Causes and risk factors for graft failure in surgeries performed by physicians in fellowship training.

Purpose: To determine the incidence, causes, and risk factors of penetrating keratoplasty failure.

Methods: A retrospective study was carried out in 213 penetrating keratoplasties (194 patients) between January 1995 and January 2001 at the Cornea Section of the Ophthalmology Service at the School of Medicine, Federal University of Uberlândia MG, Brazil. Follow-up time for 213 surgeries ranged from 2 to 68 months (mean 29.

Ocular lesions arising after stings by hymenopteran insects.

Purpose: To describe the ocular lesions that occur after stings from hymenopteran insects.

Methods: We examined the ocular alterations in five patients who suffered ocular trauma from hymenopteran insect stings.

Results: In 4 cases where the insect was identified as a wasp, all the patients presented with persistent corneal decompensation and two presented with total cataract, requiring surgical treatment.

A study of glaucoma after penetrating keratoplasty.

Purpose: To identify the incidence and risk factors associated with the development of glaucoma after penetrating keratoplasty.

Methods: A retrospective study was carried out in 228 patients who underwent penetrating keratoplasty from January 1995 to January 2000 at the Cornea Section of the Ophthalmology Service at the School of Medicine, Federal University of Uberlândia MG, Brazil. Follow-up time ranged from 4 to 60 months (mean, 17.