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The case of a 35-year-old patient with acute alcoholic pancreatitis who developed sudden loss of visual acuity is described. The ophthalmoscopic examination revealed diffuse retinal whitening of the posterior pole with confluent cotton-wool spots. Fluorescein angiogram showed retinal arteriolar occlusion. The findings were compatible with Purtscher-like retinopathy. Computed tomography of the abdomen demonstrated enlarged liver and pancreas with edema and inflammation. The pathogenesis of this form of retinopathy still remains uncertain and there is no specific treatment available.

Infections due to Agrobacterium radiobacter are rare. This study reports 2 cases of A. radiobacter endophthalmitis. To the authors' knowledge, these are only the second and third reported cases of endophthalmitis caused by this Gram-negative rod.

Purpose To evaluate the learning effect of frequency doubling technology (FDT) perimetry using the Humphrey Matrix perimeter in healthy subjects with no perimetric experience. Methods One eye of 28 healthy adults who had no history of visual field testing underwent three Matrix tests using 24-2 programme with full-threshold strategy. The results of the first session were compared with those of the second, and the third sessions. Learning effect was defined as an improvement at results for duration, perimetric indices, and the number of points with a Po5 and o1% in the total and pattern deviation maps. Anderson's criteria were applied to define abnormal examinations. Results The mean in the mean deviation global index was À7.40 ± 1.49 dB in the first session, À4.64±0.97 dB in the second session, and À3.29±0.93 dB in the third session. Pattern standard deviations were decreased as the tests were repeated (Po0.01). Test duration, fixation losses, false negative, and the number of points with a Po5 and o1% in the total and pattern deviation maps rate were also changed significantly (Po0.05). Among the criteria suggested by Anderson, the Glaucoma Hemifield Test performed better in all session tests. The false-positive rates ranged from 50% (95% confidence intervals [CI] 30.6-69.4%) to 64% (95% CI 44.1-81.4%) for the first session, 29% (95% CI 13.2-48.7%) to 54% (95% CI 33.9-72.5%) for the second session, and from 18% (95% CI 6.1-36.9%) to 32% (95% CI 15.9-52.4%) for the third session. ConclusionsThe results of this study show that the learning effect for Humphrey Matrix FDT perimetry must be considered in normal individuals with no perimetric experience.

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When testing individuals with no perimetric experience, moderate sensitivities and specificities should be expected, regardless of the strategy chosen.

Keratoacanthoma generally occurs on the skin; it is rarely found in the conjunctiva. A case of a 34-year-old woman with a rapidly growing conjunctival mass is reported. The tumor was excised with a safety margin to exclude squamous cell carcinoma. Histopathologically it was crateriform and consistent with atypical keratoacanthoma. There has been no recurrence in 2 years of follow-up. Conjunctival keratoacanthoma is rare; differential diagnosis of conventional squamous cell carcinoma and keratoacanthoma can be difficult. We recommend complete surgical excision and careful follow-up of crateriform squamous proliferations.

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