
The crystalline lens is a transparent, flexible structure located directly behind the iris and in front of the vitreous body. Its primary function is to focus light onto the retina, allowing for clear vision at different distances. The lens changes shape (a process called accommodation) to adjust focus between objects that are near and far. Over time, the lens can lose its flexibility, leading to presbyopia (difficulty focusing on close objects), and it can become cloudy, leading to cataracts.
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