macular degeneration

macular degeneration



:  a gradual loss of the central part of the field of vision usually affecting both eyes that occurs especially in the elderly and that in a slowly progressing form is marked especially by accumulation of yellow deposits in and thinning of the macula lutea and in a rapidly progressing form by scarring produced by bleeding and fluid leakage below the macula lutea



macular degeneration

noun    (Medical Dictionary)

Medical Definition of MACULAR DEGENERATION

: progressive deterioration of the macula lutea resulting in a gradual loss of the central part of the field of vision; especially : age-related macular degeneration

macular degeneration

noun    (Concise Encyclopedia)

Degeneration of the macula (central part of the retina), with corresponding visual-field defect. It is the leading cause of blindness in old age. Probably due to reduced blood circulation, it is now known to have a genetic component. It is twice as common in smokers as in nonsmokers, and it is also correlated with lifelong sun exposure. Peripheral vision usually remains, but loss of central visual acuity makes reading or fine work difficult or impossible, even with special magnifying eyeglasses. Some forms of macular degeneration can be halted (but not reversed) by laser surgery.


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