PURPOSE To quantify long-term changes in stromal collagen ultrastructure following penetrating keratoplasty (PK), and evaluate their possible implications for corneal biomechanics. METHODS A pair of 16 mm post-mortem corneo-scleral buttons was obtained from a patient receiving bilateral penetrating keratoplasty 12 (left)/28 (right) years previously. Small-angle x-ray scattering quantified col...

purpose : to report a case with history of penetrating keratoplasty (pk) for keratoconus that developed acute hydrops in the recipient and donor cornea methods : a 46-year-old man, with history of bilateral keratoconus, who had undergone corneal transplantation in his left eye, presented with complaints of sudden visual reduction, photophobia, redness and pain of the left eye. results : review ...

purpose: to report a case of bilateral acanthamoeba keratitis with recurrence after keratoplasties case report: here we report a case with bilateral acanthamoeba keratitis who initially responds to medical treatment, after discontinuation of treatment the disease flared up and not responded to medical therapy so superficial keratectomy was done and medical treatment continued and the ulcer impr...

PURPOSE To compare the measurement of contrast sensitivity at a distance in patients submitted to penetrating keratoplasty versus patients submitted to deep anterior lamellar keratoplasty for keratoconus treatment. METHODS Contrast sensitivity of fourteen subjects submitted to penetrating keratoplasty and fourteen subjects submitted to deep anterior lamellar keratoplasty have been analyzed th...

purpose: to compare the refractive results of penetrating keratoplasty (pk) in two groups of patients with keratoconus undergoing corneal grafting with different amounts of donor-recipient disparity (0.25 and 0.5 mm). methods: as a randomized clinical trial and after performing a complete ocular examination and vitreous length measurement, 30 patients with keratoconus were randomly assigned in ...

PURPOSE To assess the clinical outcomes of femtosecond laser-assisted keratoplasty (FLAK) using the VisuMax femtosecond laser system, and to compare them with those of conventional penetrating keratoplasty (PK). METHODS We retrospectively examined 20 eyes of 20 consecutive patients undergoing FLAK and 20 eyes of 20 age- and diagnosis-matched patients undergoing conventional PK. We quantitativ...

Corneal opacities can obstruct ophthalmology examination in patients before penetrating keratoplasty (PK).To assess the usefulness of visual evoked potentials (VEPs) in estimating postoperative visual acuity (VA) in patients eligible for (PK) with opaque cornea in 1 eye and good VA in the fellow eye.In this observational study, the mean age of 52 males and 48 females was 57.17 ± 15.99 (21-87 ye...

purpose: to investigate the risk factors of wound dehiscence and lens extrusion following blunt trauma in patients with penetrating keratoplasty (pk) as well as the results of treatment. methods: in a retrospective case series, 7 eyes of 7 patients including 6 male and one female subjects were investigated. all cases received primary care at the time of referral and then underwent secondary rep...

this work is a report 0/9 cases ofarcuate incision for correction 0/astigmatism, after penetrating keratoplasty. plannings were based ojj corneal topography, and the first operation was always arcuate incision alone. 11,e secondary plans were based on refractive errors. the mean of preoperative astigmatism was 6d with the range of5 to 9/). after arcuate incision a/the graft-host interface in th...

PURPOSE To investigate the incidence of adverse reactions after corneal transplantation, reported to the Eye Bank Association of America. METHODS Incidence of adverse reactions from January 1, 2007, to December 31, 2014, was analyzed. RESULTS Of the 354,930 transplants performed in the United States, adverse reactions were reported in 494 cases (0.139%). Primary graft failure (PGF) predomin...