A plano concave lens is an optical lens with one concave surface and one flat surface. It has a negative focal length, and can be used for light projection, beam expansion, or to increase focal length ...

We were unable to process your request. Please try again later. If you continue to have this issue please contact [email protected]. Back to Healio Legislation regulating cosmetic plano ...

A federal warning regarding the dangers of noncorrective, decorative contact lenses without a prescription and without proper fitting by an eye care professional has won praise from the ophthalmic ...

Shanghai Optics manufactures high quality plano-convex lens; optical lenses with a positive focal length. These all-purpose lenses are available in a wide variety of sizes, substrates, and coatings, ...

Just before summer Ray-Ban, arguably the most recognizable brand in eyewear, unveiled its latest technological advancement, a first-of-its-kind a range of eyewear called Ray-Ban Reverse, which shifts ...

The Food and Drug Administration has issued a new draft guidance document titled "Impact-Resistant Lenses: Questions and Answers" to explain test procedures, impact-resistant lens testing equipment, ...

While there were relatively few changes to eyewear used to protect from optical radiation, chemical splash, dust or heat, there are some changes to the impact resistance requirements for non-plano ...