The retina is composed of the inner neural or sensory layers and the outer pigment epithelium. The neural retina has nine layers; from inner to outer they are the internal limiting membrane, nerve fiber layer, ganglion cell layer, inner plexiform layer, inner nuclear layer, outer plexiform layer, outer nu-clear layer, external limiting membrane, and photoreceptors. The normal retina is essential transparent (except for the pigment in the blood), although it does absorb a quantity of light passing through it. The sensory retina in the periphery is thin and relatively weak and thus is susceptible to full thickness breaks.
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