Vision measurement indicating significant impairment in one eye while the other eye has 20/100 vision.
The most important evidence under this code is a formal measurement of your best-corrected visual acuity in the other eye — the eye that still has usable vision. This is typically recorded during a VA examination or by an ophthalmologist or optometrist using a Snellen chart or equivalent. The record should show the corrected acuity fraction, such as 20/100 or 20/200, because that exact number determines which rating level applies. Records documenting any treatment, progression of vision loss, or prior acuity measurements over time can help show where your vision currently stands. Statements from you or people who know you describing how your reduced vision affects daily tasks — such as reading, driving, recognizing faces, or safely navigating your environment — can support the overall picture of functional impairment, though the acuity measurement itself is what the rating levels are built on.
Conditions that are often caused or made worse by this one. If you have any of these, they may be claimable as secondary service connection.