Paragon CRT® Corneal Reshaping Symmetry is a new concept Corneal Reshaping Symmetry developed, designed and produced by Paragon Vision Sciences in the United States. It is a leader in the field of Corneal Reshaping Symmetry. It obtained the FDA certification in the United States in 2002 and the CFDA certification in 2016. It currently accounts for about 70% of the market share in the United States.

The CRT®100 corneal resizing mirror uses the new high oxygen conductivity material HDS100 jointly developed by NASA as the raw material, and the integrated molding products from materials to finished products are safe and reliable.

The CRT®100 corneal resizing lens adopts a unique three-zone design, and the three-zone design adjustments of the lens are not related to each other. Adjusting the lens in units of microns of the arrow height makes the fitting more accurate and intuitive. The inner and outer surfaces of CRT lenses are harmoniously designed, with uniform lens thickness, which increases the oxygen conductivity by about 30% compared to ordinary shaping lenses. The connections of each area of ​​the CRT lens are smoothly transitioned, and the tangent design of the landing area allows the lens to come into contact with the cornea, reducing lens inlay and improving wear safety.