometrist, I decided to try these. It definitely improved what I could now read on my TV.
Capt. Bill Rivera
Reviewed in the United States on May 31, 2023
We conduct medical examinations, which include the Snellin eye chart. This tool is used for an eye test. It is a good quality and works as expected. Can’t beat the price so I recommend it highly.
Giuseppe C.
Reviewed in Italy on September 5, 2022
Buon prodotto
djpmapfer
Reviewed in the United States on July 23, 2022
Unless you have experienced this, you are unlikely to believe how much of an effect this can have on poor vision. Now in my '70's, my previously very good vision has declined so that I needed reading glasses; and then sadly my longer distance vision began to blur. I was unable to read subtitles on TV. The optometrist did various tests with lenses and the like, and then got me to use one of these. The image immediately became sharp, clear and undulled. Now these guys sit beside me, when I watch TV. Everything is crystal clear.
DAVE H.
Reviewed in the United States on October 12, 2020
I had recent cataract surgery. It went well but, due to a previous radial keratotomy my post op visual acuity was not as good as I had hoped. I ordered a Snellen eye chart and this pinhole occluder from Amazon. I discovered that, with the occluder I could read the 20/20 line well and all but one letter on the 20/16 line. This gives me confidence that, with corrective lenses, I should be able to have at least 20/20 vision. The occluder was easy to use and, unlike some other reviewers, I found that the holes in the occluder were fine for me. Good value and relieved my anxiety that I might not be able to see well, even with glasses. I recommend it.
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