One year follow-up of photoastigmatic keratectomy (PARK) with the VISX 20/20 excimer laser
Hamberg-Nyström, H.; Fagerholm, P.P.; Tengroth, B.M.; Viding, A.V.
Ophthalmic Surgery and Lasers 27(5 Suppl): S499-S502
1996
ISSN/ISBN: 1082-3069 PMID: 8724159 Document Number: 464626
One hundred thirteen eyes were treated with photoastigmatic keratectomy using the VISX 20/20 excimer laser. The results were evaluated after 1 year. The patients were divided into 2 groups, low astigmatism group with less than 2.00 diopters (D) of pre-operative astigmatism, the second group having 2.00 D or more. Astigmatism was reduced by 43.9% in the low astigmatic group and by 71.7% in the high astigmatic group. Eighty percent of the eyes in the low astigmatic group and 90% in the high astigmatic group achieved an uncorrected visual acuity of 20/40 (0.5) or better. Eighty-four percent in the low astigmatic group and 80% in the high astigmatic group were within +/- 1.00 D in spherical equivalent results. The mean spherical equivalent results were about -0.45 D in both groups using this algorithm. The results are very promising at this early stage of algorithm development.