The lens in the eye helps to focus light rays onto the retina, which then sends visual information to the brain. This allows us to see objects clearly at different distances.
The lens is elastic and can change shape through a process called accommodation. When we look at distant objects, the lens becomes flatter, and when we look at closer objects, the lens becomes more rounded.
Yes, the lens can become damaged or diseased, leading to conditions such as cataracts, where the lens becomes cloudy, or presbyopia, where the lens loses its elasticity and makes it difficult to focus on close objects.
Yes, there are two types of lenses in the eye: the crystalline lens and the cornea. The crystalline lens is located behind the iris and helps with accommodation, while the cornea is the clear outer layer of the eye that also helps to focus light.
Yes, corrective lenses, such as glasses or contact lenses, can help to improve vision by compensating for any refractive errors in the eye, such as nearsightedness or farsightedness. Surgery, such as LASIK, can also correct these refractive errors by reshaping the cornea.