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Types
There are different types of cataract with different presentations. The most common type is nuclear sclerosis, where the center of the lens turns dense and yellow. Aside from gradual clouding of the vision, this age-related cataract often causes a shift in focus to near. People who use reading glasses or bifocals may find they no longer need them (second sight).
Posterior |
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This creates a blurring of distance vision, but near vision may still be possible if the object is held at the right distance.
With a posterior subcapsular cataract, the opacity is located at the
back surface of the lens. This type of cataract tends to come on quickly, and
is associated with more blurring and glare. It may be associated with
previous eye trauma, or steroid use.
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