The optic part of the retina is the central region of the retina. It is a yellowish spot called the macula lutea. It has a depression in its center called the fovea centralis. This depression is the region of the retina that produces the sharpest vision. This portion of the retina has differing thicknesses at different areas. It is thinner at the macula lutea and usually thickest at the lamina cribrosa, which is the location on the eyeball where the optic nerve appears. The optic part of the retina lies over the uveal tract’s pigment epithelium and the intraocular pressure pushes the optic part against it. A jagged margin, called the ora serrata, marks the end of the optic part of the retina.