D A Goss1, T W Jackson. 1. School of Optometry, Indiana University, Bloomington, USA.
Abstract
PURPOSE: A study was conducted to identify variables that were different in children who were emmetropic and became myopic and in children who remained emmetropic. METHODS: A cohort of initially emmetropic children had eye and vision examinations at 6-month intervals for a period of 3 years. Ocular optical components were measured by keratometry and ultrasonography. Crystalline lens power was calculated using Bennett's formulas. RESULTS: There was a tendency for keratometer power of both principal meridians to be greater in the became-myopic group than in the remained-emmetropic group. Axial length to corneal radius (AL/CR) ratio was significantly greater in the became-myopic group than in the remained-emmetropic group. The variable with the highest sensitivity and specificity was the AL/CR ratio using the horizontal meridian corneal radius. CONCLUSIONS: Greater corneal powers and greater AL/CR ratios are risk factors for youth onset myopia.
PURPOSE: A study was conducted to identify variables that were different in children who were emmetropic and became myopic and in children who remained emmetropic. METHODS: A cohort of initially emmetropic children had eye and vision examinations at 6-month intervals for a period of 3 years. Ocular optical components were measured by keratometry and ultrasonography. Crystalline lens power was calculated using Bennett's formulas. RESULTS: There was a tendency for keratometer power of both principal meridians to be greater in the became-myopic group than in the remained-emmetropic group. Axial length to corneal radius (AL/CR) ratio was significantly greater in the became-myopic group than in the remained-emmetropic group. The variable with the highest sensitivity and specificity was the AL/CR ratio using the horizontal meridian corneal radius. CONCLUSIONS: Greater corneal powers and greater AL/CR ratios are risk factors for youth onset myopia.
Authors: Karla Zadnik; Loraine T Sinnott; Susan A Cotter; Lisa A Jones-Jordan; Robert N Kleinstein; Ruth E Manny; J Daniel Twelker; Donald O Mutti Journal: JAMA Ophthalmol Date: 2015-06 Impact factor: 7.389
Authors: Donald O Mutti; G Lynn Mitchell; Loraine T Sinnott; Lisa A Jones-Jordan; Melvin L Moeschberger; Susan A Cotter; Robert N Kleinstein; Ruth E Manny; J Daniel Twelker; Karla Zadnik Journal: Optom Vis Sci Date: 2012-03 Impact factor: 1.973
Authors: Donald O Mutti; John R Hayes; G Lynn Mitchell; Lisa A Jones; Melvin L Moeschberger; Susan A Cotter; Robert N Kleinstein; Ruth E Manny; J Daniel Twelker; Karla Zadnik Journal: Invest Ophthalmol Vis Sci Date: 2007-06 Impact factor: 4.799
Authors: Hassan Hashemi; Mehdi Khabazkhoob; Mohammad Miraftab; Mohammad Hassan Emamian; Mohammad Shariati; Tahereh Abdolahi-Nia; Akbar Fotouhi Journal: J Ophthalmic Vis Res Date: 2013-07