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对２４例（３６只眼）行准分子激光原位角膜磨镶术（ｅｘｃｉｍｅｒｌａｓｅｒｉｎｓｉｔｕｋｅｒａｔｏｍｉｌｅｕｓｉｓ，ＬＡＳＩＫ）后屈光欠矫的患眼，再行原瓣下准分子激光角膜切削术。其中２只眼在ＬＡＳＩＫ术后１个月内施行，３４只眼在术后３～５个月内施行。３６只眼行ＬＡＳＩＫ前的屈光度数为：－５．００～－１７．８７Ｄ，平均－１０．７５±３．４１Ｄ，ＬＡＳＩＫ后欠矫的度数为：－１．２５～－５．５０Ｄ，平均－３．１２±１．１６Ｄ。再手术后，随诊３～６个月。２６只眼（７２．２％）的裸眼视力达到术前矫正视力，２只眼的裸眼视力较术前矫正视力增加一行，８只眼的矫正视力较术前下降一行。术后角膜瓣平整，角膜界面清晰，因此，ＬＡＳＩＫ后屈光欠矫可于术后３～６个月内于原角膜瓣下的基质层再行准分子激光角膜切削术，手术简便、安全、有效。
Twenty - four eyes (36 eyes) underwent refractive subarachnoid keratomileusis after excimer laser in situ keratomileusis (LASIK). Two of them were performed within 1 month after LASIK and 34 were performed within 3 to 5 months after surgery. 36 eyes before LASIK refraction: -5.00 ~ -17.87D, an average of -10.75 ± 3.41D, after LASIK degree of undercorrection: -1.25 ~ -5.50D, the average -3.12 ± 1.16D. After surgery, follow-up 3 to 6 months. The uncorrected visual acuity of 26 eyes (72.2%) reached preoperatively corrected visual acuity. The visual acuity of uncorrected visual acuity of two eyes increased by one line, while that of 8 eyes decreased by one line. Postoperative corneal flap formation, corneal clear interface, therefore, after LASIK refractive undercorrection within 3 to 6 months after the original corneal flap under the stroma re-excimer laser keratomileusis surgery, the operation is simple and safe, effective.