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[Evaluations of extreme myopia correction with phakic posterior chamber intraocular lens and laser in situ keratomileusis].

PURPOSE
To compare and evaluate the efficacy, safety and stability of extreme myopia correction with Phakic Posterior Chamber Intraocular Lens (PPCIOL) Keratomileusis (Lasik). and Laser in situ


METHODS
This prospective study enrolled 43 cases of extreme myopia. The PPCIOL group was inserted Implantable Contact Lens (ICL) and Lasik group was done excimer laser scanning. The efficacy index and safety index were compared. The rate of regression postoperative was observed and the changes of low contrast vision and Glare vision were statistically studied.


RESULT
The mean spherical equivalent refraction of PPCIOL was (-16.77+/-3.37)D(-11.75 approximately -25.75 D)and that of Lasik was (-13.8+/-2.71) D (-9.37 approximately -23.75 D). There was no statistically difference between efficacy index of two groups postoperatively and a significant higher safety index in PPCIOL(P < 0.001) . The rate of regression was 0 in PPCIOL group and 32.56% in Lasik group (P< 0.001). The increase of low contrast vision and Glare vision from the baseline preoperative was more significant in PPCIOL group than which in Lasik group (P < 0.001). Two eyes of 1 PPCIOL case had anterior capsular cataract in 6 months postoperative. No other complication was found in two groups.


CONCLUSION
PPCIOL implantation is an efficient method for extreme myopia correction with more safety and stability, and provides good visual quality.