Clinical observation of laser refractive surgery for refractive errors after penetrating eye injuries

Abstract

Objective To evaluate the clinical efficacy,safety and predictability of laser refractive surgery for refractive errors after penetrating eye injuries.Methods It was a retrospective case series study.Twenty five eyes of 25 cases at the age of 21 to 37 yrs.were studied.They were treated by LASEK & LASIK.The eyes manifested uncorrected visual acuity(UCVA) of 0.05 ～0.3,best corrected visual acuity (BCVA) of 0.6 ～ 1.0,spherical diopter (SD) of + 3.5 D ～-4.0 D,cylinder diopter(CD) of + 5.0 D ～-5.0 D.The ametropia was result of penetrating eye injuries,in which 14 eyes only had corneal scar caused by corneal or corneoscleral perforation,the other 11 eyes combined with cataract extraction and intraocular lens (IOL) implantation at the same time for traumatic cataract.All eyes were followed up for 6 months.The UCVA,BCVA and diopter were examined before surgery and 1 m,3m and 6m postoperatively.Results There were 22 eyes(88.0％),24 eyes(96.0％),25 eyes(100％) got UCVA more than 0.5 at 1m,3m and 6m after surgery,respectively.One month after surgery,the BCVA of 20 eyes (80.0％) reached or surpassed the preoperative one,3 eyes(12.0％) declined one line and 2 eyes (8.0％) declined two lines.Three months after surgery,the BCVA of 22 eyes (88.0％) reached or the surpassed the preoperative one,2 eyes (8.0％) declined one line and 1 eye (4.0％) declined two lines.Six months after surgery,the BCVA of 24 eyes (96.0％) reached or surpassed the preoperative one,only 1 eye (4.0％) declined one line.At 1m,3m and 6m after surgery,the SD within ±0.5D was 84.0％,84.0％,80.0％ respectively,and within ± 1.0D were 100％,100％,96.0％ respectively.The CD within ± 0.5D was 80.0％,80.0％,76.0％,respectively,and within ± 1.0D was 92.0％,96.0％,92.0％ respectively.Conclusion Laser refractive surgery is efficient,safe and predictable for refractive errors caused by penetrating eye injuries.The indications must be selected reasonably and the surgical procedures also needed further investigation. Key words: Surgery,corneal,laser ; Injury, eye,penetrating ; Myopia; Hypermetropia; Astigmatism