Cornea
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The purposes of this study were to report the indications, graft survival, risk factors for graft failure, and visual outcomes for third or greater penetrating keratoplasties (PKP). ⋯ Over 50% of third and fourth grafts were clear at 5 years postoperatively. Outcomes of third grafts were better in patients with Fuchs dystrophy, keratoconus, and herpetic keratitis. Absence of previous glaucoma surgery and/or corneal neovascularization is associated with better outcomes of multiple PKPs.
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To evaluate the visual and refractive outcomes after deep anterior lamellar keratoplasty (DALK) using the big-bubble technique in eyes with keratoconus. ⋯ : DALK using the big-bubble technique appears to be a safe and effective procedure for eyes with moderate to advanced keratoconus. In case of extensive intraoperative DM perforation, it does not pose any limitation to ongoing penetrating keratoplasty.
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The purpose of this study was to investigate risk factors for and results of treatments in patients with traumatic wound dehiscence and lens extrusion after penetrating keratoplasty. ⋯ Patients who undergo penetrating keratoplasty are susceptible to graft wound dehiscence resulting from trauma, especially during the first year after keratoplasty. This type of dehiscence is more prevalent in young people, who engage in more social activities and are more exposed to trauma that may lead to blindness. Patient education about the effects of trauma, use of protective eye shields by patients, and performance of lamellar keratoplasty instead of penetrating keratoplasty can decrease trauma and its effects in these patients.
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To report the outcome of penetrating keratoplasty with small-diameter and glycerin-cryopreserved grafts for eccentric corneal perforation. ⋯ Small-diameter penetrating keratoplasty seems to be effective in treating various eccentric corneal perforations. Glycerin-cryopreserved donors may be a suitable alternative to fresh material for this technique, which solves the problem of shortage in supplying corneas and can be used in an emergency.