EVALUATION OF MULTIFOCAL ERG AND A-SCAN BIOMETRY IN MYOPIC EYES.
Journal Title: International Journal of Basic and Applied Physiology - Year 2015, Vol 4, Issue 1
Abstract
Background: Myopia is a common type of refractive error. It is a non-life-threatening disorder with huge social and economic consequences due to its increasing prevalence. Axial length (AL) is the primary determinant of non-syndromic myopia. It is a parameter representing the combination of anterior chamber depth, lens thickness and vitreous chamber depth of the eye. Multifocal Electroretinography( mfERG) provide objective assesment of the central retinal function at different retinal areas within a short duration of time. Objectives: 1. to investigate early morphological changes of retinal function in myopic eye.2. Role of axial length in determining the refractive state of the eye. Materials and Method: A cross sectional study was done from 28-11-14 to 15-05-15 after taking ethical clearance from Institutional Ethics Committee in Electro physiology Department of Regional Institute of Ophthalmology ,Gauhati Medical College and Hospital,Guwahati,Assam.India. 28 patients were selected meticulously .The axial lengths of the myopic eyes were measured by A-scan biometry. The multifocal Electroretinography mfERG technique was done for recording local electrophysiological responses from different regions of the retina which has got high sensitivity & specificity in diagnosing early retinal defect.Results: There was a significant correlation between refractive error and axial length ,with longer eyes being more myopic (p<0.05). The hypothesis of correlation between Axial Length and Myopia was proved. MultifocalERG of 28 myopics (56 eyes) showed normal central macular cone function means no chang in amplitude and implicit time. Interpretation and Conclusion: The study shows that myopic eyes has a statistically significant correlation with Axial Length .Means Diopteric power of the eye increase along with the increase of axial length .
Authors and Affiliations
DR (MRS) BONTI BORA
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