Abstract

Different designs for contact lenses can result in insufficient oxygen permeability of the lenses. Moreover, the contact lens wearing schedule, replacement, lens care systems, and purchase methods are all important considerations for contact lens wearers. To evaluate the influence of tinted contact lenses with the pigment layer in different locations on the tear quality and ocular surface properties, as well as the subjective experience of the wearer In this randomized double-blind study, 30 healthy subjects (60 eyes) were randomly assigned to two groups. The pigment layer of lenses in group I was embedded within the matrix, close to the front surface, while that in group II was located on the front surface of the lens. Subjects wore the contact lenses for 7 days, 8 h a day. In both groups, the frequency of blinking after lens wear increased significantly relative to that before lens wear. The tear-breakup time was significantly shorter in group II than in group I. Temporal bulbar conjunctiva, nasal bulbar conjunctiva, temporal limbal, nasal limbal, and eyelid redness levels in both groups, and corneal staining levels in group II, were significantly increased after 7-day lens wear. Nasal bulbar conjunctiva, temporal limbal, and nasal limbal redness; eyelid smoothness; and corneal staining levels were significantly higher in group II. There was no significant between-group difference in the subjective experience. Ocular surface properties deteriorated while the frequency of blinking increased after wear of both types of tinted contact lenses for 7 days. Both designs resulted in insufficient oxygen permeability of the contact lenses.

摘要

隐形眼镜的不同设计会导致隐形眼镜的透氧性不足。此外，对于隐形眼镜佩戴者来说，隐形眼镜的佩戴时间表，更换，镜片护理系统和购买方法都是重要的考虑因素。评估在不同位置带有颜料层的有色隐形眼镜对泪液质量和眼表特性的影响以及佩戴者的主观体验在这项随机双盲研究中，随机抽取30名健康受试者（60眼）分配给两个组。第一组的镜片颜料层嵌入基质中，靠近前表面，而第二组的颜料层位于镜片的前表面。受试者戴隐形眼镜7天8天。在两组中 戴眼镜后的眨眼频率比戴眼镜前的眨眼频率显着增加。II组的泪液破裂时间明显短于I组。两组的颞球结膜，鼻球结膜，颞缘，鼻缘和眼睑发红水平均显着升高，而II组的角膜染色水平在术后显着增加。 7天配戴眼镜。鼻球结膜，颞缘和鼻缘红肿；眼睑光滑度; 和角膜染色水平在第二组显着更高。组间主观体验无显着差异。两种类型的有色隐形眼镜配戴7天后，眼表特性下降，而眨眼频率增加。两种设计均导致隐形眼镜的透氧性不足。