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SCLERAL
CONTACT LENSES
FOR KERATOCONUS
Many optometrists and ophthalmologists recommend scleral contact lenses for a variety of hard-to-fit eyes, including eyes with keratoconus.
In early keratoconus, a standard GP lens may be used. However, if the lens does not center properly on the eye or moves excessively with blinks and causes discomfort, switching to a large-diameter scleral contact lens may solve the problem.
Scleral lenses are designed to vault the corneal surface and rest on the less sensitive surface of the sclera, these lenses often are more comfortable for a person with keratoconus. Scleral lenses are designed to fit with little or no lens movement during blinks, making them more stable compared with traditional corneal gas permeable lenses.
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What is a Scleral Lens?
A scleral lens is a specialized contact lens used to manage a variety of eye conditions.It is made of a plastic that is clear and rigid, yet the material allows the eye to breathe, keeping it healthy.
A scleral lens is slightly larger than most soft contact lenses and is designed to rest on the white (less sensitive) part of the eye called the sclera. That is why it’s called a scleral lens!
This unique design makes the lens very comfortable to wear, all day long.
How does Scleral Lens Work?
The eye is very similar to a camera – the cornea and lens of the eye (camera lenses) focus light to the retina (the film). In order for your visual system to properly process images, the eye requires a smooth surface – and the smoother the surface, the clearer your vision.
Just like smudges on a camera lens, an irregular cornea will negatively impact your vision. A scleral lens is made of a stiff, yet thin, plastic that fits over the cornea, providing a smooth surface for the eye.
This allows the eye to focus better, improving your vision. Additionally, a scleral lens is designed to hold a reservoir of fluid against the eye. This provides constant moisture to the ocular surface, making the lens very comfortable to wear.
