Koffler Bruce H, Smith Vivien M
Kentucky Center for Vision, 120 North Eagle Creek Drive, Suite 431, Lexington, KY 40509, USA.
Eye Contact Lens. 2004 Oct;30(4):223-6; discussion 230. doi: 10.1097/01.icl.0000140228.24461.1b.
The Paragon corneal refractive therapy (CRT) lens provides a temporary reduction in myopia by molding the cornea while sleeping. This study presents our initial experience in 20 patients fit with the CRT lens.
Myopic patients with a spherical correction between -1.00 and -7.75 diopters (D) and astigmatism less than 1.62 D were fit and followed for an average of 5.1 months.
Patients whose initial refraction was between -1.00 and -3.00 D achieved an average of 1.50 D myopic correction; those between -3.25 and -6.00 achieved an average of 2.9 D myopic correction; and those greater than -6.00 D averaged 5.8 D of correction. Uncorrected visual acuity improved an average of 7.7 lines. One hundred percent achieved 20/40 or better vision, and 55% achieved 20/20 vision. Fifty-five percent were within 0.50 D of plano, and 84% were within 1.00 D of plano. There was an overall 80% success rate.
The CRT lens is an effective modality for temporary myopic correction for a restricted subset of myopic candidates. Those with a spherical manifest refraction between -1.00 and -6.00 D and up to 1.50 D of astigmatism can expect a good outcome with these lenses.
Paragon角膜屈光治疗（CRT）镜片通过在睡眠时塑形角膜来暂时降低近视度数。本研究介绍了我们为20例佩戴CRT镜片患者的初步经验。
为球镜矫正度数在-1.00至-7.75屈光度（D）之间且散光小于1.62 D的近视患者验配镜片，并平均随访5.1个月。
初始验光度数在-1.00至-3.00 D之间的患者平均近视矫正度数为1.50 D；-3.25至-6.00 D之间的患者平均近视矫正度数为2.9 D；大于-6.00 D的患者平均矫正度数为5.8 D。未矫正视力平均提高了7.7行。100%的患者达到了20/40或更好的视力，55%的患者达到了20/20的视力。55%的患者屈光度在平光±0.50 D以内，84%的患者屈光度在平光±1.00 D以内。总体成功率为80%。
对于特定的近视患者群体，CRT镜片是一种有效的临时近视矫正方法。球镜显验光度数在-1.00至-6.00 D之间且散光高达1.50 D的患者使用这些镜片有望获得良好效果。
