Journal Paper

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Journal: بینا
Year:1392 | Volume:18 | Issue:3 (پی در پی 72)
Start Page:270 | End Page:279

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Title

THE EFFECT OF CONTACT LENS INDUCED MYOPIA AND HYPEROPIA ON OPTIC DISC PARAMETERS MEASURED BY OPTICAL COHERENCE TOMOGRAPHY

Pages

 Start Page 270 | End Page 279

Abstract

 Purpose: To determine the effect of induced MYOPIA and HYPEROPIA using soft contact lenses on OPTIC DISC PARAMETERS measured by Fourier domain OPTICAL COHERENCE TOMOGRAPHY (FD-OCT) in emmetropic persons.Methods: In a quasi-experimental self controlled study, 57 normal emmetropic participants 18-42 years of age were studied. Each subject underwent a complete ophthalmic examinations including measurement of best corrected visual acuity, intraocular pressure, dry and cycloplegic refractions and axial length. OCT scans to measure OPTIC DISC PARAMETERS were repeated in 114 cycloplegic eyes of 57 participants, while different refraction powers were induced in each eye by wearing soft contact lenses of five different powers (-10.00, - 5.00, plano, +5.00, +10.00).Results: Mean age of participants was 25.8±6.5 years. Average RNFL thickness was 123.29±10.56 m 123.17±11.61 m, 122.77±11.61 m, 123.37±11.15 m, 123.42±11.45 m in high-induced-myopia, mild-induced-myopia, emmetropia (Contact Lens:plano), mild-induced-hyperopia, and high-induced-hyperopia groups, respectively. Corresponding values for average cup area were0.65±0.53 mm2, 0.63±0.53 mm2, 0.63±0.52 mm2, 0.64±0.56 mm2, and0.64±0.54 mm2 respectively Also in these groups neither disc area nor rim area measurements were statistically different.Conclusion: Using Fourier domain OCT, inducing MYOPIA and HYPEROPIA by soft contact lens has no significant effect on RNFL thickness, disc area, cup area and rim area.

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