Spring is the time of year when the department gets the most calls regarding supposedly abandoned or orphaned animals. As biologists have learned, usually these animals arenât orphaned at all. Often, overeager individuals ârescueâ the animal while the mother is foraging. The walrus pup before transport to Sea World.
Nuclear Sclerotic Cataracts. This is the most common type of age-related cataract, caused primarily by the hardening and yellowing of the lens over time. Nuclear refers to the gradual clouding of the central portion of the lens, called the nucleus; sclerotic refers to the hardening, or sclerosis, of the lens nucleus.
doctors refer to nuclear cortical and posterior subcapsular cataracts depending on the layer of the lens involved in many cases cataracts are age related appearing first when a person is in his or her 40s or 50s but not affecting vision until after age 60 in other cases cataracts may be related to eye trauma long term diabetes corticosteroid medications or radiation treatments