Cataracts
Cataracts are generally associated with aging. Most occur after the age of 60. The otherwise transparent crystalline lens become opaque. This grayish clouding is perceived as a veil or mist that becomes thicker as time passes. The opacity is caused by changes in the protein molecules inside the lens cells. This opacity continues and eventually leads to the loss of sight in the affected eye. At the same time, the eye becomes much more sensitive to glare.
Since cataracts are irreversible, the whole lens is removed in cataract surgery and replaced by an artificial lens with the same refractive power.
