Contact Lenses, also known as just contact lenses, are tiny thin lenses usually placed directly on your eye’s surface. Contact lenses have become an important medical device worn by more than 150 million individuals around the world, and they are used to correct vision, either for therapeutic or cosmetic reasons. Lenses also are commonly worn in sports to allow athletes to focus on their sport and help them perform at their best. They are available in many different styles, sizes and colors to fit the individual’s needs and preferences.
The major difference between daily wear lenses and disposable lenses is that the former can be worn daily while the latter are only meant for being discarded after one or two nights. Some daily wear lenses are even approved for overnight wear and re-use. They are also designed to fit each person’s individual eye and come in a variety of colors and styles to help the wearer to customize their look.
The primary material used to design contact lenses is polycarbonate, which offers high resistance to impact and other substances that can damage eye tissues. There are also soft contact lenses made from silicon hydro gel, which is water-resistant and helps protect against dryness and cracking of the eye’s cornea. Gas permeable lenses (also called non-permeable lenses) provide more oxygen to the eye than soft contacts do, but they tend to leave a sticky residue on certain surfaces and can slip out of the eye during physical activity. There are also protein and plastic composite materials that are used to construct the contact lenses, and the most common type of these is silicone hydrogel, which is biocompatible and has greater stability than the protein based composites.
Contact Lenses for Astigmatism: There are a number of different types of contact lenses that correct astigmatism, including toric contact lenses that are designed to be worn for longer periods of time. They are generally available in a choice of colors, including green, blue, gray, brown, or even black. Some manufacturers also produce custom-made astigmatism contacts to order, while others sell in single color units. These units are often more expensive because they are also specially made for the eye. They may also cost more to buy as daily disposable contacts because you have to discard them after a certain period of time, whereas the daily disposables will remain in the eye until they are properly removed.
Farsightedness and nearsightedness affect people in many different ways. For many people, wearing glasses is the only way to correct their problems. But for others, it may be more convenient or practical to wear contact lenses – at least initially. Wearing corrective lenses does not have to be cumbersome, especially if the lenses are prescribed by an expert optometrist. The variety of styles and designs makes it easy to find something that suits your individual needs.
If you suffer from dry eyes or astigmatism, you should first see your eye doctor to determine if this condition is treatable using contact lenses. There are ways to help you solve these problems before you ever wear a pair of lenses. If you suffer from dry eyes, the contact lens can sometimes help to lubricate the eye so the eye can function more normally. And if your astigmatism is severe, your optometrist might recommend that you wear eyeglasses instead of contact lenses. This can get you a better fit and make your vision clearer. However, you should still see your eye doctor so you can discuss whether you are a candidate for glasses or contacts, particularly if your dry eyes or astigmatism make glasses impossible or inconvenient for you.