What Is a Glare Test

Glare testing can be used to verify the vision loss associated with clouding of the posterior capsule (posterior capsule opacification or PCO) after cataract surgery. Patients can be quickly tested with and without glare to determine if the PCO is causing sufficient light scatter to be debilitating for the patient.

How is a glare test performed?

By using a reduced contrast chart (about 10% contrast), glare testers can detect lower levels of glare disability. In most cases the patient reads the test target without the glare source, then with it.

What does a glare look like?

Glare is light that enters your eye and impedes your vision, like when a camera flash goes off. Seeing bright circles or rings around a light source, like headlights, are known as halos. Halos around lights are most noticeable at night or when you’re in dim or dark areas.

Maya Lin-Takahashi

Maya Lin-Takahashi

Consumer Tech & Gadget Reviewer

Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.

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