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At least 1,297 records · Page 72Linked to original sources
PubMed1998

Screening of myopic photorefractive keratectomy in eye bank eyes by computerized videokeratography.

BACKGROUND: In contrast to incisional keratotomy, corneas that have undergone photorefractive keratectomy may be difficult to detect by inspection with slitlamp biomicroscopy alone. Eye bank corneas that have undergone high myopic refractive surgical correction could potentially result in substantial postoperative hyperopic correction if used as donor tissue for corneal transplantation. Surface irregularities or displacement of the treated optical zone within the graft in relation to the entrance pupil of the recipient could result in significant induced astigmatism and distortion. This study examines computerized videokeratographic screening of eye bank globes as a strategy for detecting myopic photorefractive keratectomy. METHODS: Preoperative and postoperative corneal topographic maps of freshly enucleated human and rabbit eyes that have undergone myopic photorefractive keratectomy with an excimer laser were placed in a globe-fixating device and analyzed using a vertically oriented videokeratoscope. The same system was applied in an actual eye bank setting, and potentially transplantable globes from donors without a history of corneal surgery were analyzed. RESULTS: Computerized videokeratography using a vertically mounted system reliably detected photorefractive keratectomy in 12 of 12 human eye bank corneas treated by excimer photorefractive keratectomy in a range between -1.5 to -6.0 diopters. This method also detected similar changes on lased rabbit corneas enucleated 6 weeks after excimer surgery. Data processed with the tangential mode yielded a "bull's-eye" topography pattern reflecting central corneal flattening that was more sensitive in detecting myopic corrections than the conventional axial formula-based color maps. False-positive results were not detected in 96 cadaver globes sequentially screened in the eye bank. CONCLUSIONS: Computerized videokeratography represents a feasible method to screen donor globes for myopic photorefractive keratectomy as shown by the in vitro and rabbit models. However, only whole globes and not corneoscleral sections are amenable to processing with this technique. Tangential maps provided greater sensitivity in detecting low myopic corrections than the axial formula-based color maps.

Animals↗
PubMed2000

Traumatic Acremonium atrogriseum keratitis following laser-assisted in situ keratomileusis.

A 52-year-old man underwent bilateral laser-assisted in situ keratomileusis. Eight months later, he sustained a penetrating corneal injury to the left eye. A dense white infiltrate, unresponsive to antimicrobial therapy, developed in the corneal stroma. Corneal biopsy and eventual penetrating keratoplasty were performed, and both specimens demonstrated fungal elements with branching, septate hyphae. Culture identified the organism as Acremonium atrogriseum. Histopathologic features of this organism and its differentiation from other, more common fungal organisms are discussed herein.

Acremonium↗
PubMed1975

Nanophthalmos with uveal effusion. A new clinical entity.

Five patients exhibited the association of nanophthalmos and uveal effusion, apparently on a familial basis. Glaucoma, occurring in the fourth to sixth decades of life, required surgical intervention that was followed by the development of secondary retinal and choroidal detachment. Recognition of this syndrome is important because: (1) surgical procedures for glaucoma should be avoided, if possible, in order to prevent the development of uveal effusion; (2) retinal detachment surgical procedures are ineffective in uveal effusion and should be avoided, and (3) choroidal elevation occurring in the uveal effusion phase may be erroneously diagnosed as an intraocular tumor and unnecessary enucleation may follow.

Adult↗