The comparison of vision quality and corneal flap after LASIK with Intralase femtosecond laser and Ziemer LDV laser

Yu Ye

Objective: To compare vision quality and corneal flap of LASIK with Intralase femtosecond laser and Ziemer LDV laser.

Methods: Ten eyes of five patients were treated with LASIK, four eyes of two patients undergoing Intralase femtosecond laser with a MRSE of -6.09±0.89D, while six eyes of three patients undergoing Ziemer LDV laser with a MRSE of -7.06±1.99D. The corneal flap was set at 110 um. UCVA, BSCVA, aberrations and contrast sensitivity visual acuity were measured at one month, three month, twelve month postoperative and before surgery. The thickness of 7 measuring points across flaps were measured at 1 month postoperatively by Visante OCT.

Results: All the patients got a good postoperative UCVA not worse than 1.0. There was no significant difference between two groups in contrast sensitivity visual acuity after surgery. The spherical aberration was significant increased (p<0.05) in both groups at one month, three month and twelve month postoperative, while there was no significant difference between two groups in total HOAs, S3, Trefoil and SA. The mean corneal flap thickness at the top with Intralase group was 113±14um and 114±6um with Ziemer LDV group respectively at one month postoperative. The mean deviation of corneal flap thickness at the top with Intralase group was 3±14um and 4±6um with Ziemer LDV group. The mean deviation of flap thickness at temple and nasal 1mm of two groups showed a significant difference (p<0.05).

Conclusion: The vision quality of LASIK with both Intralase femtosecond laser and Ziemer LDV laser was good. The two femtosecond lasers were both regularly and accurately in making corneal flaps.