Loss or reduction of peripheral or central vision in parts of the visual field.
The most important evidence for this condition is a formal visual field test, commonly a Humphrey or Goldmann perimetry examination. For half-field losses — temporal, nasal, inferior, or superior — the records need to show clearly which half is affected and whether one or both eyes are involved. For homonymous hemianopsia, records should document that the same-sided field is lost in both eyes.
For concentric contraction, the perimetry report needs to state the number of degrees of field remaining in the affected eye or eyes. The difference between, for example, 15 degrees and 16 degrees remaining field can move the rating from one level to the next, so precise measurements matter.
Ophthalmology or optometry clinic notes, VA examination reports, and treatment records that show repeated or consistent field testing all help establish the severity and stability of the loss. Statements from you or people who know you describing how the field loss affects your ability to work, drive, read, or navigate your surroundings can support the overall picture of functional impact, even though the rating levels themselves are set by the measured field results.
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.
