D. Glaucoma
1. Definition, epidemiology, & etiology
Glaucoma, a condition of optic nerve deterioration associated with elevated intra-ocular pressure, is diagnosed in 1 to 2 million Americans; but it is estimated to affect 3 to 4 million. 1.6 million Americans suffer impaired vision resulting from glaucoma damage to their optic nerve, of whom 150,000 are blinded. Blindness from glaucoma is more prevalent than from diseases such as age-related maculopathy, cataract, optic nerve atrophy, and ocular trauma. The damage affects peripheral vision first, but eventually destroys central vision if left untreated. If detected early enough, most cases are manageable by medical and surgical modalities, and further damage and vision loss is preventable.
2. Treatment: medication, lasers, surgery
Treatment for glaucoma usually begins with medical eyedrops, including beta-blockers (orange cap), miotics (green cap), prostaglandin analogues (white cap), carbonic anhydrase inhibitors (orange cap) and alpha agonists (white/purple cap). If these do not adequately control intraocular pressure, a laser procedure to increase fluid outflow is sometimes necessary. Surgical procedures are usually successful, but generally attempted only after laser and medications have been tried.
3. FAQ
4. Warning signs, risk factors, and symptoms
Despite the devastating effects of glaucoma, its symptoms are often unnoticed until extensive visual field damage has occurred. Patients with primary open-angle glaucoma (POAG), the most common form of glaucoma in the US, experience no pain or unusual visual phenomena, and frequently seek examination only when their progressive visual field damage assumes near-total proportions, encroaching on their central vision. African-Americans or people with a family history of glaucoma should check their eyes yearly after the age of 40. If no-one in your family has had glaucoma, you should have your eyes checked by an optometrist or ophthalmologist yearly after the age of 50.
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E. Eye care outside the office: instructions for medications and refills
It is extremely important that you follow your prescription schedule. Glaucoma is usually a slow-acting disease, so long-term adherence to your medication regimen is necessary. You should contact your pharmacy before your eyedrops run out to request a refill. Please remember to call your pharmacy during the Glaucoma InstituteÕs business hours, as they will need to contact us for approval of your prescription.
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