Disposable Contacts are worn for a specific period of time, then disposed of and replaced with fresh lenses. Disposable have become the most common type of contact lenses. At the time of your eye exam your Doctor will go through a replacement schedule. The replacement schedule refers to how often your lenses are discarded and replaced, that is, whether they are disposable, frequent replacement or reusable. The more frequently you replace your contact lenses, the healthier and more comfortable your eyes will be.
Extended Wear Contact Lenses may be the right option for you if you would like to wake up each day with clear vision. Extended wear lenses allow more oxygen to reach your cornea. Most extended wear lenses are FDA approved to be worn without removal for up to seven days. A newer type of soft contact lens material, silicone hydrogel is considered “super-permeable”, and some lenses from this material are approved for up to 30 days wear without removal. Silicone hydrogel contact lenses represent a breakthrough over traditional hydrogel soft contact lenses, because silicone lets so much oxygen (essential for a healthy cornea) pass through the lens. Today’s new silicone hydrogel contact lenses provide much more oxygen to the eye than most conventional soft contact lenses, making the 30-day extended wear a safer option than previously available.
Toric Contact Lenses for Astigmatism are for people who have astigmatism, usually an unequal curvature of their cornea so that it is shaped more like a football. Toric lenses have two powers in them, created with curvatures at different angles – one for astigmatism,the other for either myopia or hyperia. There is also a mechanism to keep the contact lens relatively stable on the eye when you blink or look around. To provide crisp vision, toric contact lenses cannot rotate on your eye.
With Monovision contacts you wear a contact lens on one eye to correct your distance vision and a contact lens on your other eye to correct your near vision. The lens for distance vision is usually worn on your dominant eye. Although monovision does not work for everyone, it is a good option for patients who have presbyopia. Monovision can help you achieve good, functional vision at distance and near. It is not “perfect vision” vision, however there is usually some compromise between clarity at distance or near to allow patients to fully adapt to monovison while at the same time providing adequately corrected vision.
Multifocal Contacts are bifocal contact lenses designed to provide good vision to people who have a condition called presbyopia. Bifocal contact lenses have two prescriptions in the same lens. Multifocal contact lenses have a range of powers similar to progressive spectacle lenses. Multifocal contact lenses work in several different ways, depending on the design of the lens. The designs fall into two basic groups:
- “Alternating vision” (translating) lenses are so named because your pupil alternates between the two powers, as your gaze shifts upward or downward.
- “Simultaneous vision” lenses require your eye to be looking through both distance and near powers at the same time. Although this might soundunworkable, your visual system learns to select the correct power choicedepending on how close or far you are trying to see.
Color Contact Lenses are available in plano form, as well as people who have astigmatism, or want a disposable contact lens. Colored contacts come in visibility tints, enhancement tints, and opaque color tints.A visibility tint is usually a light blue tint added to a lens, just to help you see it better during insertion or removal, or in case you drop it. Since it is a very light tint, it does not affect your eye color.
An enhancement tint is a solid but translucent tint that is darker than a visibility tint. It does not change your eye color, it enhances the existing color of your eyes. These type of tints work best for people with light colored eyes.
Opaque tints change your eye color completely. These type of tints work best for people with dark eyes who want to change their eye color completely. Opaque color contacts come in a wide variety of colors.
Rigid Gas Permeable (RGP) Contact Lenses are made of a firm, durable plastic that transmits oxygen. Because they do not contain water like soft lenses do, they resist deposits and are less likely than soft contacts to harbor bacteria. Since RGP contacts retain their shape better, they provide crisper vision than soft contact lenses. RGP contact lenses require a brief period of adaptation.