Clinical comparative study of Ultra-thin flap LASIK and LASEK for the treatment of high myopia with relative thin cornea

Objective To compare the subjective symptom,curative effect,efficacy and safety of the ultra-thin flap LASIK and LASEK for the treatment of high mypia with relative thin cornea.Methods 100 eyes of 50 cases with high mypia with relative thin cornea were divided into two groups.50 eyes of 25 cases received ultra-thin flap LASIK were included in group A.50 eyes of 25 cases received LASEK were included in group B.The mean preoperative spherical equivalent was -7.18D(range from -6.00～-10.0D)and -7.15D (range from -6.00～-10.0D)respectively.The subject symptom,degree of satisfaction,uncorrected visual acuity,best corrected visual acuity,spherical equivalent and complications were observed and compared during after surgery.Results The average flap thickness was(96.76± 5.54)μ m.Postoperative visual acuity of group A recovered faster with less steroid use than of group B.The degree of satisfaction of guoup A is bettet than group B.There were no threatening complications for vision in both group.The main complications were haze and regression in group B.Postoperative reaction was mild in group A patients,who showed a quick recovery in UCVA.Conclusion Moria-M2-90-mikrokeratome is fit for LASIK with ultra-thincorneal flaps.LASIK with ultra-thin corneal flaps for high myopia with relative thin cornea is safe,effective and comfortable.LASIK with ultra-thin corneal flaps may be better than LASEK.It needs further clinical study with larger scale and longer follow-up. Key words: Ultra-thin flap LASIK; LASEK; High myopia; Cornea