WASHER ONLY. View All. Spiders are similar to top rings or shade risers in that they are used to reinforce and spread the parts of a lamp or fixture that provide shading. Spiders, however, are generally used to fortify either plastic or glass cylinder-style shades. Though somewhat rare on older lamps, these lamp parts are often found on modern, minimalist-styled light fixtures. We currently offer a brass plated steel spider that is designed for 4â diameter shades or cylinders.
A scleral lens is a specialized contact lens used to manage a variety of eye conditions. It is made of plastic that is clear and rigid, yet allows the eye to breathe, keeping it healthy. A scleral lens is slightly larger than most soft contact lenses and is designed to rest on the white (less sensitive) part of the eye called the sclera. That is why itâs called a scleral lens! This unique design makes the lens very comfortable to wear, all day long.
Rigid gas permeable contact lenses, also known as RGP contacts, have a lot of advantageous features. Even though some people refer to RGP contact lenses as hard contacts, they have little in common with the hard contacts of the past. Gas permeable lenses are made from 100 percent polymer, while soft contact lenses are made from a combination of polymer and water. The composition of RGP lenses makes them harder than soft lenses, but still flexible. Oxygen is essential to eye health.