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 Retina structure: The retina is a light sensitive layer at the back of the eye and covers roughly 65 percent of the interior surface of the eye. The retina contains two types of light sensitive cells called Rods & Cones. The rods respond to dim light and the cones detect color.