A lens is considered a <u>convex </u>lens when its diameter is much greater than its thickness.
Convex lenses are used in eyeglasses for correcting farsightedness, wherein the gap among the attention's lens and retina is too short, because of which the point of interest lies at the back of the retina. Eyeglasses with convex lenses increase refraction, and as a consequence reduce the focal length.
A concave lens is thinner in the middle and thicker at the edges. A convex lens is thicker within the middle and thinner at the rims. additionally known as. it's also referred to as Diverging Lens. it's also referred to as Converging Lens.
An optical lens is normally made from two round surfaces. If those surfaces are bent outwards, the lens is called a biconvex lens or actually a convex lens. these kinds of lenses can converge a beam of light coming from out of doors and attention it to a point on the other side.
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