Results 161 to 170 of about 8,342 (218)

Excimer laser photorefractive keratectomy

American Journal of Ophthalmology, 1995
Excimer laser photorefractive keratectomy has been used for the correction of myopia, hyperopia and astigmatism. This laser removes tissue through a process termed photoablative decomposition, in which incident photon energy is sufficient to break molecular bonds.
T, Seiler, P J, McDonnell
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Photorefractive Keratectomy and Cataract

Survey of Ophthalmology, 1997
Fifty male albino rabbits were studied. Ten animals served as controls. Forty animals were prepared to receive photorefractive keratectomy (PRK), including anesthesia, scraping of the corneal epithelial cells, etc. Twenty of these animals then received PRK with energy delivered by excimer laser (pulse rate = 20 Hz, fluence 250 mJ/cm2; number of pulses =
COSTAGLIOLA, Ciro, DI GIOVANNI A, RINALDI M, SCIBELLI G, FIORETTI F.   +4 more
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Optics for photorefractive keratectomy

Journal of Cataract and Refractive Surgery, 1993
Matrix calculations are applied to Gaussian optics in the study of myopic correction by photorefractive keratectomy. The Colliac matrix formula determines the postoperative anterior curvature radius of the treated cornea. It also calculates the maximal depth of the removed corneal tissue and the ablation zone diameter needed to achieve emmetropia.
J P, Colliac, H J, Shammas
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Photorefractive Keratectomy

International Ophthalmology Clinics, 2000
In this chapter, we have reviewed important aspects of PRK. A thorough understanding of the preoperative assessments, techniques, and postoperative management is essential to achieve satisfactory visual outcomes. Laser safety checks are mandatory. A well-functioning excimer laser with good optics is required.
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Pharmacotherapy of photorefractive keratectomy

Journal of Cataract and Refractive Surgery, 1996
To compare the pharmacotherapeutic practices of high-volume photorefractive keratectomy (PRK) surgeons with suggested practices gleaned from the current literature.York Finch Eye Associates, Toronto, Canada.Seventy-five ophthalmic surgeons believed by the authors to do a high-volume of PRKs were surveyed over the summer of 1994 about their ...
S A, Arshinoff, M D, Mills, S, Haber
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Photorefractive keratectomy in children

Journal of Cataract and Refractive Surgery, 2002
To evaluate photorefractive keratectomy (PRK) in pediatric patients who fail traditional methods of treatment for myopic anisometropic amblyopia and high myopia.Nonhospital surgical facility with follow-up in a hospital clinic setting.Photorefractive keratectomy was performed in 40 eyes of 27 patients.
William F, Astle, Peter T, Huang, Anna L, Ells, Robin G, Cox, Micheline C, Deschenes, Heather M, Vibert   +5 more
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Satisfaction after Photorefractive Keratectomy

Journal of Refractive Surgery, 1998
ABSTRACT PURPOSE: To evaluate patient satisfaction one year after photorefractive keratectomy (PRK) for myopia and myopia astigmatism using the Nidek EC-5000 excimer laser. METHODS: This study assessed the level of satisfaction of 6280 patients who underwent PRK after a minimum follow-up of 1 year.
S, Shah, S, Perera, A, Chatterjee
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Thermal Consequences of Photorefractive Keratectomy

Cornea, 2001
Photorefractive keratectomy (PRK) is still a widely used method for the correction of refractive error despite the advent of laser in situ keratomileusis (LASIK). However, both procedures are associated with significant side effects such as corneal haze and regression.
Maldonado-Codina, Carole, Morgan, Philip, Efron, Nathan   +2 more
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Induced astigmatismafter photorefractive keratectomy

Journal of Cataract and Refractive Surgery, 1999
To retrospectively analyze a group of patients to determine whether their induced astigmatism was caused by asymmetry in the laser beam, asymmetry in ablation rates, or wound healing in different corneal meridians.Single-center physician office.In this study, 146 eyes of 116 patients who had photorefractive keratectomy (PRK) for myopia with the Apex ...
T, Onclinx, R J, Smith, R K, Maloney
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Simultaneous and Sequential Photorefractive Keratectomy

Journal of Refractive Surgery, 1995
ABSTRACT The purpose of this study was to show the safety, effectiveness, and predictability of simultaneous bilateral as compared to sequential unilateral photorefractive keratectomy in 273 normally sighted myopic eyes. An excimer laser with a fluence of 180 mj/cm p 2 at a frequency of 10 Hz was used at ...
H, Bahçecioğlu, A, Ozdamar, R, Aktunç, T, Aktunç, M, Karaçorlu, C, Erçikan   +5 more
openaire   +2 more sources