Vredevoogd L J, Litteral G, Bierly J R, Cordahi G
Department of Ophthalmology, University of Kentucky, Lexington, USA.
CLAO J. 1999 Jan;25(1):36-9.
We performed a qualitative and quantitative assessment of contact lens performance at 1 and 6 months among 24 patients enrolled in the Piggyback Bifocal Contact Lens Study.
We fit 24 presbyopic patients with the Piggyback Bifocal Contact Lens System (i.e., a plano soft lens with a 9.4 mm cutout portion on which a bifocal RGP lens rides or "piggybacks"). Patients were evaluated prior to inclusion in the study and then at one month and six months after obtaining their lenses. Evaluations included slit lamp examination, evaluation of visual acuity at near and distance, and subjective rating of the patients' comfort.
At one month, 61% of patients had Snellen acuities of 20/30 or better, 79% had near acuities of J2 or better, and 60% rated their comfort as good or very good. At six months, 100% of patients had Snellen acuities of 20/30 or better, 90% had near acuities of J2 or better, and 86% of patients rated their comfort as good or better. Twelve patients did not complete the study due to their decision to drop the study.
The Piggyback Bifocal Contact Lens System is a well-tolerated, satisfactory means of optical correction for the motivated presbyope.
我们对参加背负式双焦点隐形眼镜研究的24名患者在佩戴隐形眼镜1个月和6个月时的镜片性能进行了定性和定量评估。
我们为24名老花眼患者佩戴了背负式双焦点隐形眼镜系统（即一片有9.4毫米切口部分的平光软性镜片，上面搭载或“背负”一片双焦点硬性透气性隐形眼镜）。在患者纳入研究前进行评估，然后在他们佩戴镜片1个月和6个月后再次评估。评估内容包括裂隙灯检查、近视力和远视力评估以及患者舒适度主观评分。
1个月时，61%的患者斯内伦视力达到20/30或更好，79%的患者近视力达到J2或更好，60%的患者将其舒适度评为良好或非常好。6个月时，100%的患者斯内伦视力达到20/30或更好，90%的患者近视力达到J2或更好，86%的患者将其舒适度评为良好或更好。12名患者因决定退出研究而未完成该研究。
对于有意愿的老花眼患者，背负式双焦点隐形眼镜系统是一种耐受性良好且令人满意的光学矫正方式。
