Contact Lenses: A Brief Overview
Contact lenses are thin, curved lenses placed on the film of tears that covers the surface of the eye. They are designed to correct refractive errors and improve vision, similar to eyeglasses. There are two main types of contact lenses: hard and soft. Hard lenses are less common and are typically used for specific eye conditions, while soft lenses are the most popular choice for vision correction. Contact lenses can also be used for cosmetic purposes, such as changing the color of the eyes or creating special effects. They are considered medical devices and require a prescription from an eye care professional. It is important to follow proper hygiene and care practices to avoid potential complications, such as eye infections and corneal ulcers. Contact lenses have evolved over time, and modern options include toric lenses for astigmatism, spherical lenses for nearsightedness and farsightedness, as well as multifocal lenses for presbyopia. With millions of people worldwide using contact lenses, they continue to be a popular and effective alternative to traditional eyeglasses.
