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Research on using RGP (Hard) contact lenses  to control Myopic Progression

A Randomized Trial of the effects of Rigid Contact Lenses on Myopia Progression

Jeffrey J. Walline, OD, PhD; Lisa A. Jones, PhD; Donald O. Mutti, OD, PhD; Karla Zadnik, OD, PhD

Arch Ophthalmol. 2004;122:1760-1766.

This well respected research looked into the claim that conventionally designed rigid gas-permeable contact lenses (RGP) could control the development of myopia (shortsightedness) in children better than soft contact lenses.

The study concluded that conventionally designed RGP contact lenses did indeed slow the rate of change in corneal curvature in myopic children. The results showed the best gains were achieved in the first year, but also shows that controlling the corneal curve change was not the complete answer, because axial length of the eye continued to change.
We know that control of peripheral retinal blur is another important part of controlling the triggers to lengthening of the eye. Ortho K lenses provide this extra aspect which is why Ortho K is th recommended way to control Myopic Progression.

Click here to read the research