RGP lenses are still probably the most widespread form of correction for Keratoconus, so why are these lenses so profitable and what are the downsides to them?
Keratoconus can be a illness with the cornea, which is the clear front surface of the eye. In people with Keratoconus the cornea thins and distorts outwards into an irregular ‘cone’ shape.Uggs On Sale
It’s this distortion or the eye that outcomes in reduced vision as the light entering the eye can not be appropriately focused onto the retina and this causes blurring and ‘ghosting’.
Spectacles and soft get in touch with lenses (Hydrogels) are of limited use for much more advanced Keratoconus as they don’t right the distortion in the eye.
Glasses cannot be aligned effectively to deal with the numerous concentrate points caused by the irregular shape and soft lenses often be thin and contour to the same shape as the cornea (though you can find some thicker soft lenses which are greater at keeping their very own shape and for that reason go someway towards the advantages of RGP lenses).
RGP or Rigid Gas Permeable contact lenses are tiny lenses, typically slightly smaller in diameter than the coloured part of your eye.
As the name suggests they’re rigid, they’re also occasionally described as hard lenses.Jordan 11
Since they are rigid they keep their very own shape when fitted towards the eye. Due to this they also trap a layer of fluid (tears) between the surface in the corneas and also the get in touch with lens.
The mixture of your cornea, the fluid as well as the RGP lens forms a single refractive surface that. To all intents and purposes, is like an artificial cornea. This artificial cornea has a normal shape and is able to direct light so that it might be focused correctly on the retina. Blurring and ‘ghosting’ are removed, or no less than decreased, and vision is improved.
Needless to say you’ll find some downsides to RGP lenses.
Their rigid nature makes them less comfortable than soft lenses. This can be because of pressure on the cornea or because of the edge from the lens rubbing on the inner surface with the eyelid.
They’re also more prone to discomfort in dry or dusty circumstances..
Exactly where the curve of the cornea is really steep the lens balances on the eye having a large gap about the edge. Consider balancing a shallow bowl on the finish of a rugby ball. This can make the edge even more prominent, which naturally reduces the comfort level and also make it much simpler for the lens to be dislodged and lost.
In spite of these downsides the majority of people with Keratoconus will get very good correction with RGP lenses and they are surely worth persevering with.
If you’re new to them they could take some time to acquire employed to, and it could be essential to ‘build up’ the time you wear them over numerous weeks.Uggs On Sale
Obviously RGPs are not the only option and other make contact with lens solutions might be employed if RGPs don’t function for you. These contain Scleral lenses, Hybrid lenses and Piggyback solutions.