Certain infectious and parasitic diseases

H54.5 Low vision, one eye
Visual impairment categories 1 or 2 in one eye [normal vision in other eye].
H54.6 Unqualified visual loss, one eye
Visual impairment category 9 in one eye [normal vision in other eye].
H54.7 Unspecified visual loss
Visual impairment category 9 NOS.
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.
Other disorders of eye and adnexa
(H55-H59)
H55 Nystagmus and other irregular eye movements
Nystagmus:
· NOS
· congenital
· deprivation
· dissociated
· latent
H57 Other disorders of eye and adnexa
H57.0 Anomalies of pupillary function
H57.1 Ocular pain
H57.8 Other specified disorders of eye and adnexa
H57.9 Disorder of eye and adnexa, unspecified
H58* Other disorders of eye and adnexa in diseases classified elsewhere
H58.0* Anomalies of pupillary function in diseases classified elsewhere
Argyll Robertson phenomenon or pupil, syphilitic ( A52.1† )
H58.1* Visual disturbances in diseases classified elsewhere
H58.8* Other specified disorders of eye and adnexa in diseases classified elsewhere
Syphilitic oculopathy NEC:
· congenital:
· early ( A50.0† )
· late ( A50.3† )
· early (secondary) ( A51.4† )
· late ( A52.7† )
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