Category: Jewelry Watches glasses

Question:
to buy contact lenses should pay attention to what? What is Base Curve?

Answer:
Base Curve is the corresponding radius of curvature of the cornea of human eye is an important basic parameters. Only after an accurate measurement, according to corneal curvature radius of the base conversion to arc (BC), in order to allow customers more comfortable lens wear. . Generally such a situation, BC greater the appearance of the inside surface of the lens the more flat, if the lens BC larger than the cornea, lens wear will have to move through the process, leading to free sliding lens, there will be Volatility is a visual generation (well before the blink of an eye blink of an eye after the unknown, followed by a clear, circular alternating vision changes) of the BC if the lens is relatively small, then the lens in the process of moving through the wearing small, tight tracks will lead to syndrome CL and a series of complications, but also accompanied by volatility vision generation (before the blink of an eye blurred after the blink of an eye clear, followed by blurred vision alternating cycle changes). I h…