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lens
The biconvex transparent structure that focuses light on the retina is called the lens.
The biconcave structure is the "lens, but his focuses the light, it does not adjust for the amount of light. The structure that adjusts for the amount of light entering the eye is the "iris"
The pupil goes larger in the dark, and smaller in the light.
The lens bends light that has entered the eye through the cornea and focuses it onto the retina at the back of the eye.
The biconcave structure is the "lens, but his focuses the light, it does not adjust for the amount of light. The structure that adjusts for the amount of light entering the eye is the "iris"
A parabolic mirror best focuses light onto a spot. Or a convex lens will do similar. In the eye, the lens towards the front of the eye focuses light onto the retina, where the light sensitive cells lie.
lens.
Lens
Light entered Egyptian temples through a CLERESTORYwindow.
The lens focuses light on the retina.
It focuses visible light.