Retreatment of regression after photorefractive keratectomy for myopia.
OBJECTIVE
To study results of retreatment after regression in myopic patients who underwent photorefractive keratectomy (PRK).


METHODS
Procedures were performed with the Nidek EC-5000 excimer laser. This was a retrospective study of 20 of 2127 patients, with follow-up of at least 6 months, who underwent repeated excimer laser ablation.


RESULTS
No patient with low myopia had regression. We evaluated six eyes (group I) with moderate myopia; 13 eyes (group II) with high myopia; and ten eyes (group III) with extreme myopia. Average uncorrected visual acuity at 6 months after retreatment was 0.73 +/- 0.21 in group I, 0.64 +/- 0.35 in group II, and 0.61 +/- 0.38 in group III. At six months after retreatment, the average was -0.36 +/- 1.05 D in group I, -0.42 +/- 1.12 D in group II, and -1.40 +/- 1.62 D in group III.


CONCLUSIONS
The amount and frequency of regression was higher in patients with high and extreme myopia; however, the preliminary results of retreatment of regression were satisfactory.
Vorotnikova
E K
EK
New Line Vision Ophthalmology Research Center, Moscow, Russia.
Kourenkov
V V
VV
Polunin
G S
GS
D000328:Adult; D003315:Cornea / Q000601:surgery*; D006801:Humans; D054018:Lasers, Excimer; D009216:Myopia / Q000601:surgery*; D018903:Photorefractive Keratectomy; D012008:Recurrence; D012086:Reoperation; D012189:Retrospective Studies; D016896:Treatment Outcome; D014792:Visual Acuity