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38 CFR 4.76a – Computation of average concentric contraction of visual fields

MeridianNormal degrees
Temporally85
Down temporally85
Down65
Down nasally50
Nasally60
Up nasally55
Up45
Up temporally55
Total500

Example of computation of concentric contraction under the schedule with abnormal findings taken from Figure 1.

LossDegrees
Temporally55
Down temporally55
Down45
Down nasally30
Nasally40
Up nasally35
Up25
Up temporally35
Total loss320
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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