There are several types of contact lenses: 1. Soft Contact Lenses: These are the most common type of contact lenses. They are made of a soft, flexible plastic material that allows oxygen to pass through to the cornea. Soft lenses are comfortable to wear and come in various options such as daily disposables, bi-weekly disposables, and monthly disposables. 2. Gas Permeable Contact Lenses: Also known as rigid gas permeable (RGP) lenses, these are made of a firm plastic material that allows oxygen to reach the cornea. RGP lenses provide sharper vision and are more durable than soft lenses. They are often used for correcting astigmatism and other vision problems. 3. Toric Contact Lenses: Toric lenses are designed specifically to correct astigmatism. They have different powers in different meridians of the lens to compensate for the irregular shape of the cornea in astigmatism. 4. Multifocal Contact Lenses: Multifocal lenses are used to correct presbyopia, a condition that affects near vision as people age. These lenses have multiple zones with different powers to provide clear vision at various distances. 5. Colored Contact Lenses: Colored lenses are available both with and without vision correction. They can enhance or change the color of your eyes for cosmetic purposes. Some colored lenses are designed to mimic the natural appearance of the iris. 6. Orthokeratology Lenses: Orthokeratology (Ortho-K) lenses are specially designed to reshape the cornea overnight. They are worn during sleep and temporarily correct nearsightedness, allowing clear vision during the day without the need for glasses or lenses. 7. Scleral Contact Lenses: Scleral lenses are large, gas permeable lenses that vault over the entire cornea and rest on the sclera (white part of the eye). They are used for irregular corneas, such as in cases of keratoconus or severe dry eye syndrome. It's important to consult with an eye care professional to determine the most suitable type of contact lenses for your specific needs.