A postsubcapsular cataract usually starts as a small opacity of the back of the lens. This type of cataract develops slowly, and significant symptoms may not occur until the cataract is well developed. A subcapsular cataract causes light to scatter when it passes through the lens, which decreases the amount of light reaching the retina. If left untreated, these symptoms may increase in severity, eventually leading to major vision loss that can only be restored through surgery.
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