The quantitative relationship between the pupillary reflex feature of retinoscopy and its refractive diopter has been studied by means of combining the S-picture system with the further mathematical and optical method...The quantitative relationship between the pupillary reflex feature of retinoscopy and its refractive diopter has been studied by means of combining the S-picture system with the further mathematical and optical methods.A series of new formulas on retinoscopy has been set up for the first time. The correlation coefficient of the results obtained by formula calculation,photograph analysis and retinoscopy on 2000 eyes is -0.93,-0.97 and -0.95 respectively(P<0. 01 ),indicating the negative relationship between the value of the feature's character parameter and its diopter. There is no difference between the 3 groups(X2 test P>0. 05). These new formulas and findings develop the theories of retinoscopy and provide a more speedy and accurate strategy for clinical practice,making it possible to create a new automatic retinoscopic instrument.展开更多
AIM： To observe the changes of vitreous cavity length and diopter after scleral encircling（SE） produce.·METHODS： This prospective study included 68 eyes of68 non-consecutive patients with macula-off retinal d...AIM： To observe the changes of vitreous cavity length and diopter after scleral encircling（SE） produce.·METHODS： This prospective study included 68 eyes of68 non-consecutive patients with macula-off retinal detachment who were operated by SE surgery. The corneal refractive power, ocular axial length and diopter were measured by keratometer, A-mode ultrasonic meter and computed dioptometer.· RESULTS： There was no significant difference in corneal refractive power among preoperative and post operative 1, 3 and 6mo（0.57±0.54 D at pre-surgery; 0.72±0.26 D at 1mo; 0.71 ±0.34 D at 3mo; 0.69 ±0.31 D at 6mo;all P 〉0.05）. Axial lengths were obviously lengthened,especially in vitreous cavity length（17.87 ±3.09 mm,19.69 ±3.12 mm, 18.97 ±3.56 mm, 18.76 ±3.47 mm, 18.68 ±3.42 mm at pre-surgery, 1wk, 1, 3 and 6mo postoperatively,P 〈0.05） and diopter also increased at beginning and then recovered gradually. After 1 and 3 mo, axial length（vitreous cavity length） and myopia were more and in higher degree than before surgery.·CONCLUSION： The change of postoperative vitreous cavity length is the main factor that results in the changes of axial length and then makes the change of diopter.展开更多
文摘The quantitative relationship between the pupillary reflex feature of retinoscopy and its refractive diopter has been studied by means of combining the S-picture system with the further mathematical and optical methods.A series of new formulas on retinoscopy has been set up for the first time. The correlation coefficient of the results obtained by formula calculation,photograph analysis and retinoscopy on 2000 eyes is -0.93,-0.97 and -0.95 respectively(P<0. 01 ),indicating the negative relationship between the value of the feature's character parameter and its diopter. There is no difference between the 3 groups(X2 test P>0. 05). These new formulas and findings develop the theories of retinoscopy and provide a more speedy and accurate strategy for clinical practice,making it possible to create a new automatic retinoscopic instrument.
基金Supported by the Natural Science Foundation of Anhui Province(No.1508085MH188)Science Foundation of Anhui Provincial health Bureau(No.13zc046)
文摘AIM： To observe the changes of vitreous cavity length and diopter after scleral encircling（SE） produce.·METHODS： This prospective study included 68 eyes of68 non-consecutive patients with macula-off retinal detachment who were operated by SE surgery. The corneal refractive power, ocular axial length and diopter were measured by keratometer, A-mode ultrasonic meter and computed dioptometer.· RESULTS： There was no significant difference in corneal refractive power among preoperative and post operative 1, 3 and 6mo（0.57±0.54 D at pre-surgery; 0.72±0.26 D at 1mo; 0.71 ±0.34 D at 3mo; 0.69 ±0.31 D at 6mo;all P 〉0.05）. Axial lengths were obviously lengthened,especially in vitreous cavity length（17.87 ±3.09 mm,19.69 ±3.12 mm, 18.97 ±3.56 mm, 18.76 ±3.47 mm, 18.68 ±3.42 mm at pre-surgery, 1wk, 1, 3 and 6mo postoperatively,P 〈0.05） and diopter also increased at beginning and then recovered gradually. After 1 and 3 mo, axial length（vitreous cavity length） and myopia were more and in higher degree than before surgery.·CONCLUSION： The change of postoperative vitreous cavity length is the main factor that results in the changes of axial length and then makes the change of diopter.
文摘目的 探讨不同屈光度近视青少年儿童应用角膜塑形镜的近视控制效果及安全性。方法 选取2021年2月至8月于南京医科大学附属江宁医院接受角膜塑形镜治疗的93例(171眼)近视患者为研究对象,根据等效球镜度数将其分为低度数组(88眼,–0.5D至–3.0D)和中度数组(83眼,–3.0D至–6.0D)。比较两组戴镜前后的裸眼远视力、屈光度、眼轴、泪膜破裂时间(breakup time of tear film,BUT)、角膜内皮细胞计数及并发症。结果 戴镜1年后,低度数组眼轴增长显著大于中度数组(Z=–2.035,P=0.042)。戴镜1年后,两组的裸眼远视力均显著高于本组戴镜前(P<0.05),中度数组的视力增长幅度显著大于低度数组(P<0.05);两组的等效球镜度数均显著小于本组戴镜前(P<0.05),中度数组的等效球镜度数减少幅度显著大于低度数组(P<0.05)。戴镜1年后,两组的BUT均显著短于本组戴镜前,角膜内皮细胞计数均少于本组戴镜前(P<0.05),但两组的BUT和角膜内皮细胞计数比较差异均无统计学意义(P>0.05)。两组患者的并发症发生率比较差异无统计学意义(χ^(2)=2.000,P=0.157)。结论 角膜塑形镜对不同屈光度近视青少年儿童均有良好的控制效果和安全性,而对中度近视的效果更为突出。
