The term 'Part of the Eye' refers to the various components that make up the human eye. The IRIS (4 letters) is the colored part of the eye, which helps control the amount of light entering the eye. The PUPIL (5 letters) is the dark center of the eye, which also helps control the amount of light entering the eye. The uvea (4 letters) is the middle layer of the eye, which contains the blood vessels and muscles that help the eye move. The cornea (6 letters) is the clear outer layer of the eye, which helps focus light into the eye. The LENS (4 letters) is a transparent structure behind the IRIS that helps focus light onto the RETINA. The RETINA (6 letters) is the light-sensitive tissue at the back of the eye that converts light into electrical signals. The ARTS (4 letters) are the small hairs around the eye that help keep dust and other particles out. The CONE (4 letters) is a type of light-sensitive cell in the RETINA that helps us see color and detail. The LASH (4 letters) is the long curved hairs at the edge of the eyelid that protect the eye from dust and debris. The crystalline LENS (15 letters) is a transparent structure behind the IRIS that helps focus light onto the RETINA.