Journal ArticleDOI
The Effects of Ablation Diameter on the Outcome of Excimer Laser Photorefractive Keratectomy: A Prospective, Randomized, Double-Blind Study
TLDR
Treatment with 6.00-mm ablation diameters precipitated less initial overcorrection, greatly improved the predictability of photorefractive keratectomy, and was associated with a reduction in complications impairing postoperative visual performance.Abstract:
Objective: To determine the effects of the ablation diameter on the outcome of excimer laser photorefractive keratectomy. Design: Eighty patients were randomized to either a 5.00-mm or a 6.00-mm treatment group and within these groups underwent either a −3.00-diopter (D) ora −6.00-D correction based on their preoperative refraction. A Summit Omnimed excimer laser was used throughout the study. Results: In eyes treated with a 6.00-mm-diameter ablation, the initial hyperopic shift was reduced, with significant differences at 1 week with −3.00-D corrections and at 1 and 4 weeks with −6.00-D corrections (P Conclusions: Treatment with 6.00-mm ablation diameters precipitated less initial overcorrection, greatly improved the predictability of photorefractive keratectomy, and was associated with a reduction in complications impairing postoperative visual performance.read more
Citations
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Journal ArticleDOI
Corneal reshaping and myopia progression
TL;DR: Results confirm previous reports of slowed eye growth following corneal reshaping contact lens wear, and also confirm that corneals can slow myopia progression in children.
Journal ArticleDOI
Night Vision Disturbances After Corneal Refractive Surgery
TL;DR: There are no gold-standard clinical tests available to measure glare disability, contrast sensitivity, or image degradations after refractive surgery, so standardization is essential for objective measurement and follow-up to further understand the effects of these surgeries on the optical system and thus, hopefully, allow for modification of techniques to decrease or eliminate post-refractive vision disturbances.
Journal ArticleDOI
Regression and its mechanisms after laser in situ keratomileusis in moderate and high myopia
Arturo Chayet,Kerry K. Assil,Miguel Montes,Marcela Espinosa-Lagana,Alberto Castellanos,Georgios Tsioulias +5 more
TL;DR: Early regression of refractive effect after LASIK appears to be a consequence of an increase in Corneal thickness associated with central corneal steepening, and longer follow-up is required to confirm these trends.
Journal ArticleDOI
Corneal optical aberrations induced by photorefractive keratectomy.
Katherine M. Oliver,Richard P. Hemenger,Melanie C. Corbett,David P.S. O'Brart,Seema Verma,John Marshall,Alan Tomlinson +6 more
TL;DR: Corneal modulation transfer function calculations suggest that a significant loss of visual performance should be anticipated following photorefractive keratectomy, the effect being greatest for large pupil diameters.
Journal ArticleDOI
Visual performance after photorefractive keratectomy. A prospective study.
TL;DR: Low-contrast visual acuity losses after PRK are notably greater than high-cont Contrast Visual Acuity losses for best-corrected vision, providing evidence of an association between corneal topography and the functional outcome of PRK.
References
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Journal ArticleDOI
Photorefractive keratectomy: A technique for laser refractive surgery
TL;DR: Conditions for one such procedure, photorefractive keratectomy, the direct reshaping of the cornea's central optical zone using tissue ablation with far ultraviolet radiation is described and a method of achieving better beam uniformity using beam integration by rotation is demonstrated.
Journal ArticleDOI
Myopic photorefractive keratectomy with the excimer laser. One-year follow-up.
Theo Seiler,J. Wollensak +1 more
TL;DR: A 1-year follow-up study on a consecutive series of 26 sighted eyes undergoing PRK found that visual acuity with glare decreased from 20/27 preoperatively to 20/31 after 1 year, and risk factors for scarring include noncompliance with postoperative steroid medication, high myopic corrections, and high steroid responders.
Journal ArticleDOI
Long-term Healing of the Central Cornea after Photorefractive Keratectomy Using an Excimer Laser
TL;DR: Using an excimer laser at 193 nm, 3-mm diameter discs were ablated from the optical zone of monkey corneas at a variety of depths up to 130 micron and showed a normal morphology in this layer with the exception that basal cells were slightly more elevated particularly at the disc margins where the epithelium contained more cell layers.
Journal ArticleDOI
Photorefractive keratectomy with an argon fluoride excimer laser: a clinical study.
TL;DR: To date PRK appears to be a safe procedure that holds considerable promise for refractive surgery in the future, and considerable individual variation in response to this surgery, which is more marked in high myopia.
Journal ArticleDOI
The effect of topical corticosteroids on refractive outcome and corneal haze after photorefractive keratectomy. A prospective, randomized, double-blind trial.
TL;DR: It is concluded that long-term use of corticosteroids to maintain the initial beneficial effect on refraction would be unacceptable, and these agents should not be used after photorefractive keratectomy.