It bends the rays light which pass through it.
It is lens. The lens consists of the lens capsule, the lens epithelium, and the lens fibres.
)( is a concave lens() is a convex lens
The ocular is the upper lens and objective is the lower lens
The objective lens
A crystalline lens is the lens in the human eye.
The pole of a lens is the midpoint of the lens' geometric axis. It is where the principal axis intersects the lens.
Double-convex lens
The best lens hood for a Canon 55-250 lens is the Canon ET-63 lens hood. It helps reduce lens flare and protects the lens from unwanted light.
The Shutter.
= A lens cap is a cover to a lens on a camera or camcorder.=
The upper lens is called the ocular lens or the eyepiece.
It depends on the lens. Assuming parallel rays entering the lens: Convex lens - they converge, Concave lens - they dinverge.