The Difference of Intraocular Pressure (IOP) between Myopic Eyes and Emmetropic Eyes in Medical Students of Sebelas Maret University

Abstract

Introduction: Intraocular pressure (IOP) is a major risk factor of glaucoma. Prevalence of glaucoma increases in myopic eyes than in emmetropic eyes. There was a hypothesis that the relationship between glaucoma and myopia might be mediated by intraocular pressure. This study aims to investigate the difference of intraocular pressure (IOP) between myopic eyes and emmetropic eyes in medical students of Sebelas Maret University.

Methods: This study applied analytical observational method with cross sectional approach. Subject of the research was medical students of Sebelas Maret University batch of 2012. Samples were selected by a screening with inclusion and exclusion criterias and then randomized by simple random sampling technique. The total samples were 76 students. Afterwards, samples were interviewed about last refraction examination history and examined for refraction status through visus examination using snellen optotype so that samples were divided to myopic eyes group and emmetropic eyes group. Then, IOP was evaluated using Non Contact Tonometer (NCT). The data was analyzed with independent t-test which was processed by Statistical Product and Service Solutions (SPSS) 20.0 programme for Windows.

Results: The mean of IOP in myopic eyes was 17.02 2.69 mmHg in right eyes (OD) and 16.80 2.84 mmHg in left eyes (OS). The mean of IOP in emmetropic eyes was 15.88 2.44 mmHg (OD) and 15,32 2,34 mmHg (OS). The comparative analysis of IOP between myopia and emmetropia showed the value of p = 0.065 (OD) and p = 0.076 (OS).

Conclusions: There is no significant difference of IOP between myopic eyes and emmetropic eyes in medical students of Sebelas Maret University.

Keywords: Emmetropia, Intraocular Pressure, Medical Student, Myopia.