Long Term Effects of Multifocal Orthokeratology on Corneal and Choroidal Structures in Healthy Subjects With Myopia- A Pilot Study

Inclusion Criteria: * Men and women aged over 18 years * Myopia defined as between -1D and -6 D with an increase of 0.5D within the last 18months prior to inclusion * Prospect orthokeratology contact lens wearers * Normal findings in the slit lamp examination, no corneal pathologies Exclusion Criteria: * Participation in a clinical trial in the previous 3 weeks * Presence of any abnormalities (such as refractive surgery) preventing reliable measurements as judged by the investigator * Current contact lens wearers * Pregnancy, planned pregnancy or lactating