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What are scleral lenses?
Scleral lenses are large hard contact lenses. This lens is so named because it is fitted to the sclera (white of the eye). This makes it possible to bridge the cornea.
Scleral lenses rest on the sclera but do not touch the cornea; this is called a touch-free pass. This prevents the sensitive tip of the cone from being damaged by the scleral lens. Due to the size of this lens, the edges sit well below the eyelids, so the edges are barely felt.
The scleral lenses of the Keratoconus Center in the Netherlands have been optically improved with Conepower technology . This reduces ghosting (shadows and ghosts) seen with one eye.
Conepower technology not only improves vision, but also contrast sensitivity and reduces halos and starburst. The Keratoconus Center in the Netherlands is therefore the first and only optometric center that has this technology.
Benefits of scleral lenses
- They are also suitable for severe forms of keratoconus.
- The scleral lens does not touch the top of the cone.
- Due to the stable position on the eye, a scleral lens can be combined very effectively with Conepower technology.
- No dust can get under this lens.
Disadvantages of scleral lenses
- They are difficult to deploy and remove, especially in the early stages.
- They are more expensive to maintain than other types of contact lenses.
- The lens rests on the mucous membrane of the eye that covers the sclera. This mucous membrane is often more sensitive to allergies in people with keratoconus. The pressure of the lens on this mucous membrane and/or the contact lens fluids can cause an allergic reaction.
Innovation of scleral lenses:
- The materials used are more permeable to oxygen, which puts less stress on the cornea.
- The development of the mini scleral lens has made fitting and wearing scleral lenses much easier.
- Modern lathes give a smoother finish to scleral lenses, which means less friction on the eyelids.
- An innovative edge finish of the landing zone ensures that scleral lenses are no longer aspirated.
- The fit can be adjusted in four different quadrants.
- Better contact lens solutions clean the material better and reduce the risk of allergic reactions.
- Cone power technology