Gussler J R, Litteral G, VanMeter W S
Department of Ophthalmology, University of Kentucky, Lexington 40536-0084.
CLAO J. 1991 Jul;17(3):160-3.
The Tangent Streak trifocal is a rigid gas permeable contact lens with horizontal segments for distance, intermediate, and near correction. We undertook a prospective clinical evaluation of the Tangent Streak trifocal to determine the efficacy of this lens in correcting presbyopic symptoms. Distance, intermediate, and near corrections were compared using visual acuity and contrast sensitivity charts in 25 presbyopic ametropes. Compared to the original bifocal correction, the Tangent Streak trifocal provided 21 of 25 of study patients (84%) with subjectively improved intermediate vision, while maintaining distance and near vision. Twelve of 16 dissatisified bifocal contact lens wearers (75%) were successfully fit with the Tangent Streak trifocal. This study shows that the Tangent Streak trifocal lens can effectively provide multifocal vision to presbyopic ametropes.
Tangent Streak三焦点镜片是一种硬性透气接触镜，带有用于远、中、近视力矫正的水平分段。我们对Tangent Streak三焦点镜片进行了一项前瞻性临床评估，以确定该镜片矫正老视症状的疗效。使用视力和对比敏感度图表，对25名老视屈光不正患者的远、中、近视力矫正情况进行了比较。与原来的双焦点矫正相比，Tangent Streak三焦点镜片在25名研究患者中有21名（84%）主观上的中间视力得到改善，同时保持了远视力和近视力。16名对双焦点隐形眼镜不满意的佩戴者中有12名（75%）成功适配了Tangent Streak三焦点镜片。这项研究表明，Tangent Streak三焦点镜片可以有效地为老视屈光不正患者提供多焦点视力。
