Laser in situ keratomileusis after penetrating keratoplasty.
OBJECTIVE
To determine the safety, efficacy, predictability, and stability of laser in situ keratomileusis (LASIK) to correct myopia and myopic astigmatism in eyes with prior penetrating keratoplasty.


METHODS
Eight eyes of 8 patients with penetrating keratoplasty had significant postoperative refractive error. Each eye received LASIK 1 year or more after penetrating keratoplasty. All were followed for 6 months or more. All patients were treated with the Chiron Technolas 217 excimer laser and the Automated Corneal Shaper microkeratome.


RESULTS
Mean spherical equivalent refraction decreased from -4.50 D (range, -3.00 to -7.25 D) to -0.75 D (range, -1.50 to +0.50 D) and the mean preoperative astigmatism decreased from 3.50 D (range, 1.50 to 5.00 D) to 1.25 D (range, 0.75 to 2.00 D). Uncorrected visual acuity improved by at least two Snellen lines in all eyes. Best spectacle-corrected visual acuity did not change in four eyes (50%) and improved in three eyes (37.5%).


CONCLUSIONS
LASIK effectively reduced low and moderate myopia and myopic astigmatism following penetrating keratoplasty.
Goiania Eye Institute, Department of Cornea and Refractive Surgery, GO, Brazil. nassaral@zaz.com.br
B R
BR
Nassaralla
J J
JJ
Nassaralla
D001251:Astigmatism / Q000175:diagnosis / Q000209:etiology / Q000601:surgery*; D002452:Cell Count; D003315:Cornea / Q000033:anatomy & histology / Q000601:surgery; D019781:Corneal Topography; D004728:Endothelium, Corneal / Q000166:cytology; D005260:Female; D006801:Humans; D020731:Keratomileusis, Laser In Situ; D015948:Keratoplasty, Penetrating / Q000009:adverse effects*; D008297:Male; D009216:Myopia / Q000175:diagnosis / Q000209:etiology / Q000601:surgery*; D012086:Reoperation; D014792:Visual Acuity