Visual field testing — the formal mapping of what each eye can see across its full range — is one of the most useful diagnostic tools in ophthalmology, and especially in low vision evaluation. For patients with macular degeneration, glaucoma, stroke, or other conditions affecting parts of the visual field, perimetry quantifies what's gone, what remains, and how to make the most of remaining vision. What a visual field test actually measures The eye has a wide field of view…
Perimetry — the formal mapping of the visual field — has been a foundational tool in ophthalmology for over a century. Goldmann perimetry, the manual technique developed in the 1940s, set the standard for how we evaluate the visual field for decades. The transition to standard automated perimetry in the 1980s made testing more reproducible and easier to perform. The next set of advances is changing the rate at which we can detect disease progression — and that has clinical…