Long-term visual quality after verisyse iris-fixated phakic intraocular lens implantation
Objective To assess the long-term visual quality after verisyse phakic intraocular lens(Verisyse PIOL) implantation for correction of high myopia.Methods Long-term(mean 4.5 years) retrospective follow-up study.Forty eyes of 20 patients who underwent Verisyse PIOL implantation for correction of high myopia were chosen.The uncorrected visual acuity(UCVA),best spectacle-corrected visual acuity(BSCVA),spherical equivalent(SE),astigmatism before and after operation at 4.5 years were observed,and the satisfaction of patient was investigated.Results At postoperative 4.5 years,UCVA in 34 eyes(87.2%) were equal to or better than 0.5,BSCVA in 39 eyes(100.0%) were equal to or better than 0.5,there were significant differences compared with pre-operation(t=15.73,6.52,P=0.00,0.00),but no statistical difference compared with those at postoperative 1 month(t=0.70,1.71,P=0.49,0.10).There were significant differences in UCVA and BSCVA between postoperative 1 month and pre-operation(t=15.94,6.38,P=0.00,0.00).At postoperative 4.5 years,UCVA in 28 eyes(70.0%) were equal to or better than preoperative BSCVA,and 5 eyes(12.5%) lost more than 2 Snellen lines of BSCVA.SE was(-0.34±0.35)D(from 0 to-1.25 D),there was no statistical difference compared with preoperative 1 month(t=0.25,P=0.80),SE in 38 eyes were from 0 to-1.0 D.The mean intraocular pressure remained stable,which was(14.83±1.91)mmHg(from 11 mmHg to 19 mmHg,1 kPa=7.5 mmHg).Patients satisfaction questionnaire showed the whole satisfaction of all patients were high.Conclusion Verisyse PIOL for high myopia is safe and effective with predictability,and the long-term curative effects are stable with no severe complication.