Medical Health Encyclopedia

Cortical Cataracts. Cortical cataracts usually start on the outside of the cortex (the outer area of the lens).

• They have very little initial effect on vision.
• Glare can develop as these cataracts increase and approach the center of the lens.
• Problems with distance vision, contrast sensitivity, and clarity may occur as the cataracts progress further.

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Posterior Subcapsular Cataracts. Posterior subcapsular cataracts typically start near the center of the back part of the capsule surrounding the lens. These cataracts often advance rapidly. For many patients, major impairment of eyesight, including near-vision problems and glare, develops within several months.