The smallest biological unit of specialized function capable of self-replication. The choroid is rich in blood vessels and connective tissue, and is a major supplier of oxygen and nutrients to the RPE and photoreceptor cells. Each parent contributes one chromosome to each child, so children get half of their chromosomes from their mothers and half from their fathers. A type of photoreceptor cell. Although cones are present throughout the retina, they densely populate the macula, the central portion of the retina.
Cone cells are particularly important for color vision and discriminating fine visual detail.
A microelectrode chip implanted in the visual cortex, the portion of the brain that interprets visual information. This device would theoretically transmit visual images from a camera-like device to the brain. The goal of this device is similar to the retinal chip and could possibly restore ambulatory vision to patients with end-stage retinal degeneration. DNA is found in the nucleus where it is organized into highly specific sequences that define each gene on the 23 chromosomes. Yellow-white deposits found under the macula.