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.
Helpful Hints for Transit Levels. 1  When the objective lens is not in use, it should be covered with a lens cap to prevent damage to the equipment. 2  Detachable sunshades are useful in preventing glare and protecting the objective lens.  DO NOT lift your level by the telescope; always be sure to lift it by the base.