AIM:To observe the changes of anterior segment after implantation of the implantable collamer lens(ICL)for high myopia by Pentacam anterior segment system.METHODS:Eight patients 12 eyes with myopia were implanted ICL in our hospital from October 2009 to February 2010.The mean follow-up was 3.8 months.UCVA,BCVA,intraocular pressure,spherical equivalent(SE) were measured.ICL position was observed by Pentacam.Anterior chamber depth was observed.RESULTS:The postoperative UCVA was better than the BCVA of preoperative(t=2.237,P=0.047).Following up 3 months,the vault was 0.34-0.74mm(average 0.52±0.11mm),the average depth of anterior chamber was 2.39±0.18(2.01-2.67)mm was less than that of preoperative which was 3.24±0.11(3.01-3.46) mm.There were no serious complications.CONCLUSION:ICL implantation is a safe,efficacy,predictable and stable method in correcting high myopia.