Who found eye structure
Actually it was not a single person The eye has been the subject of conflicting interpretations since antiquity. Many ancient physicians and philosophers believed in the idea of the active eye. Plato, for instance, wrote in the fourth century B. C. that light emanated from the eye, seizing objects with its rays. More metaphorically, Aristotle's disciple, Theophrastus, wrote that the eye had "the fire within." In saying this, he departed from the ideas of his teacher, since Aristotle was among the first to reject the extramission theory of vision. "In general, it is unreasonable to suppose that seeing occurs by something issuing from the eye," he declared. Aristotle advocated for a theory of intromission by which the eye received rays rather than directed them outward.
In the second century A. D., Galen had at least two different theories of the eye to choose from. He chose the extramission theory because it corresponded well with his image of sight as a function of an optical pneuma, flowing forth from the brain to the eyes through hollow optic nerves. Galen defined many of the fundamental features of the anatomy and physiology of the eye until the seventeenth century. Benefiting from the work of the anatomists who dissected in Alexandria, such as Rufus of Ephesus, he described the retina, cornea, iris, uvea, tear ducts, and eyelids, as well as two fluids he called the vitreous and aqueous humors. He noted some of the peculiar features of sight such as binocular vision. Galen paid particular attention to the crystalline lens, which he described as a round lens in the middle of the eye. He concluded: "the crystalline lens is the principal instrument of vision, a fact clearly proved by what physicians call cataracts, which lie between the crystalline humor and the cornea and interfere with vision until they are couched.
The eye has been the subject of conflicting interpretations since antiquity. Many ancient physicians and philosophers believed in the idea of the active eye. Plato, for instance, wrote in the fourth century B. C. that light emanated from the eye, seizing objects with its rays. More metaphorically, Aristotle's disciple, Theophrastus, wrote that the eye had "the fire within." In saying this, he departed from the ideas of his teacher, since Aristotle was among the first to reject the extramission theory of vision. "In general, it is unreasonable to suppose that seeing occurs by something issuing from the eye," he declared. Aristotle advocated for a theory of intromission by which the eye received rays rather than directed them outward.
In the second century A. D., Galen had at least two different theories of the eye to choose from. He chose the extramission theory because it corresponded well with his image of sight as a function of an optical pneuma, flowing forth from the brain to the eyes through hollow optic nerves. Galen defined many of the fundamental features of the anatomy and physiology of the eye until the seventeenth century. Benefiting from the work of the anatomists who dissected in Alexandria, such as Rufus of Ephesus, he described the retina, cornea, iris, uvea, tear ducts, and eyelids, as well as two fluids he called the vitreous and aqueous humors. He noted some of the peculiar features of sight such as binocular vision. Galen paid particular attention to the crystalline lens, which he described as a round lens in the middle of the eye. He concluded: "the crystalline lens is the principal instrument of vision, a fact clearly proved by what physicians call cataracts, which lie between the crystalline humor and the cornea and interfere with vision until they are couched.
