摘要
背景硬性透氧性（RGP）角膜接触镜作为一种新兴的矫正屈光不正的方法已广泛使用，但是否会引起眼球光学系统的改变从而对视觉质量产生影响尚不确定。目的评价和比较采用RGP角膜接触镜矫正与采用框架眼镜矫正后中低度近视眼视觉质量改善的效果。方法纳入35例68眼中低度近视患者，比较配戴框架眼镜和配戴RGP角膜接触镜3个月后受试眼的波阵面像差和明环境、暗环境中不同对比度（10％、30％、40％、52％、76％、92％）下视力的差异。结果受试眼配戴RGP角膜接触镜后平均最佳矫正视力（BCVA）为1．26＋_0．03，优于配戴框架眼镜的0．94±0．10，差异有统计学意义（t=-9．266，P=0．000）。受试眼配戴RGP角膜接触镜后的总高阶像差较配戴前明显下降，差异有统计学意义（t=4．683，P=0．000），其中以3～4阶像差下降为主（RMS3：t=4．656，P=0．000；RMS4：t=3．929，P=0．000），而RGP角膜接触镜配戴前后受试眼5～6阶像差的差异均无统计学意义（RMS5：t=1．766，P=0．083；RMS6：t=1．150，P=0．256）。在明环境、暗环境中，受试眼在不同对比度下配戴RGP角膜接触镜的视力均明显好于配戴框架眼镜，差异均有统计学意义（均P〈0．05）。在相同环境条件下，随着视标对比度的下降，视力随之下降，但在相同矫正方式和对比度下，受试眼在明环境下与暗环境下的视力值均非常接近。结论中低度近视患者配戴RGP角膜接触镜的视觉质量好于配戴框架眼镜。
Background Rigid gas permeable （RGP） contact lens,as a kind of new correction of refraction error,has been wildly used,but whether it will cause eye optical system of the change and influence on the visual acuity is unclear. Objective Present study was to evaluate and compare the visual quality of low to moderate myopia following wearing of RGP contact lens and spectacles. Methods Sixty-eight eyes of 35 subjects with low or mediate myopia were included in this study. Wave-front aberrations and visual aeuities under the different contrasts （ 10% ,30% ,40% ,52% ,76% ,92% ） in the light or dark environment were examined before and 3 months after wearing of RGP corneal contact lens. These parameters were compared with those after wearing of spectacles with paired t test. Results The best corrected visual acuity （BCVA） was improved significantly from 0. 94±0. 10 to 1.26±0. 03 3 months after wearing of RGP corneal contact lens （t =-9. 266, P = 0. 000）. After fitting of RGP corneal contact lens, the total higher order wave-front aberrations, the 3rd and 4th order aberrations were significantly declined in comparison with those of before fitting （ total ： t = 4. 683, P = 0. 000 ; RMS3 ： t = 4. 656, P = 0. 000 ; RMS4 ： t = 3. 929, P=0. 000）. However, no significant differences were detected in the 5th and 6th order aberrations between RGP corneal contact lens fitting and spectacles wearing （ RMS5 ： t = 1. 766, P = 0. 083 ; RMS6 ： t = 1. 150, P = 0. 256 ）. In both bright and dark environments, BCVA values were much better in the eyes with RGP corneal contact lens wearing than that in the eyes with spectacles wearing （ all P〈0.05 ）. The BCVA was always reduced with the decline of contrast level whether bright or dark backgrounds both in RGP corneal contact lens wearing eyes and spectacles wearing eyes. Conclusions Wearing of RGP corneal contact lens provides better visual quality for low to moderate myopia than the spectacles wearing.
出处
《中华实验眼科杂志》
CAS
CSCD
北大核心
2013年第6期568-571,共4页
Chinese Journal Of Experimental Ophthalmology
关键词
硬性透氧性角膜接触镜
近视
波阵面像差
对比度视力
Rigid gas permeable contact lens
Myopia
Wavefront aberration
Contrast visual acuity
