Fresh style color lenses make eyes invisible

Selling Units:	Pair
Package Type:	1, dry sheet large package: vacuum large package (200pcs /1 version) 2. Large package of wet tablets: large package after hydration (multiple pieces/bag) 3, wet tablet single (sterile) : Cillin bottle packaging (5ml); PP cup 5 cups package (cup size 67*38

Hydrogel, refractive index 1.433-1.440, oxygen permeability coefficient (DK value) 10 0 Degree Contact Lenses, Contact Lenses For Myopia, Custom Eyeglass Lenses Oxygen metabolism 1. Cornea and oxygen 80% of the oxygen required by the cornea comes from air, 15% from the corneal limbal vascular network and 5% from aqueous humor. Corneal hypoxia can cause different manifestations, such as corneal edema, decreased vision, decreased nerve end sensation, limbal vascular hyperplasia, and decreased corneal epithelial and endothelial function, etc. Wearing soft contact lenses while open eyes, the oxygen supply of the cornea mainly comes from air, while wearing soft contact lenses made of hydrogel material during sleep, the cornea cannot obtain sufficient oxygen supply, resulting in corneal hypoxia. 2. Factors that determine oxygen permeability of contact lenses Water content/thickness/material/old and new lenses/tightness, etc 3. Several terms about the oxygen permeability of contact lenses Oxygen permeability coefficient DK value D - diffusion coefficient K - dissolution coefficient The higher the water content, the higher the DK value Oxygen conductivity DK /T- the ability of oxygen to pass through a specific lens of a certain thickness Isooxy EOP - the percentage of oxygen between the lens and the cornea Without glasses, the oxygen available to the human cornea is 21%, that is, EOPMAX=21% International Association of Contact Lens Educators - Daily Lens DK /T greater than 24, EOP greater than 12% Long lens DK /T is greater than 87, EOP is greater than 18%