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¦
decoy. 1  a place into which wild ducks, etc. are lured for capture. 2  an artificial bird or animal, or sometimes a trained live one, used to lure game to a place where it can be shot. 3  a thing or person used to lure or tempt into danger or a trap: a police decoy.