H53 | Visual disturbances | |||||||
H53.0 | Amblyopia ex anopsia | |||||||
Amblyopia:
· anisometropic · deprivation · strabismic |
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H53.1 | Subjective visual disturbances | |||||||
# |
Asthenopia
Day blindness Hemeralopia Metamorphopsia Oscillopsia Photophobia Scintillating scotoma Sudden visual loss Visual halos |
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Excludes: | visual hallucinations
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H53.2 | Diplopia | |||||||
Double vision
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H53.3 | Other disorders of binocular vision | |||||||
Abnormal retinal correspondence
Fusion with defective stereopsis Simultaneous visual perception without fusion Suppression of binocular vision |
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H53.4 | Visual field defects | |||||||
Enlarged blind spot
Generalized contraction of visual field Hemianop(s)ia (heteronymous)(homonymous) Quadrant anop(s)ia Scotoma: · arcuate · Bjerrum · central · ring |
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H53.5 | Colour vision deficiencies | |||||||
Achromatopsia
Acquired colour vision deficiency Colour blindness Deuteranomaly Deuteranopia Protanomaly Protanopia Tritanomaly Tritanopia |
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Excludes: | day blindness
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H53.6 | Night blindness | |||||||
Excludes: | due to vitamin A deficiency
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H53.8 | Other visual disturbances | |||||||
H53.9 | Visual disturbance, unspecified |
H54 | Blindness and low vision | |||||||
Note: | For definition of visual impairment categories see table below. | |||||||
Excludes: | amaurosis fugax
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H54.0 | Blindness, both eyes | |||||||
Visual impairment categories 3, 4, 5 in both eyes.
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H54.1 | Blindness, one eye, low vision other eye | |||||||
Visual impairment categories 3, 4, 5 in one eye, with categories 1 or 2 in the other eye.
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H54.2 | Low vision, both eyes | |||||||
Visual impairment categories 1 or 2 in both eyes.
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H54.3 | Unqualified visual loss, both eyes | |||||||
Visual impairment category 9 in both eyes.
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H54.4 | Blindness, one eye | |||||||
Visual impairment categories 3, 4, 5 in one eye [normal vision in other eye].
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H54.5 | Low vision, one eye | |||||||
Visual impairment categories 1 or 2 in one eye [normal vision in other eye].
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H54.6 | Unqualified visual loss, one eye | |||||||
Visual impairment category 9 in one eye [normal vision in other eye].
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H54.7 | Unspecified visual loss | |||||||
Visual impairment category 9 NOS.
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Note: | The table below gives a classification of severity of visual impairment recommended by a WHO Study Group on the Prevention of Blindness, Geneva, 6-10 November l972.
[Foot note: WHO Technical Report Series No. 518, 1973] The term "low vision" in category H54 comprises categories 1 and 2 of the table, the term "blindness" categories 3, 4 and 5, and the term "unqualified visual loss" category 9. If the extent of the visual field is taken into account, patients with a field no greater than 10 o but greater than 5 o around central fixation should be placed in category 3 and patients with a field no greater than 5 o around central fixation should be placed in category 4, even if the central acuity is not impaired.
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Category of visual impairment | Visual acuity with best possible correction | |
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Maximum less than: | Minimum equal to or better than | |
1 | 6/18 | 6/60 |
3/10 (0,3) | 1/10 (0,1) | |
20/70 | 20/200 | |
2 | 6/60 | 3/60 |
1/10 (0,1) | 1/20 (0,05) | |
20/200 | 20/400 | |
3 | 3/60 | 1/60 (finger counting at 1 metre) |
1/20 (0,05) | 1/50 (0,02) | |
20/400 | 5/300 (20/1200) | |
4 | 1/60 (finger counting at 1 metre) | Light perception |
1/50 (0,02) | ||
5/300 | ||
5 | No light perception | |
9 | Undetermined or unspecified |