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1.
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Outward
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85°
|
|
2.
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Down and outward
|
85°
|
|
3.
|
Down
|
65°
|
|
4.
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Down and in
|
50°
|
|
5.
|
Inward
|
60°
|
|
6.
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Inandup
|
55°
|
|
7.
|
Upward
|
60°
|
|
8.
|
Upandout
|
55°
|
|
|
Total
|
500°
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The minimum of the visual field is defined as 5% concentric central contraction.
Ocular Motility: Maximum ocular motility is present if there is normal ocular motor coordination with no diplopia in all parts of the field of binocular fixation. The minimum limit of ocular motility is defined as diplopia in all parts of the field of binocular fixation, or absence of binocular motor coordination.
MEASURE AND COMPUTATION OF LOSS Central Visual Acuity
a. Near and distance vision will be measured separately with correction.
b. Snellen chart for distance and the AMA chart for near vision will be used.
c. llumination will be at least five foot candles
d. Loss of central vision will be computed from a table provided, using the corrected near and far vision for each eye. The upper figure of the two figures provided will be the percentage loss of central vision for that eye. In the case of aphakia or pseudoaphakia, the lower of the two figures will be used.
Visual Field
a. Perimetric standards for determination are as previously described, except that in cases of aphakia the white disc shall be 6mm rather than 3mm.
b. The amount of radial contraction shall be determined in the eight principal meridians, as defined. The visual field loss of each eye, expressed as apercentage, is the sum of the degrees of field vision loss in the principal meridians divided by 500.
c. If the central contraction is 5 degrees, the loss is 100%
d. If the field impairment is irregular and not fairly disclosed by the principal meridians, the loss in a number of additional radii shall be used and the divisor in the equation shall be adjusted accordingly.
e. When the loss is limited to less than the full visual field, the degrees of loss in each included meridian shall be added to one-half of the sum of the two boundary meridians, boundary perimeters being the principal meridians on either side of the impaired field.Ocular motility will be measured in all parts of the motor field either with or without correction as determined by the examiner to provide the most accurate determination.
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