Hubungan Derajat Miopia dengan Nilai Sensitivitas Kontras Menggunakan Pelli-Robson Contrast Sensitivity Chart pada Mahasiswa Kedokteran Universitas Sumatera Utara

Abstract

Background: Global prevalence of myopia is increasing, and is predicted that half of world population with have myopia in 2050. Myopia is caused by complex interaction between genetic factor and environment factor. Contrast sensitivity is an important additional test in assessing visual quality and detecting early visual disturbance. Objective: To find the correlation between myopia degree and axial length and contrast sensitivity value in students at Faculty of Medicine University of Sumatera Utara. Methods: This was an analytic observational study with cross sectional design done in Eye Clinic at University of Sumatera Utara General Hospital. Subjects of the study is medical students in Faculty of Medicine University of Sumatera Utara that had myopia who underwent refraction examination and contrast sensitivity examination. Results: From 70 study subjects, female subjects were more than male subjects. Mean age of the subjects was 19.55 years old, with most visual acuity acquired was 6/60. Most of the subjects were mild myopia, with mean axial length of 24.90 mm in the right eye and 24.88 in the left eye. Mean contrast sensitivity value was 1.94. Conclusion: There was a significant correlation between myopia degree both in the right eye (p<0,001, r= -0,511) and the left eye (p<0,001, r= -0,588). There was a significant correlation between axial length and contrast sensitivity value both in the right eye (p<0,001, r= -0,656) and the left eye (p<0,001, r= -0,640).