15 May 2009GLAUCOMA – DESCRIPTION
The defect in vision usually affects the inner or nasal side and this loss is often not noticed because it falls into the binocular area covered by both eyes.
Later it may involve the outer area and so lead to “tunnel vision”, where it appears the vision is reduced to seeing straight ahead as if one were looking through a tunnel.
The visual loss may not involve the central area and so the person may still appear to have good vision with or without correcting glasses. Being unaware of the progressive loss, the sufferer may see no need to have his eyesight checked.
As in acute glaucoma, haloes may be seen on looking at bright lights. This phenomenon can occur in any condition which gives rise to oedema of the cornea. Once diagnosed, chronic glaucoma can usually be brought under control.
Pilocarpine has been the mainstay of treatment. It is instilled into the affected eye several times a day, constricts the pupil and so prevents the bunching up of the colored iris into the corner of the eye where the duct to drain away the fluid from the chamber behind the cornea is.
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