Clinical study of topography-guided off-flap Epi-LASIK in treating traumatic corneal astigmatism

Abstract

AIM: To evaluate the visual performance of the patients with traumatic corneal astigmatism, after the treatment of topography guided off-flap epipolis laser in situ keratomileusi(off-flap Epi-LASIK).METHODS: This prospective clinical study was comprised of 21 eyes of 21 patients with irregular corneal astigmatism caused by trauma, they were treated by off-flap Epi-LASIK from July 2012 to December 2013. The data included uncorrected visual acuity(UCVA), best spectacle-corrected visual acuity(BSCVA), contrast sensitivity 1, 6mo before and after surgery; the healing area percentage of corneal epithelia, the healing time of corneal epithelia and pain score at 3d after surgery.RESULTS: Postoperative 1mo both UCVA and BSCVA were improved significantly than that before surgery(t=15.703, 4.351, Pt=6.867, P t=1.497, P=0.140). After surgery, mean spherical equivalent(SE)was reduced from -2.43±3.02D to -0.23±0.49D(PPP>0.05). Postoperative 6mo except the 3c/d spatial frequency, the remaining 3 spatial frequency contrast sensitivity compared with those before operation were significantly improved(PCONCLUSION: Topography-guided off-flap Epi-LASIK is safe and effective in treating the patients with traumatic corneal irregular astigmatism. The operation can improve both the contrast sensitivity and the visual performance.

Keywords

• off-flap Epi-LASIK
• traumatic corneal astigmatism
• visual performance