NSE 22A/B Chapter Notes - Chapter 1: Intraocular Lens, Diabetic Retinopathy, Slit Lamp
18 Apr 2020
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Document Summary
What is cataract: most cataracts are a result of aging, usually forming after age 70. Age-related degeneration of the lens fibers result in the breakdown of molecules small enough to exert osmotic effects and attract water into the lens. This causes a clouding and may interfere with light transmission. chemical changes in the lens that is normally transparent to become cloudy -- this causes cloudy vision in the patient. Clinical manifestations: decrease in vision glare ( due to the opacity of the lens, light scatters)- reported to be worst at night abnormal colour perception. Complications of cataract: opacity of the lens could cause difficulties for the ophthalmologist in visualizing the retina ( this is esp bad for pt with diabetic retinopathy or sight threatening pathological conditions) Collaborative care: conservative therapy there is currently no cure but surgical removal is available, prescription change in glasses increased lighting strong reading glasses or magnifiers.
