Sclera pass. The thickness of the sclera varies from 1mm at the posterior pole to 0.3 mm just behind the rectus muscle insertions. The sclera's blood vessels are mainly on the surface. Along with the vessels of the conjunctiva (which is a thin layer covering the sclera), those in the episclera render the inflamed eye bright red. In many vertebrates, the sclera is reinforced with plates of cartilage or bone, together forming a circular structure called the sclerotic ring. In primitive fish, this ring consists of four plates, but the number is lower in many living ray-finned fishes, and much higher
The Human Factor (1963 The Outer Limits) The Human Factor (1963 The Outer Limits) "The Human Factor" is an episode of the original "The Outer Limits" television show. It first aired on 11 November 1963, during the first season. The title was re-used in 2002 for an episode with an unrelated plot. Doctor James Hamilton develops a device that allows him to experience the thoughts and feelings of another person. At a military outpost in Greenland, Project Engineer Maj. Brothers (Guardino) begins losing his grip on reality - while wrestling with guilt and remorse - after losing one of his soldiers in an icy crevasse. Mentally haunted