Meaning of Dunham. Celtic name. In Celtic, the name Dunham means - Dark skinned fighter.. Other origins for the name Dunham include - Celtic, Irish.The name Dunham is most often used as a boy name or male name. Celtic Name Meaning - Dark skinned fighter. Origin - Celtic.
eyeball. 1  Photoreceptors are the cells in the retina that respond to light. Their distinguishing feature is the presence of large amounts of tightly packed membrane that contains the photopigment rhodopsin or a related molecule.
The process of phototransduction occurs in the retina. The retina has many layers of various cell types. The best-known photoreceptor cells (rods and cones) form the outermost layer, closest to the sclera, and furthest from the pupil. They are the photoreceptors responsible for sight.