Soft Contact Lenses
Soft contact lenses are made of a light foldable plastic material. They allow oxygen through the lens and into the eye and drape softly over the cornea (the clear anterior surface of the eye). These lenses are easy to adapt to, and can correct for a large variety of prescriptions.
If you have a large amount of astigmatism, your Doctor may prescribe a "Toric Contact Lens"
Toric Contact Lenses
Toric contact lenses are able to correct both your overall prescription and your astigmatism.
Astigmatism is when the eye is shaped like a "football" rather than a "basketball", meaning that instead of being perfectly spherical, the eye has two different prescriptions in two different axes. Astigmatism is a non-pathological condition. Astigmatism is normal and doesn't affect the health of the eye. It is just a different shape!
Toric contact lenses can correct these two different prescriptions in one lens, providing clearer vision for those with astigmatism.
Monovision Contact Lenses
Monovision is a way to correct vision at distance and at near for people with presbyopia. Presbyopia is when those over 40 years of age need to wear reading glasses.
Monovision corrects the dominant eye for distance vision, and corrects the non-dominant eye for near vision. The brain is able to puts the two images together so you can see at distance and at near.
Multifocal Contact Lenses
Multifocal contact lenses offer a person with presbyopia the opportunity to correct both distance and near vision in both eyes.
The multifocal lenses focus light in two different planes called "simulaneous viewing", one for distance vision and one for near vision. The brain is able to choose which image use when focusing at distance or at near.
Rigid Gas Permeable Contact Lenses
Rigid gas permeable contact lenses (RGP) are made of a durable rigid, oxygen permeable plastic. They can come in many sizes but all are smaller than the iris (the colored portion of your eye), and they sit gently on a layer of tears that is in front of the cornea (the clear anterior surface of the eye).
RGP lenses have the unique ability to mask a multitude of visual irregularities due to corneal astigmatism, corneal scarring, conditions of the cornea including keratoconus, post-surgical abnormalities, and many more.
The tear film is what makes the vision so clear when wearing RGP lenses. Below the RGP lens, tears fill in anterior surface irregularities and create essentially a "new"corneal surface that is smooth and allows light rays to hit the retina in a straight line. Even people with no corneal issues can benefit from the intense clarity of these lenses.
Hybrid Contact Lenses
Hybrid contact lenses combine the visual clarity of a rigid gas permeable lens with the comfort of a soft contact lens. The word hybrid is a perfect description of these lenses because essentially, the two lenses are combined, including an rigid gas permeable contact lens in the center of the lens and a soft plastic "skirt" in the periphery.
Scleral lenses are a unique type of lens made of an oxygen-permeable rigid plastic that is filled with a sterile saline solution before being placed onto the eye.
The term "contact lens" is not-applicable to this type of lens because there is no contact with the cornea (the clear anterior surface of the eye). This type of lens lands on the white portion of the eye, the sclera.
The space between the cornea and the lens is filled with saline, providing moisture to the cornea all day long, and has the ability to mask corneal irregularities, abnormal conditions, and very highly diseased eyes.