Glaucoma
Group of disorders characterised by increased intraoccular pressure atrophy and damage of optic nerve and retinal ganglion cells loss of visual fields
Primary glaucoma:
• open angle (also chronic, simple, wide angle)
• angle closure (also acute, narrow angle)
Secondary glaucoma:
Occurs in uveitis, trauma, drugs (eg corticosteroids), diabetes, venous occlusion
Aetiology:
• Open angle glaucoma – from degenerative changes that block flow of humor from eye increased pressure
• Angle closure glaucoma – obstruction of outflow of humor due to an anatomically narrow angle between iris and cornea causes sudden increased in intraocular pressure
Treatment:
• Open angle – need to reduce pressure (beta-adrenergic blockers); laser trabeculoplasty
• Angle closure – emergency
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