ABSTRACT
The most cellular structure of the human body, the crystalline lens, is affected by a limited number of diseases. Apart from opacification of the lens (cataract formation), any other disease is relatively uncommon. The comparative rarity of abnormalities in the lens, for both acquired and inherited diseases, is mainly a result of its avascularity. Anomalies of the transparent crystalline lens include changes in its position (ectopia lentis), shape (lenticonus), size (microspherophakia), and absence of the lens (aphakia). These features will be discussed in this order.
