Types of Contact Lenses Offered by a San Antonio, TX Optometrist
Our optometrist at Mi Vision Eye Care, serving San Antonio, TX and the surrounding area, offers the option of either prescription glasses or contact lenses or both. Contacts are an excellent alternative to glasses for people who play sports or just don't want to be bothered with the hassle of wearing glasses. Contact lenses also are more aesthetically pleasing for many. However, not all contact lenses are the same; therefore, you should educate yourself about the different types available including soft lenses and hard lenses.
Soft contacts also referred to as disposable contacts, are the more comfortable option. They're comprised of hydrophilic plastic, meaning a plastic that loves water. Their composition keeps them pliable, so they bend and form with your eye, so you can't feel them when you're wearing them. Not to mention, the material allows some oxygen to pass through, so your eyes receive the oxygen they need. Hydrogel contacts made of silicone allow more oxygen to pass through and reach your eye than most soft lenses on the market today. You can purchase soft lenses that are daily, weekly or monthly lenses, which describes the amount of time you can wear one pair of the contacts before you should dispose of them. Soft contacts tend to be the cheapest contact option. Daily lenses are the cheapest of all disposable lenses while monthly and extended-wear contacts (overnight) are the most expensive soft contact varieties.
Gas Permeable Lenses
Gas permeable contacts, also known as rigid or hard contacts, tend to consist of fluorine and silicone, which allows oxygen to reach the eye. However, these contacts aren't as soft and pliable as disposable contacts because they must maintain their shape to correct your vision. This kind of lens doesn't contain a high concentration of water like soft lenses do; instead, they rely on their porous nature to transmit oxygen. Gas permeable lenses are worn at night while you sleep, and then you take them out when you wake up. You undergo a more intricate sizing process known as orthokeratology for rigid lenses. The contacts work by reshaping your corneal while you sleep in order to correct refractive errors like astigmatism. Generally, these contacts provide you with sharper vision correction than soft contacts.
Toric lenses are special soft contacts designed to correct astigmatism. The shape of a toric lens differs from a traditional spherical lens since it's the shape of a sliced donut as opposed to a sliced beach ball. The shape of the lens gives it unique focusing powers at different angles.
Visit Our Optometrist in the San Antonio, TX area Today
To schedule an appointment for a contact lens consultation or examination, contact us at Mi Vision Eye Care, serving San Antonio, TX and the surrounding area, by calling (210) 923-2020 today.