Analysis of visual acuity improvement and related factors for myopia patients after Femtosecond flap excimer laser surgery / 实用医学杂志

Objective To investigate the visual acuity improvement and related factors for myopia after femtosecond flap excimer laser surgery. Methods 72 myopic patients (129 eyes) in our hospital between January 2010 and December 2013 were chosen. The patients all received femtosecond flap excimer laser surgery. The visual acuity improvement after surgery was observed, and the influencing factors were analyzed. Results The distance vision (VA), near vision (NVA) and best corrected visual acuity (BCVA) significantly increased before surgery (P<0.05). Logistic regression analysis showed that preoperative BCVA, NVA, axial length, cutting ratio, axial length and time of near vision were the affecting factors of visual acuity (P<0.05). Conclusion Femtosecond flap excimer laser surgery for myopia has significant effect , but the preoperative visual acuity was affected by BCVA , NVA, cutting ratio, axial length and time of near vision.

The development of the applications of ocular response analyzer in excimer laser surgery / 眼科研究

Research on the application of ocular response analyzer has become one of the main issues in ophthalmology.The ocular response analyzer has been used in the measurement of ocular bioparameters of glaucoma,cataract,heretability and refractive surgery.As a newly invented non-contact tonometric device,the ocular response analyzer is helpful not only in the measurement of intraocular pressure (IOP),but also in the determination and calculation of two corneal biomechanical properties:corneal hysteresis (CH) and corneal resistance factor (CRF).It offers the possibility of measuring corneal biomechanical properties in vivo.This article primarily reviewed the application of the ocular response analyzer in terms of pre-operative examination and post-operative follow-up in excimer laser surgery.

Penetrating keratoplasty after excimer laser surgery.

We present six patients who were referred after undergoing excimer laser surgery and subsequently required penetrating keratoplasty (PKP) to correct complications of the initial surgery. The excimer laser procedures included 5 cases of astigmatism and 1 case of hyperopic correction. All cases had complications, which decreased visual function and could not be corrected by non-surgical methods. Five cases had severe corneal haze and one case had an acute perforation following excimer laser surgery. After PKP, all patients had a best-corrected visual acuity (BCVA) which varied from 20/30 to 20/20. Awareness of potential complications, which need PKP after excimer laser surgery, is necessary.