If you are wearing eyeglasses and you want to switch to contacts, there are certain things you need to check with your doctor before you make the switch.
There are different materials that contact lenses are made of. There are soft lenses made from hydrogel and they will easily conform to the surface of the eye. There are silicone hydrogel contact lenses that offer more porosity so that more oxygen can reach the cornea. Gas permeable lenses are quite rigid and they fit more closely to the eye. You will be able to enjoy sharp vision with these lenses when compared to soft lenses. The benefits of gas permeable lenses and soft lenses have come together in hybrid contact lenses.
But it can be difficult to fit these lenses and they are also quite expensive. Another lens type is PMMA lenses and they provide a high level of optics. However, they will not help in transmitting oxygen to the eye and it will take you some time to get used to them.
Toric lenses are used as contact lenses for astigmatism and they are constructed in order to provide a good solution to this issue. They have a unique shape that can help correct astigmatism. You can be guaranteed the visual acuity provided by these toric lenses as it is very consistent in their performance. However, you need to make sure that they fit accurately as otherwise it will not improve your vision.
If you are wearing contact lenses, you need to know when to dispose of them and replace them with new ones. The daily disposable lenses are only good for a day so you will need to replace them each day. There are also disposable lenses that you can discard after two weeks. Frequent replacement lenses can be disposed of monthly and if you are looking for a lens that will be good for about six months, you can go for traditional or reusable lenses.
There are different designs for contact lenses as well. There are multifocal lenses that will have several power zones to correct near and far vision. Toric lenses can correct farsightedness or nearsightedness in addition to astigmatism. Bifocal contact lenses are used for astigmatism as well. The contact lenses that you will have heard of most often are cosmetic contact lenses that will change your eye colour or brighten your existing eye colour. There are contact lenses that will reduce dry eye symptoms. These are mostly soft contact lenses.
There are also lenses that are used for special effects. If your eye is disfigured, you can use prosthetic lenses that will match your other eye. These can be custom designed based on your requirement. If you have a uniquely shaped eye that affects the use of general contact lenses, you can get custom lenses made. Some lenses also have UV inhibiting properties that will protect your eyes from harmful rays and reduce the risk of cataracts.