Axial length of the eyeball in ametropia in comparison to emmetropia by A-Scan: A cross sectional study
Journal Title: Medpulse International Journal of Physiology - Year 2017, Vol 4, Issue 3
Abstract
Background: Axial length is regarded as one of the primary determinants of refractive error. The correlation with refractive error is larger for axial length than for any other component. Objective: To study the axial length of the eyeball in ametropia in comparison to emmetropia. Material and Methodology: The present cross sectional study was carried out from October 2012 to September 2013 at Ophthalmology outpatient department, Regional eye hospital, Vishakapatnam. A study group of 150 cases divided into three groups by simple random sampling as emmetropes, myopes and hypermetropes in the age group of 10-30 years were included in the study. After taking informed consent the patient was enrolled into the study. A scan biometry using Appascan 2000 was done in all cases to know axial length. Results: The majority of patients in all groups were from age group 16-20 years with no gender difference. The axial length in emmetropes, myopes and hypermetropes was 23.60 ± 0.70 mm, 25.98 ± 1.00 mm and 21.58 ± 0.76 mm respectively. The mean axial length in the three groups was analyzed using ANOVA test and was found to be statistically significant (p< 0.05). Conclusion: Axial length is greater in myopic eyes as compared to that of hypermetropic eyes. The axial length is directly proportional to the degree of refractive error in myopic eyes and inversely proportional in hypermetropic eyes.
Authors and Affiliations
R Havilah Twinkle, Parvathi G
Keywords
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Axial length of the eyeball in ametropia in comparison to emmetropia by A-Scan: A cross sectional study
Background: Axial length is regarded as one of the primary determinants of refractive error. The correlation with refractive error is larger for axial length than for any other component. Objective: To study the axial le...