Phakic intraocular lens implantation(PIOL)is one of the primary surgery fashions for correcting high myopia.The evaluation of visual quality following the surgery,including visual activity,contrast sensitivity,aberration and corneal Q value,is very important.Researches showed that the visual quality of patients after tradition laser in situ keratomileusis(LASIK)decreased because of the alteration of corneal aspherieity by laser excision cornea；while compared with LASIK,implantation of implantable contact lenses(ICL)is popular due to its excellent safety,effectiveness,reversibility and fewer complication.The visual quality after ICL is also superior than that of LASIK.Therein,the surgical project will furthermore be recommend for the high myopia patients.The purpose is to find the optimal strategy for the high myopia patients to get the best visual quality.