The center of the retina is a pit called the ____________ . The cells that are photoreceptors (detect color) are ____________ . In low light conditions, only rods are activated, and visual acuity is best in the ____________ of the eye. In bright light conditions, visual acuity is best when light is focused on the ____________ of the eye. A single ganglion cell outside of the fovea receives input from ____________ rod(s). Each cone synapses with ____________ ganglion cell(s).