AIM To determine the efficacy and safety of keratorefractive surgery in patients with accommodative and non-accommodative strabismus in a prospective study. METHODS Preoperative assessment included uncorrected (UCVA) and best-corrected visual acuity (BCVA), manifest and cycloplegic refraction and orthoptic examination. Laser in situ keratomileusis, laser epithelial keratomileusis and Artisan ...

Nowadays is well stated that after keratorefractive surgery, without a special correction, the intraocular lens (IOL) power is usually inaccurate. The article by Kenneth J. Hoffer1 which appeared in the first JanuaryMarch 2010 issue of the Journal of Emmetropia is an excellent review of recently published studies that analyze and try to solve the problems to calculate IOL power in eyes with pri...

OBJECTIVE To determine the long-term changes in the corneal endothelium after laser in situ keratomileusis (LASIK) and photorefractive keratectomy (PRK). METHODS Twenty-nine eyes (16 patients) received myopic LASIK or PRK, with intended correction to emmetropia. Central endothelial photographs were taken before and 9 years after surgery and were analyzed by the same masked investigator after ...

PURPOSE To calculate actual corneal astigmatism using the total corneal refractive astigmatism for the 4-mm apex zone of the Pentacam (TCRP4astig) and keratometric astigmatism (Kastig) before and after photorefractive keratectomy or laser in situ keratomileusis. METHODS Uncomplicated 56 eyes after more than 6 months from the surgery were recruited by chart review. Various corneal astigmatisms...

In the swamp lands of Louisiana the dead are buried in tombs above ground rather than interred in the waterlogged earth. Observation of this reversal of the usual arrangements prompted TP Werblin to conceive the procedure of epikeratoyhakia in 1979.' In this keratorefractive technique, instead of attempting direct invasive modification of the corneal contour, a preshaped refractive lamella is s...

PURPOSE We report a case of a patient with a history of glomerulonephropathy, not disclosed prior to laser in situ keratomileusis (LASIK), who developed severe postoperative peripheral ulcerative keratitis (PUK) soon after surgery. METHOD Case report. RESULTS Within a week of surgery, the patient, who had no blepharitis or ocular surface disease, also developed diffuse lamellar keratitis (D...

Bowman’s layer is composed of 22nm heterotypical type I collagen fibrils, which are randomly orientated (mean direction 45o to the corneal surface). Immediately beneath Bowman’s membrane, the cornea is arranged such that there are about 300 lamellae centrally and 500 lamellae peripherally. Each is composed of uniformly paralleldirected, 25nm heterotypical type I collagen fibrils with flattened ...

purpose : to assess and to compare stromal and endothelial changes at the cellular level in patients who had photorefractive keratectomy (prk) and laser in situ keratomileusis (lasik) using in vivo confocal microscopy methods : in this semiexperimental study, 32 eyes of 16 patients (4 males and 12 females) with low to moderate myopia [-1.00 to -4.50 diopters (d)] or low to moderate myopic astig...

Corneal refractive surgery procedures are widely performed to permanently correct refractive errors. Overall, refractive surgeries are safe, predictable and present high rates of satisfaction. Nevertheless, the induced epithelial, stromal and nerve damage alters corneal integrity and function, triggering a regenerative response. Complications that arise from corneal wound healing process might ...