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Title	Frequency of prepapillary vascular loops in Congolese patients
Abstract Nr.	1052

Purpose	To determine the frequency of prepapillary vascular loops in the population of Congolese patients.
Methods	We performed a retrospective cross-sectional and descriptive analysis of the data collected between January 2005 and August 2014 from patients diagnosed with prepapillary vascular loops, in an outpatient eye clinic, a general ophthalmology practice.
Results	Out of 16016 patients seen during the study period, 24 patients (27 eyes) were diagnosed with prepapillary vascular loops, giving a frequency of 0.15%. The mean age of the patients with prepapillary vascular loops was 37.8 years±14 (SD)(range, 0.02 to 101 years).Fifteen (62.5%) of the patients with prepapillary vascular loops were male and 9 (37.5%)were female. Male were more frequently diagnosed with prepapillary vascular loops than female. Unilateral prepapillary vascular loops were found in 77.8% and bilateral in 22.2% of eyes. Emmetropia was found in 11 eyes (40.7%) and ametropia in 16 eyes (59.3%). Ametropia included simple myopia (4 eyes, 14.8%), myopic astigmatism (8 eyes, 29.6%), hyperopic astigmatism (one eye, 3.7%), hyperopia (3 eyes, 11.1%); one eye (3.7%) with high hyperopia showed anisometropia. Open angle glaucoma was found in 5 (18.5%) eyes; vascular tortuosity was seen in two eyes (7.4%). No complication such as retinal occlusion, vitreous hemorrhage, or any other complication was found.
Conclusion	The frequency of 0.15% found in this study confirms that prepapillary vascular loops are rare, uncommon congenital vascular malformations. Ametropia seems to be associated with this condition.

Authors 1

Last name	KAIMBO WA KAIMBO
Initials	D
Department	University of Kinshasa
City	Kinshasa