PMID: 8972366Nov 1, 1996Paper

Enlargement of the photorefractive keratectomy optical zone

Journal of Cataract and Refractive Surgery
F A EgginkJ M den Boon

Abstract

To evaluate the safety and efficacy of a photorefractive keratectomy (PRK) re-treatment procedure that enlarges the optical zone and treats undercorrection. Rotterdam Eye Hospital and Medisch Centrum Alkmaar, The Netherlands. This study evaluated 16 eyes that had PRK for myopia with the Summit excimer laser that resulted in a mean undercorrection of -2.82 diopters (D). Patients also reported impaired night vision including difficulty in driving, halos, and stray light and ghost images. These phenomena persisted after spectacle correction of residual refractive error, necessitating further treatment with a larger ablation zone. With a VISX 20/20 excimer laser, the optical zone was enlarged to 6.0 mm and undercorrection treated with a 6.0 mm ablation. At 13.5 months after re-treatment, mean reduction in myopia was 1.70 D, resulting in a residual undercorrection of -1.08 D. In seven eyes, final refraction was within 1.00 D of emmetropia. Only two patients continued to report night-driving problems. Re-treating undercorrections combined with enlarging the ablation zone resulted in a reduction in myopia from a mean of 2.82 to 1.08 D. Subjective reports of halos and stray light images were decreased in all cases.

References

Sep 1, 1992·Archives of Ophthalmology·T SeilerT Pham
May 1, 1990·Archives of Ophthalmology·F E FantesM Savoldelli
Dec 1, 1983·American Journal of Ophthalmology·S L TrokelB Braren
Jul 1, 1994·Ophthalmology·R Gibralter, S L Trokel
Apr 15, 1994·American Journal of Ophthalmology·D EpsteinH Hamberg-Nyström

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Citations

Jan 9, 2004·Ophthalmology·Mihai Pop, Yves Payette
Dec 31, 2002·Survey of Ophthalmology·Nancy I Fan-PaulGeorge J Florakis
Jul 23, 1999·Survey of Ophthalmology·C Owsley, G McGwin
Aug 15, 2003·Ophthalmology·Steven C SchallhornLinda B Bourque
Apr 11, 2003·Journal of Cataract and Refractive Surgery·Yuan-Chieh LeeI-Jong Wang
Nov 3, 2004·Journal of Cataract and Refractive Surgery·Marian S MacsaiZac B Ravage
Mar 5, 2016·International Ophthalmology Clinics·Brad E KligmanWilliam J Dupps
Aug 30, 2008·Journal of Cataract and Refractive Surgery·Jayson D EdwardsJeff C Rabin
Oct 7, 2004·Ophthalmology·Madhavan S RajanJohn Marshall
Aug 18, 2004·Journal of Cataract and Refractive Surgery·John E ThordsenRichard Stutzman
Jul 17, 2009·Journal of Refractive Surgery·Graziano BricolaCarlo E Traverso

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