Arcus senilis is white, blue, or grey rings around the cornea, the clear, dome-like part of the eye. They form in front of the iris, the colored part of the eye. The rings consist of fatty ...

In most cases, the white part of your eye shouldn’t be visible above your iris (colored part of the eye) without lifting your eyelid. If the white of your eye shows between your iris and your ...

By keeping the bulb in the center and orbiting the blue gel (for the iris) and the opaque disk (for the pupil) around the bulb, the eye can appear to gaze in different directions. By adjusting the ...