We also informally did visual fields on the Zeiss Humphrey Field Analyzer 3 machine and found that its opaque patch caused blackout, but the diffuser patch did not cause blackout. Figure 4.

Visual snow syndrome is a rare condition that causes a continuous visual disturbance that occupies the whole visual field. The syndrome is characterized by visual static, which appears as tiny ...

Additionally, people with visual snow may experience palinopsia or shadow-like images—text from a book or images from a screen—that remain in their field of vision even after looking away.

Hemianopia, or hemianopsia, is a condition when a person loses half of their vision field. Learn here about hemianopia causes, symptoms, treatments, and more.

Results also showed that 45.9% of patients had one to two visual field tests per year, 14.8% had at least two and 39% had fewer than one test per year. Less than half of all tests (44.9%) were ...

A stroke or brain injury can affect visual field, and usually causes visual field loss in both eyes. The vision loss is due to injury in the brain, rather than any problems with the eyes.

This is the second committee meeting of a study aimed at reviewing the latest published research on the measurement of visual field loss in connection with disability evaluations. The committee ...

One area that is particularly ripe for disruption is perimetry testing. Virtual-reality (VR) visual field monitoring could enable a pivot away from traditional in-office automated perimetry.

To do so, they trained macaque monkeys — a species whose visual systems and abilities are most similar to humans — to fixate on the center of a screen while visual stimuli were presented in and ...