Comparison of IOP and corneal biomechanical changes after SMILE and FS-LASIK

Abstract

AIM:To evaluate the influence on corneal biomechanics after small incision lenticule extraction(SMILE)and Femto LDV laser flapping in laser in situ keratomileusis(FS-LASIK). METHODS: Preoperatively, 1mo after surgery, 101 patients(202 eyes)with myopia in each group respectively by SMILE and FS-LASIK were examined by ocular response analyzer(ORA). Parameters were compared between postoperative(1mo)and preoperative. Comparisons included the corneal thickness and corneal compensated intraocular pressure(Iopcc), Goldmann correlated IOP value(Iopg), corneal resistance factor(CRF), corneal hysteresis(CH). RESULTS: SMILE group: IOPcc, IOPg(1mo postoperatively, 13.84±2.22,10.81±2.52mmHg)significantly changed comparing with preoperative(16.15±2.90, 15.95±3.08mmHg; t=-13.58, -32.91; both Pt=-41.21, -24.03; both Pt=-10.09、-23.00; both Pt=-24.84, -18.90; both Pt=-0.351, -1.081; both PCONCLUSION: The postoperative corneal biomechanics and IOP measurements are lower than preoperative. SMILE are lower than FS-lasik in changes of CRF, CH.

Keywords

• femtosecond laser
• small incision lenticule extraction
• corneal biomechanics
• corneal biomechanics