scleraalilinsssejä

Scleral lenses are large-diameter rigid gas permeable contact lenses that vault over the entire cornea and rest on the sclera, the white part of the eye. This design creates a fluid-filled reservoir between the back of the lens and the corneal surface. They are typically used to correct complex vision problems, especially those associated with irregular corneas, such as keratoconus, pellucid marginal degeneration, and post-surgical ectasia.

The primary advantage of scleral lenses is their ability to bypass the irregular cornea, providing a smooth refractive surface for clear vision. The fluid reservoir also helps to lubricate and protect the ocular surface, making them a therapeutic option for individuals suffering from severe dry eye disease, graft-versus-host disease, and other ocular surface conditions. Their larger size and resting position on the sclera generally contribute to greater comfort and stability compared to smaller rigid gas permeable lenses.

The fitting process for scleral lenses is specialized and requires an experienced eye care professional. It involves precise measurements of the cornea and sclera to ensure proper lens fit and vault. While generally safe and effective, potential complications can include lens awareness, discomfort if not fitted correctly, and in rare cases, issues related to oxygen transmission or tear exchange. Regular follow-up appointments are crucial for monitoring eye health and lens performance.