Ophthalmology and Vision Science

Contact Lens and Refraction

To help you see better, contact lenses are little, transparent discs that you wear in your eyes. On the tear film that protects your cornea, contacts float.
Contact lenses are used to treat refractive defects that affect vision. When the eye does not properly bend or focus light into the eye, this is known as a refractive error and results in a blurry image.

For those with the following refractive defects, contacts can enhance vision:

Myopia (nearsightedness) (nearsightedness)
hyperopia (farsightedness) (farsightedness)
astigmatism (distorted vision) (distorted vision)
presbyopia (changes to near eyesight that generally occur with ageing) (changes to near vision that normally happen with age)

Contact lens categories: Numerous types of plastic are used to create contacts.

Hard-wearing contact lenses come in two main categories: hard and soft. Hard-wearing contact lenses are rigid gas-permeable (RGP) lenses, the most common kind of hard contact lens. Most often, plastic and other materials are used to make these lenses. They firmly maintain their shape while allowing oxygen to reach your eye through the lens. RGP lenses are particularly beneficial for those who have keratoconus and astigmatism. This is because, in cases when the cornea is unevenly bent, they offer vision that is sharper than soft lenses. RGP lenses may also be preferred by those with allergies or contact lens protein deposits.

soft contact lenses. The majority of people opt to wear soft contacts. This is because there are many possibilities, and they often tend to be more comfortable.