H53-H54 Visual disturbances and blindness

 
Chapter VII

Diseases of the eye and adnexa
(H00-H59)

Visual disturbances and blindness
(H53-H54)

H53		Visual disturbances Latin: Disordines visuales
H53.0		Amblyopia ex anopsia Latin: Amblyopia sine anopsia
		Amblyopia: · anisometropic · deprivation · strabismic
H53.1		Subjective visual disturbances Latin: Disordines visus subjectivi
		Asthenopia Day blindness Hemeralopia Metamorphopsia Photophobia Scintillating scotoma Sudden visual loss Visual halos
		Excludes:	visual hallucinations (R44.1)
H53.2		Diplopia Latin: Diplopia
		Double vision
H53.3		Other disorders of binocular vision Latin: Disordines visus binocularis alii
		Abnormal retinal correspondence Fusion with defective stereopsis Simultaneous visual perception without fusion Suppression of binocular vision
H53.4		Visual field defects Latin: Defectus regionis visualis
		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 Latin: Dyschromatopsiae
		Achromatopsia Acquired colour vision deficiency Colour blindness Deuteranomaly Deuteranopia Protanomaly Protanopia Tritanomaly Tritanopia
		Excludes:	day blindness (H53.1)
H53.6		Night blindness Latin: Nyctalopia
		Excludes:	due to vitamin A deficiency (E50.5)
H53.8		Other visual disturbances Latin: Disordines visuales alii
H53.9		Visual disturbance, unspecified Latin: Disordo visualis, non specificatus

H54		Blindness and low vision Latin: Amaurosis et amblyopia
		Note:	For definition of visual impairment categories see table below.
		Excludes:	amaurosis fugax (G45.3)
H54.0		Blindness, both eyes Latin: Amaurosis bilateralis
		Visual impairment categories 3, 4, 5 in both eyes.
H54.1		Blindness, one eye, low vision other eye Latin: Amaurosis monocularis, amblyopia oculi alterius
		Visual impairment categories 3, 4, 5 in one eye, with categories 1 or 2 in the other eye.
H54.2		Low vision, both eyes Latin: Amblyopia bilateralis
		Visual impairment categories 1 or 2 in both eyes.
H54.3		Unqualified visual loss, both eyes Latin: Amaurosis bilateralis indefinita
		Visual impairment category 9 in both eyes.
H54.4		Blindness, one eye Latin: Amaurosis monocularis
		Visual impairment categories 3, 4, 5 in one eye [normal vision in other eye].
H54.5		Low vision, one eye Latin: Amblyopia monocularis
		Visual impairment categories 1 or 2 in one eye [normal vision in other eye].
H54.6		Unqualified visual loss, one eye Latin: Amaurosis monocularis indefinita
		Visual impairment category 9 in one eye [normal vision in other eye].
H54.7		Unspecified visual loss Latin: Amaurosis, non specificata
		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 10o but greater than 5o around central fixation should be placed in category 3 and patients with a field no greater than 5o around central fixation should be placed in category 4, even if the central acuity is not impaired.

Category of visual impairment	Visual acuity with best possible correction
	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

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