Paragon Vision Sciences is a world leader in orthokeratology (ortho-k), specialty contact lenses and oxygen permeable contact lens materials. As a progressive manufacturer of a full range of oxygen permeable (GP) materials used in the manufacturing of contact lenses, Paragon Vision Sciences developed Paragon CRT¬ Contact Lenses for use in orthokeratology. Approved by the FDA in June of 2002 for overnight wear, Paragon CRT¬ Contact Lenses are the preferred choice by an elite, global group of eye care practitioners to manage myopia (nearsightedness).