As we approach the age of 40, the lens gradually hardens and eventually, the ability to read without bifocals or reading glasses is lost. The problem begins with only slight fuzziness when reading and gradually becomes more significant when it levels out at around age 50. At roughly that age, the lens often begins to yellow slightly and vision can change as the lens swells slightly and changes shape. Throughout our 50 s, slight changes in vision occur due to changes in the lens, and as it swells and narrows the outflow channel for fluid flowing through the eye, a form of narrow angle glaucoma can develop. As the yellowing worsens, so will vision until glare, reading problems, and diminished vision make removal of the cataract a practical necessity at around age 55 to 70.
Cataracts develop in almost everyone sooner or later.
According to a study by the American Academy of Ophthalmology, about one half of all people between the ages of 52 and 64 have a cataract. Last Updated on August 28, 2001.