PTERYGION
\tˈɜːɹɪd͡ʒən], \tˈɜːɹɪdʒən], \t_ˈɜː_ɹ_ɪ_dʒ_ə_n]\
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A varicose excrescence of the conjunctiva, of a triangular shape, and commonly occurring at the inner angle of the eye: whence it extends over the cornea. Sometimes two or three pterygia occur on the same eye, and cover the whole cornea with a thick veil, which totally prevents vision. According to Scarpa, the ancients gave the name Pannic'ulus to this last complication. If the pterygion cannot be dispelled by means of discutient collyria, it must be removed by the scissors.
By Robley Dunglison
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