---
title: "§ 4.76a Computation of average concentric contraction of visual fields."
document: "38 CFR"
section: "§ 4.76a"
canonical: "https://veteranai.co/va-regulations/38-cfr/4.76a-computation-of-average-concentric-contraction-of-visual"
source: "https://www.ecfr.gov/current/title-38/section-4.76a"
updated: "2026-09-06T14:36:03.016367Z"
---

# § 4.76a. Computation of average concentric contraction of visual fields.

**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 = 221⁄2° average concentric contraction. |  |

[43 FR 45352, Oct. 2, 1978, as amended at 73 FR 66549, Nov. 10, 2008]