CAJ | 학술논문

目的观察高度近视眼配戴角膜塑形镜后屈光度和角膜曲率的变化.方法临床病例自身对照研究.对2008年2月至2010年12月在南京大学附属南京儿童医院34例高度近视的青少年共63只眼连续戴镜2年以上复查屈光度和角膜曲率.结果 (1)屈光度的变化:戴镜前的屈光度为(-6.83±0.70)D,戴镜一年后的屈光度为(-6.86±0.73)D,差异无统计学意义(P＞0.05);戴镜两年后的屈光度为(-7.01±0.70)D,差异有统计学意义(P＜0.05).(2)角膜曲率的变化:戴镜前的水平角膜曲率为(43.34±1.15)D和垂直角膜曲率为(44.35±1.48)D;戴镜一年后,水平角膜曲率为(43.11±1.20)D和垂直角膜曲率为(43.82±1.80)D,两者差异均有统计学意义(P＜0.05);戴镜两年后,水平角膜曲率为(43.11±1.52)D和垂直角膜曲率为(43.73±1.77)D,与戴镜前相比,两者差异有统计学意义(P＜0.05).戴镜一年后水平角膜曲率变平坦(0.24±0.42)D,两年后(0.27±0.46)D,差异无统计学意义(P＞0.05);戴镜一年后垂直角膜曲率变平坦(0.32±0.44)D,两年后(0.34±0.69)D,差异无统计学意义(P＞0.05).结论 (1)高度近视眼行角膜塑形术后一年,控制近视未进展;行角膜塑形术后两年,近视仅有轻度进展.(2)高度近视眼的角膜曲率在戴镜一年和戴镜两年发生轻微的平坦化,且在持续戴镜的两年内,这种轻微的平坦化改变保持稳定.
목적 관찰고도근시안배대각막소형경후굴광도화각막곡솔적변화.방법 림상병례자신대조연구.대2008년2월지2010년12월재남경대학부속남경인동의원34례고도근시적청소년공63지안련속대경2년이상복사굴광도화각막곡솔.결과 (1)굴광도적변화:대경전적굴광도위(-6.83±0.70)D,대경일년후적굴광도위(-6.86±0.73)D,차이무통계학의의(P＞0.05);대경량년후적굴광도위(-7.01±0.70)D,차이유통계학의의(P＜0.05).(2)각막곡솔적변화:대경전적수평각막곡솔위(43.34±1.15)D화수직각막곡솔위(44.35±1.48)D;대경일년후,수평각막곡솔위(43.11±1.20)D화수직각막곡솔위(43.82±1.80)D,량자차이균유통계학의의(P＜0.05);대경량년후,수평각막곡솔위(43.11±1.52)D화수직각막곡솔위(43.73±1.77)D,여대경전상비,량자차이유통계학의의(P＜0.05).대경일년후수평각막곡솔변평탄(0.24±0.42)D,량년후(0.27±0.46)D,차이무통계학의의(P＞0.05);대경일년후수직각막곡솔변평탄(0.32±0.44)D,량년후(0.34±0.69)D,차이무통계학의의(P＞0.05).결론 (1)고도근시안행각막소형술후일년,공제근시미진전;행각막소형술후량년,근시부유경도진전.(2)고도근시안적각막곡솔재대경일년화대경량년발생경미적평탄화,차재지속대경적량년내,저충경미적평탄화개변보지은정.
Objective To observe the variation of refraction and corneal curvature of high myopia eyes after over night orthokeratology.Methods Sixty-three eyes of 34 adolescent high myopia patients who had worn Ortho-k lenses for over 2 years were studied.Refraction and corneal curvature was measured before and after Ortho-K lenses wearing,which was lasting above 2 years.Results Variation of refraction∶ Before OK,mean refraction was (-6.83±0.70)D,after OK wearing for 1 year,it was (-6.86±0.73)D,and the difference had no significance (P ＞0.05); after OK wearing for 2 years,it was (-7.01±0.70)D,and the difference was significance (P ＜0.05).Variation of corneal curvature∶ Before OK,corneal curvature in the flatter meridian was (43.34±1.15)D and in the steeper meridian was (44.35±1.48)D,after OK for 1 year,it was (43.11±1.20)D and (43.82±1.80)D,and the difference was significance (P ＜0.05); after 2 years,corneal curvature in the flatter meridian was (43.11±1.52)D and in the steeper meridian was (43.73±1.77)D,compared with baseline,the difference was significance (P ＜0.05).Compared with baseline,residual flattening of the cornea was found after OK wearing for 1 year,averaging (0.24±0.42)D in the flat meridian and (0.32±0.44)D in the steeper median; but the residual flattening of the cornea was found after OK wearing for 2 years,averaging (0.27±0.46)D in the flat meridian and (0.34±0.69)D in the steeper meridian,and the difference had no significance (P ＞0.05).Conclusions After wearing OK for 1 year in high myopia eyes,it prevents myopian increasing completely; after 2 years,it also prevents myopian increasing partially.Compared with baseline,slight and lasting flattening of the cornea is found after OK wearing for 1 year and 2 years,and this kind of flatten changes keep stable within the 2 years.