Objective To evaluate the changes in binocular vision after phakic posterior chamber implantable collamer lens （PPC-ICL） implantation for high myopia. Methods This self-control study included 84 eyes of 42 patients with high myopia who underwent PPC-ICL implantation surgery. Simultaneous perception， fusion range， and distance and near stereopsis were tested before and 6 months after surgery with a synoptophore and stereogram designed by Yan Shaoming. Results There was no significant difference in simultaneous perception before surgery compared to 6 months after surgery， while the differences in fusion range and distance stereopsis were statistically significant （χ²=0.357， P<0.01 and χ²=0.276， P<0.05）. There were no significant differences in foveal stereopsis and peripheral stereopsis before surgery compared to 6 months after surgery， but there was a significant difference in stereo blindness （χ²=0.279， P<0.05）. Conclusion Simultaneous perception， fusion range， and distance and near stereopsis after PPC-ICL implantation obviously improved compared to measurements taken before surgery.