H53 Visual disturbances

H53.0 Amblyopia ex anopsia

Incl.:

Amblyopia:

• anisometropic
• deprivation
• strabismic

H53.1 Subjective visual disturbances

Incl.:

Asthenopia

Day blindness

Hemeralopia

Metamorphopsia

Photophobia

Scintillating scotoma

Sudden visual loss

Visual halos

Excl.:

visual hallucinations ( R44.1)

H53.2 Diplopia

Incl.:

Double vision

H53.3 Other disorders of binocular vision

Incl.:

Abnormal retinal correspondence

Fusion with defective stereopsis

Simultaneous visual perception without fusion

Suppression of binocular vision

H53.4 Visual field defects

Incl.:

Enlarged blind spot

Generalized contraction of visual field

Hemianop(s)ia (heteronymous)(homonymous)

Quadrant anop(s)ia

Scotoma:

• arcuate
• Bjerrum
• central
• ring

H53.5 Colour vision deficiencies

Incl.:

Achromatopsia

Acquired colour vision deficiency

Colour blindness

Deuteranomaly

Deuteranopia

Protanomaly

Protanopia

Tritanomaly

Tritanopia

Excl.:

day blindness ( H53.1)

H53.6 Night blindness

Excl.:

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)

NCCS

DCS.VII.3 DCS.VI.2

Note:

For definition of visual impairment categories see table below.

Excl.:

amaurosis fugax ( G45.3)

H54.0 Blindness, binocular

NCCS

Comorbidity

Incl.:

Visual impairment categories 3,4,5 in both eyes

H54.1 Severe visual impairment, binocular

NCCS

Comorbidity

Incl.:

Visual impairment category 2.

H54.2 Moderate visual impairment, binocular

Incl.:

Visual impairment category 1

H54.3 Mild or no visual impairment, binocular

Incl.:

Visual impairment category 0.

H54.4 Blindness, monocular

NCCS

Comorbidity

Incl.:

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

NCCS

Comorbidity

Incl.:

Visual impairment category 2 in one eye and categories 0, 1 or 9 in other eye.

H54.6 Moderate visual impairment, monocular

Incl.:

Visual impairment category 1 in one eye and categories 0 or 9 in other eye.

H54.9 Unspecified visual impairment (binocular)

Incl.:

Visual impairment category 9.

Coding-Hint

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" (September 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 3/10 (0.3) 20/70
1 Moderate visual impairment	6/18 3/10 (0.3) 20/70	6/60 1/10 (0.1) 20/200
2 Severe visual impairment	6/60 1/10 (0.1) 20/200	3/60 1/20 (0.05) 20/400
3 Blindness	3/60 1/20 (0.05) 20/400	1/60* 1/50 (0.02) 5/300 (20/1200)
4 Blindness	1/60* 1/50 (0.02) 5/300 (20/1200)	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.