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Glaucoma
is a symptomatic condition, not a disease. The characteristic
physical sign is increased intra ocular pressure (IOP). A
sustained increase in IOP may be due to an increase in the
formation of the aqueous humour, a difficulty in its exit
or a raised pressure in the episcleral veins. Increase in
IOP causes pathological changes in the optic disk and typical
defects in the field of vision and eventually blindness.
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