Visual Field Test

Visual Field Test is an education tool. A browser-based visual field screening and monitoring tool. Cover one eye, fix on a center cross and click when a flash appears; Simple mode gives a fast check, Advanced mode measures threshold sensitivity in decibels with MD and PSD.

Visual Field Test is a browser-based perimetry tool that lets you screen and monitor your peripheral vision from a home computer. The premise is straightforward: glaucoma and several other eye conditions erode side vision gradually, and the brain fills in the gaps so convincingly that people often notice nothing until damage is well advanced. The site positions the product as a way to build a personal record between professional exams, not as a diagnostic instrument, and it states that limitation plainly on the homepage. The mechanics follow the shape of a clinic test. You cover one eye, fix your gaze on a central cross, and press space or click whenever a small light flashes somewhere in your peripheral field, whether or not you can pinpoint it. Two modes serve different purposes. Simple mode skips screen calibration and runs a quick check that flags unreliable responses through false clicks and rechecks missed points. Advanced mode requires monitor calibration and performs threshold testing, measuring sensitivity at each grid point in decibels and reporting Mean Deviation and PSD alongside an overall score, on a 24-2 style grid. Output is where the product does the most work. Each run produces a color-coded map (blue for seen points, orange for misses), a score, duration and consistency checks, plus an AI generated summary written in plain language. Results save automatically and chart into weekly, monthly and yearly trends per eye. A comparison view lines tests up chronologically, separating points that recovered on retest from newly missed ones and computing overall change. Printable PDFs bundle a threshold map, grayscale, total deviation, probability map and global indices for a clinician to review, and read-only sharing lets a doctor or relative see the history. It suits people with a glaucoma diagnosis or family history, anyone over 40 with elevated eye pressure, and patients asked to monitor between clinic visits. The interface and reports are available in 30 languages. Anyone expecting parity with in-clinic Humphrey perimetry should read the FAQ first: the site itself says home testing on a screen is not identical to a clinical exam.