A circle contact lens, also known as a big eye contact lens and circle lens, is a cosmetic contact lens that makes the eye's iris appear larger. It has become a trend throughout East, South and Southe
Comparison between a natural dark brown eye and hazel circle contact lens (notice the size difference)
Circle contact lenses aim to create the illusion of stronger limbal rings (shown here are naturally prominent limbal rings without circle contact lenses).
The iris is a thin, ring-shaped structure in the eye in most mammals and birds that is responsible for controlling the diameter and size of the pupil, and thus the amount of light reaching the retina.
The iris in humans is the colored (typically brown, blue, or green) area, with the pupil (the circular black spot) in its center, and surrounded by the white sclera.
The iris (brown coloured portion of the eye) controls the size of the pupil by contracting the sphincter pupillae and dilator pupillae muscles.
Light micrograph of the iris near to the pupil. M. sph. sphincter muscle, L lens
Among human phenotypes, blue-green-gray eyes are a relatively rare[citation needed] eye color and the exact color is often perceived to vary according to its surroundings.