Graham A Lee
Ocular disease in its early stages may be asymptomatic and
insidious. Three of the leading causes of visual loss are cataract,
age related macular degeneration and glaucoma.
This article discusses the presentation and treatment options
for, and the management of, cataract, age related macular
degeneration and glaucoma.
Few primary prevention strategies are available as these ocular
diseases are degenerative. The focus for reduction of visual
loss is early detection and regular ophthalmic examination. The
aim of management is to improve or maintain vision so as to
preserve patient quality of life.
Vision loss can be defined in two categories of severity: ‘legal blindness’ and ‘visual impairment’. Legal blindness is defined as ‘a visual acuity (VA) worse than 6/60 and/or a visual field of <10 degrees in the better eye’. Visual impairment is defined as ‘a VA worse than 6/12 and/or a visual field of <20 degrees in the better eye or a homonymous hemianopia’.1
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