abnormal retina outer plexiform layer morphology thick retina outer plexiform layer 2023-06-20T20:05:12Z increased thickness of the retinal layer that is the site of synapses between the rods and cones (axons) and the horizontal and bipolar cells (dendrites) increased retina OPL thickness MP:0014266 thick retinal OPL increased thickness of the outer plexiform layer of retina