Abstract The symptoms associated with pterygium formation are multiple. These complaints may range from burning of the eyes to decreased vision and eye strain. Yet many individuals have no complaint at all except for the fear of "a cataract growing over their eye" and the cosmetic disfigurement of a pterygium. Textbooks on refraction1,2 state that diseases of the cornea and tumors of the lids may change the corneal curvature and astigmatism. Pterygium is not specifically mentioned in these books. Few studies have been carried out to determine what changes in the corneal curvature and refraction are produced from pterygium.3-6,8 Amsler7 has demonstrated by using the Placido disc that the curvature of the cornea is altered before the pterygium actually invades the optical zone of the cornea. Pavisic8 measured the corneal curvatures in 64 cases of pterygium before and after surgery. In 70% of these cases, the removal References 1. Duke-Elder, S.: The Practice of Refraction , Ed. 4, New York, Blakiston Company (division of McGraw-Hill Book Company, Inc.) 1943, pp. 93-98, 114-115. 2. Cowan, A.: Refraction of the Eye , Ed. 3, Philadelphia, Lea & Febiger, 1948. 3. Mussabieli, V. C.: Refraction in Pterygium , Ztschr. f. Augenh. 71:237-246 ( (June) ) 1930. 4. Ponico, E.: Pterygium: Effects on Corneal Refraction: Astigmatism in Relation to Size of Pterygium , Boll ocul. 12:15-21 ( (Jan.) ) 1933. 5. Carreras: Pterygium Influence on Ocular Refraction (Production of Astigmatism) , Med. ibera 1:276-277, ( (Feb. 25) ) 1933. 6. Dubinov, S. A., and Tsipenyuk, L. S.: Improvement of Corneal Astigmatism Following Surgical Removal of Pterygium , Vestnik oftal. 13:100-104, 1938. 7. Amsler, M.: Pterygium Causing Corneal Astigmatism , Ophthalmologica 126:52-54 ( (July) ) 1953.Crossref 8. Pavisic, Z.: The Corneal Astigmatism in Cases of Pterygium , Ophthalmologica 124:157-165 ( (Sept.) ) 1952.Crossref 9. Friedlander, E., and Hurwitz, P.: The Effect of a Pterygium on the Refractive Error , Optom. Week. 46:439 ( (March) ) 1955. 10. Chilaris, G. A.: The Direction of the Corneal Meridian of the Greatest Refraction , Arch. opht. 13:29-39, 1953. 11. Lopez, Lacarrere, J.: Instability of the Cornea , Arch. Soc. oftal. hispano-am. 15:552-556, 1955.
Archives of Ophthalmology – American Medical Association
Published: Oct 1, 1960
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