Comparing Myopia Control Efficacy in Children With 4 Methods: Orthokeratology, DIMS, DISK, and SVS.

Orthokeratology is to a rigid contact lens with reverse design to flat the central cornea to correct the myopia, which is to use at night during sleep; DIMS and SVS are both spectacles to wear at daytime; DIMS has many tiny lenses at peripheral of the big lenses to make the peripheral retina myopic defocus during the daytime; SVS has only one focus while DIMS has many focuses made by the tiny segments lenses around the peripheral vision fields; DISK is a soft contact lens with peripheral myopic power design to make the myopic eyes defocus at peripheral during the daytime.

It is the special lenses with peripheral lots of tiny segments of plus lenses around the center

SVS

Myopic Glasses with mono-focus in each eye