These lenses reduce glare from a surface like water, so theyâre great for sports and driving. But they can make it hard to see the liquid crystal display on your carâs dashboard. Your unique vision problem will determine the shape of your lens. Youâll need a concave lens (curves inward) if youâre nearsighted. A convex lens (curves outward) will help if youâre farsighted. If you have astigmatism, your cornea is shaped wrong, so your lenses may be more like a cylinder. Simply put, the lens is a tool you use to focus light onto your retina in the correct way.
Define allay: to subdue or reduce in intensity or severity : alleviate; to make quiet : calm; to diminish in strength : subside â allay in a sentence to subdue or reduce in intensity or severity : alleviate; to make quiet : calm; to diminish in strength : subsideâ¦
Hordeolum and Stye Â». A hordeolum (ie, stye) is a localized infection or inflammation of the eyelid margin involving hair follicles of the eyelashes (ie, external hordeolum) or meibomian glands (ie, internal hordeolum). stye (or sty) is an acute infection of the secretory glands of the eyelids. Frequently, bacteria can enter and infect an eyelid oil gland, which are present in both the upper and lower eyelids, causing increased inflammation, pain, and redness of the eye, and even redness of the surrounding eyelid and cheek tissue.