Macula of retina is seen when viewed from the pupil, as in ophthalmoscopy or retinal photography. The anatomical macula is defined histologically in terms of having two or more layers of ganglion cells. The umbo is the center of the foveola which in turn is located at the center of the fovea. The fovea is located near the center of the macula. It is a small pit that contains the largest concentration of cone cells. The retina contains two types of photosensitive cells, the rod cells and the cone cells. Because the macula is yellow in colour it absorbs excess blue and ultraviolet
Retinal precursor cells Wnt11 is localized in the center of the developing retina and is suggested to play a role in precursor cell differentiation. This expression coincides with the fact that committed cells are located in the center of the developing retina while undifferentiated cells are concentrated in the periphery Fz5 expression is implicated in differentiation of retinal precursor cells to a neural fate. Retinal precursor cells Retinal precursor cells are biological cells that differentiate into the various cell types of the retina during development. In the vertebrate, these retinal cells differentiate into seven cell types, including retinal ganglion cells, amacrine cells, bipolar