central retina
http://purl.obolibrary.org/obo/UBERON_8000004
Region of retina around the fovea that extends approximately for 6 mm. Central retina is considerably thick due to increased density of photoreceptors, particularly cones and their associated bipolar and ganglion cells. [ https://webvision.med.utah.edu/book/part-i-foundations/simple-anatomy-of-the-retina/ ]