《Table 2 Preoperative and postoperative data of all patients》

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《Clinical outcomes after implantation of a new intrastromal corneal ring with 140-degree of arc in patients with corneal ectasia》

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CDVA:Corrected distance visual acuity；K1:Mean flattest axis；K2:Mean steepest axis；Km:Average keratometry.

Fifty eight eyes/patients were evaluated.The average followup was 16.81±10.8mo.The mean age was 33.3±13.2y.Forty six patients（79.3%）were male，and twelve patients（20.7%）were female.Considering the analysis by groups，in group 1（17 eyes）2 segments of 200μm（140/200）were implanted；in group 2（30 eyes）a single 150μm segment（140/150）was implanted and in group 3（11 eyes）a single 200μm segment（140/200）was implanted（Table 1）.