Scleral Lenses
Specialised corrective hard contact lenses

Over the past few years scleral contact lenses have become very popular. These are rather large lenses that at first may seem a little intimidating.

They are rigid, made of highly gas permeable materials, and are surprisingly comfortable to wear.The lenses are designed to vault the cornea, the front surface of the eye, and rest on the sclera, the white of the eye.

Because the center of scleral and semi-scleral lenses vaults over the irregularly shaped cornea, these lenses don't apply pressure to the eye's cone-shaped surface for a more comfortable fit.
These larger lenses also are more stable than conventional gas permeable contact lenses, which move with each blink because they cover only a portion of the cornea.

Typically they are fitted on highly irregular corneas and on people with conditions like kerataconus. They do require highly specialised fitting, and thorough follow up to ensure that there are no complications. These lenses must be replaced annually. Scleral lenses. These are large-diameter gas permeable contacts — large enough that the periphery and edge of the lens rest on the "white" of the eye (sclera). Scleral lenses cover a larger portion of the sclera, whereas semi-scleral lenses cover a smaller area. Because the center of scleral and semi-scleral lenses vaults over the irregularly shaped cornea, these lenses don't apply pressure to the eye's cone-shaped surface for a more comfortable fit. These larger lenses also are more stable than conventional gas permeable contact lenses, which move with each blink because they cover only a portion of the cornea.