6ft Rectangular Table | 8ft Rectangular Table. Our most popular standard SQUARE tablecloth size is 70x70 inches, this means the entire tablecloth is 70 inch long and 70 inch wide, this size is most commonly used on a 48 inch square table (4ft x 4ft) which allows for a drop on all 4 sides of 11 inches.
Cornea, Lens, and Iris. The iris is the colored part of the eye. A circular muscle in the iris controls the amount of light entering the eye through the pupil, the black area in the center of the iris. The cornea is the outer clear, round structure that covers the iris and the pupil. The cornea directs light rays into the eye and helps focus them on the light-sensitive retina at the back of the eye, providing sharp, clear vision. The lens is located behind the iris and is normally clear. Light passes through the pupil to the lens.
The cornea is the transparent, dome-like structure on the front part of the eye. The cornea gives the eye two-thirds of its focusing or refracting power. One-third is produced by the internal crystalline lens. The cornea functions like a camera lens, helping to focus light coming into the eye onto the retina. The cornea is also filled with nerves that alert us to irritations that could potentially harm our vision and eye health. The cornea is a remarkable piece of tissue made up of specialized cells.