38 CFR § 4.76a
Computation of average concentric contraction of visual fields
November 5, 2020
Table III—Normal Visual Field Extent at 8 Principal Meridians
Open Table
| 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.
Open Table
| 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 = 221⁄2 ° average concentric contraction.
(Authority: 38 U.S.C. 1155)
[43 FR 45352, Oct. 2, 1978, as amended at 73 FR 66549, Nov. 10, 2008]
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