38 CFR 4.76a – Computation of average concentric contraction of visual fields
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Table III—Normal Visual Field Extent at 8 Principal Meridians
Meridian | Normal degrees |
---|---|
Temporally | 85 |
Down temporally | 85 |
Down | 65 |
Down nasally | 50 |
Nasally | 60 |
Up nasally | 55 |
Up | 45 |
Up temporally | 55 |
Total | 500 |
Example of computation of concentric contraction under the schedule with abnormal findings taken from Figure 1.
Loss | Degrees |
---|---|
Temporally | 55 |
Down temporally | 55 |
Down | 45 |
Down nasally | 30 |
Nasally | 40 |
Up nasally | 35 |
Up | 25 |
Up temporally | 35 |
Total loss | 320 |
Remaining field 500° minus 320° = 180°. 180° ÷ 8 = 22