A kontakt lens, commonly known as a contact lens, is a thin, curved lens placed directly on the surface of the eye. They are designed to correct vision problems such as nearsightedness, farsightedness, and astigmatism. Contact lenses can also be used for cosmetic purposes, allowing wearers to change their eye color or appearance. Contact lenses come in various types, including daily disposables, which are worn for a single day, and extended wear lenses, which can be worn overnight. Proper care and hygiene are essential to prevent eye infections and ensure comfort while wearing kontakt lenses.