Goss D A, Jackson T W
School of Optometry, Indiana University, Bloomington, USA.
Optom Vis Sci. 1995 Dec;72(12):870-8. doi: 10.1097/00006324-199512000-00005.
A study was conducted to identify variables that were different in children who were emmetropic and became myopic and in children who remained emmetropic.
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.
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.
Greater corneal powers and greater AL/CR ratios are risk factors for youth onset myopia.
开展一项研究以确定在正视儿童发展为近视和仍保持正视的儿童中存在差异的变量。
一组初始正视儿童每隔6个月进行一次眼部和视力检查，为期3年。通过角膜曲率测量法和超声检查法测量眼的光学部件。使用贝内特公式计算晶状体屈光力。
发展为近视组的两个主子午线的角膜曲率计屈光力均有高于仍保持正视组的趋势。发展为近视组的眼轴长度与角膜半径（AL/CR）之比显著高于仍保持正视组。敏感度和特异度最高的变量是使用水平子午线角膜半径的AL/CR比。
较高的角膜屈光力和较高的AL/CR比是青少年近视发病的危险因素。
