What is meant by cortical cataract.?

Cortical cataract: The "cortex" of the natural lens is a layer just inside the lens capsule. Deeper is the nucleus, or main body of the lens. A cortical cataract is a clouding of the cortical layer, usually across the front of the lens. This can cause glare, but is sometimes not bothersome. It can extend across the back of the lens, which affects the vision more. If the vision is impaired, cataract surgery can help.

Sparing the nucleus: Cortical cataracts are in a layer of the lens outside of the nucleus which is the center of the lens. They are sometimes congenital. Depending upon the density they may disturb the vision but sometimes are thin enough not to be a problem. All cataracts can be removed with highly successful surgery if the vision is disrupted.

Cortical cataract: Changes in the peripheral crystalline lens which extend toward the center are calked cortical cataracts. These are often seen with diabetes and cause decreased vision, glare, and haloes.

Cortical Cataract: There are three main types (parts of the natural lens that turn cloudy) cataracts. Nuclear the nucleus (central portion) Cortical the portion around the nucleus called the cortex Posterior sub-capsular the very back surface of the lens up next to the posterior capsule.

Cortical cataract: The lens: usually clear, behind iris; is like a "pillow in a pillowcase". When cloudy/white & affecting vision, surgery needed. Goal: remove top part of pillow case (anterior capsule), remove pillow (cataract), keep back pillow case intact (posterior capsule), place a new lens; Cortical: outer peripheral part of lens is cloudy. More info: eyedoc2020.blogspot.com