Pemphigus vulgaris. Pemphigus vulgaris Pemphigus is a rare skin disorder characterized by blistering of your skin and mucous membranes. The most common type is pemphigus vulgaris, which involves painful sores and blisters on your skin and in your mouth.
service and quality very seriously. answer for everything eyewear! Gradient Tint. Gradient tint is the term used to describe a lens with a fully tinted upper portion that gradually diminishes towards the bottom. Ultimately, the bottom section of a gradient lens will be completely clear.
crown lens - a lens made of optical crown glass. concave lens, diverging lens - a lens such that a parallel beam of light passing through it is caused to diverge or spread out. eyepiece, ocular - combination of lenses at the viewing end of optical instruments.