A STUDY OF ASSOCIATION BETWEEN INTRAOCULAR PRESSURE AND REFRACTIVE ERRORS – A COMPARATIVE CROSS SECTIONAL STUDY
Dr. Sathya Palaniswamy, D.G.O., M.D. and Dr. Sukumar Rajendran*
ABSTRACT
Introduction: Glaucoma is the leading cause of irreversible complete blindness in the world. It comprises of a group of ocular diseases with progressive damage to the optic nerve. It is one of the ophthalmic emergencies which causes sudden loss of vision. In India, prevalence of glaucoma is estimated to be about 2.65%. The prevalence of primary open angle glaucoma (POAG) in south India above 40 years of age is estimated to be 1.7% in the Aravind Comprehensive Eye survey (ACES). Raised intraocular pressure is one of the modifiable risk factors for primary open angle glaucoma. An association between intraocular pressure (IOP) and high degree of myopia has been reported in some studies. Here it is proposed to find out intra ocular pressure in patients with myopia and hypermetropia and compare it with emmetropic subjects. Materials & Methods: 60 cases (30 myopic and 30 hypermetropic) and 30 emmetropic subjects were selected by automatic refraction and subjective refraction. Later they were subjected to Goldmann applanation tonometry with slit lamp mounted examination for measuring intra ocular pressure. Results: IOP is significantly higher in myopes (P < 0.05), when compared to hypermetropes and emmetropes. Conclusion: The myopics are more prone to develop increased intraocular pressure than hypermetropics and emmetropics.
Keywords: Intraocular Pressure, Myopia, Hypermetropia, Emmetropia, Glaucoma.
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