Hiraoka Takahiro, Ishii Yuko, Okamoto Fumiki, Oshika Tetsuro
Department of Ophthalmology, Institute of Clinical Medicine, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki, 305-8575, Japan.
Graefes Arch Clin Exp Ophthalmol. 2009 Feb;247(2):225-33. doi: 10.1007/s00417-008-0973-6. Epub 2008 Oct 25.
To investigate the influence of cosmetically tinted soft contact lenses on ocular higher-order aberrations and visual performance, and to analyze the relationship between these parameters after the lens wear.
In 44 eyes of 22 subjects, visual acuity, contrast sensitivity under photopic and mesopic conditions, and ocular higher-order aberrations were evaluated before and after wearing the tinted soft contact lenses (1-day Acuvue Colours; Vistakon, Jacksonville, FL). Contrast sensitivity under a photopic condition was determined at 3, 6, 12, and 18 cycles per degree, and the area under the log contrast sensitivity function (AULCSF) was calculated. Mesopic contrast sensitivity with and without glare was assessed. Ocular higher-order aberrations for a 4-mm pupil were measured, and coma-like, spherical-like, and total higher-order aberrations were determined.
The tinted contact lens wearing resulted in significant decreases in log contrast sensitivity at all spatial frequencies (P < 0.05) and AULCSF (P < 0.0001), although 100% contrast visual acuity did not change. Log mesopic contrast sensitivity with and without glare was also reduced significantly by the lens wear (P < 0.0001). The contact lens wear significantly increased coma-like, spherical-like, and total higher-order aberrations (P < 0.0001). The induced changes in higher-order aberrations were analyzed in relation to the changes in contrast sensitivity function. Although the changes in coma-like and spherical-like aberrations did not correlate significantly with those in AULCSF (P > 0.05), the changes in total higher-order aberrations showed a significant correlation with those in AULCSF (P < 0.05). On the other hand, there was no significant relationship between the changes in higher-order aberrations and the changes in log mesopic contrast sensitivity with and without glare (P > 0.05).
Cosmetically tinted contact lenses increase ocular higher-order aberrations and worsen contrast sensitivity under both photopic and mesopic conditions. Increases in higher-order aberrations are responsible for decreased contrast sensitivity under the photopic condition. Tinted contact lens wearers should be sufficiently informed about the possible reduction in optical quality of the eye and quality of vision.
研究美容染色软性隐形眼镜对眼高阶像差和视觉性能的影响，并分析佩戴镜片后这些参数之间的关系。
对22名受试者的44只眼睛，在佩戴染色软性隐形眼镜（1日抛的酷视彩色隐形眼镜；美国眼力健公司，佛罗里达州杰克逊维尔）前后评估视力、明视觉和中间视觉条件下的对比敏感度以及眼高阶像差。在每度3、6、12和18周期间测定明视觉条件下的对比敏感度，并计算对数对比敏感度函数下的面积（AULCSF）。评估有无眩光时的中间视觉对比敏感度。测量4毫米瞳孔的眼高阶像差，并确定类彗差、类球差和总高阶像差。
佩戴染色隐形眼镜导致所有空间频率下的对数对比敏感度（P < 0.05）和AULCSF（P < 0.0001）显著降低，尽管100%对比度视力没有变化。佩戴镜片也显著降低了有无眩光时的对数中间视觉对比敏感度（P < 0.0001）。佩戴隐形眼镜显著增加了类彗差、类球差和总高阶像差（P < 0.0001）。分析高阶像差的诱发变化与对比敏感度函数变化的关系。尽管类彗差和类球差的变化与AULCSF的变化无显著相关性（P > 0.05），但总高阶像差的变化与AULCSF的变化呈显著相关性（P < 0.05）。另一方面，高阶像差的变化与有无眩光时的对数中间视觉对比敏感度的变化之间无显著关系（P > 0.05）。
美容染色隐形眼镜会增加眼高阶像差，并在明视觉和中间视觉条件下恶化对比敏感度。高阶像差的增加是明视觉条件下对比敏感度降低的原因。应充分告知染色隐形眼镜佩戴者眼睛光学质量和视觉质量可能下降的情况。
