When an Orthokeratology
/ Paragon Corneal Refractive Therapy™ lens is
inserted overnight, the central part of the retainer
lens (which covers the pupil) exerts a gentle moulding
effect on the surface cells of the cornea (the epithelium).
This causes the epithelium to flatten, and thin slightly,
which changes the refractive power of the cornea. It
is this change in corneal shape & power that corrects
the short-sightedness.
Clear Daytime Vision
Once the retainer lens is removed in the morning,
the vision is clear.
Reversible
The flat corneal shape very slowly reverts back to
its normal shape, but normally only at a rate of -0.25D
per day. If the lens is permanently removed, then the
prescription will eventually revert back to the normal
pre-treatment prescription over the course of a few
weeks. The beauty of this procedure is that it is fully
reversible & adjustable to cope with any changes
in prescription in the future.
Safety
There is no evidence in scientific literature to suggest
any permanent changes or damage to the cornea, making
it a very safe, non-invasive method of vision correction
when compared to laser surgery.
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