H53 Visual disturbances
H53.0 Amblyopia ex anopsia
H53.1 Subjective visual disturbances
- Day blindness
- Scintillating scotoma
- Sudden visual loss
- Visual halos
- visual hallucinations (R44.1)
- Double vision
H53.3 Other disorders of binocular vision
- Abnormal retinal correspondence
- Fusion with defective stereopsis
- Simultaneous visual perception without fusion
- Suppression of binocular vision
H53.4 Visual field defects
- Enlarged blind spot
- Generalized contraction of visual field
- Hemianop(s)ia (heteronymous)(homonymous)
- Quadrant anop(s)ia
H53.5 Colour vision deficiencies
- Acquired colour vision deficiency
- Colour blindness
- day blindness (H53.1)
H53.6 Night blindness
- due to vitamin A deficiency (E50.5)
H53.8 Other visual disturbances
H53.9 Visual disturbance, unspecified
H54 Visual impairment including blindness (binocular or monocular)
- For definition of visual impairment categories see table below.
- amaurosis fugax (G45.3)
H54.0 Blindness, binocular
- Visual impairment category 5
H54.1 Severe visual impairment, binocular
- Visual impairment category 2.
H54.2 Moderate visual impairment, binocular
- Visual impairment category 1
H54.3 Mild or no visual impairment, binocular
- Visual impairment category 0.
H54.4 Blindness, monocular
- Visual impairment categories 3, 4, 5 in one eye and categories 0, 1, 2 or 9 in the other eye.
H54.5 Severe visual impairment, monocular
- Visual impairment category 2 in one eye and categories 0, 1 or 9 in other eye.
H54.6 Moderate visual impairment, monocular
- Visual impairment category 1 in one eye and categories 0 or 9 in other eye.
H54.9 Unspecified visual impairment (binocular)
- Visual impairment category 9.
- The table below gives a classification of severity of visual impairment recommended by the Resolution of the International Council of Ophthalmology (2002) and the Recommendations of the WHO Consultation on “Development of Standards for Characterization of Vision Loss and Visual Functioning» (Sept 2003)
For characterizing visual impairment for codes H54.0 to H54.3, visual acuity should be measured with both eyes open with presenting correction if any. For characterizing visual impairment for codes H54.4 to H54.6, visual acuity should be measured monocularly with presenting correction if any.
If the extent of the visual field is taken into account, patients with a visual field of the better eye no greater than 10° in radius around central fixation should be placed under category 3. For monocular blindness (H54.4), this degree of field loss would apply to the affected eye.
Category Presenting distance visual acuity Worse than: Equal to or better than: 0 Mild or no visual impairment 6/18
1 Moderate visual impairment 6/18
2 Severe visual impairment 6/60
3 Blindness 3/60
4 Blindness 1/60*
Light perception 5 Blindness No light perception 9 Undetermined or unspecified * or counts fingers (CF) at 1 metre.
- Note: The term visual impairment in category H54 comprises category 0 for mild or no visual impairment, category 1 for moderate visual impairment, category 2 for severe visual impairment, categories 3, 4 and 5 for blindness and category 9 for unqualified visual impairment. The term «low vision» included in the previous revision has been replaced by categories 1 and 2 to avoid confusion with those requiring low vision care.