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Vision impairment

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

A vision impairment results when an eye condition affects the visual system and one or more of its vision functions. Typically, population-based surveys measure visual impairment using exclusively visual acuity, with severity categorized as mild, moderate or severe distance vision impairment or blindness, and near vision impairment. However, in the clinical setting, other visual functions are also often assessed, such as a person’s field of vision, contrast sensitivity and colour vision.

sections/codes in this section (9D90-9D9Z)

• Vision impairment including blindness  (9D90)
• Specific vision dysfunctions  (9D92)
• Complex vision-related dysfunctions  (9D93)
• Impairment of presenting visual acuity  (9D94)
• Impairment of best corrected visual acuity  (9D95)
• Impairment of uncorrected visual acuity  (9D96)
• Other specified vision impairment  (9D9Y)
• Vision impairment, unspecified  (9D9Z)

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