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retinal vein occlusion incidence pattern risk factors Nigeria
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Pattern and Risk Factors for Retinal Vein Occlusion in Onitsha, Nigeria
Abstract
Objectives: To determine the pattern and risk factors for retinal vein occlusion at the Guinness Eye Center, Onitsha, Nigeria.
Materials and Methods: Case files of all patients with retinal vein occlusion between May 1997 and April 2004 were reviewed. Information on age, sex, visual acuity, ocular
complications and associated risk factors were abstracted into a standard proforma and analysed.
Results: 45 patients (48 eyes) were seen with a mean age of 58 years; range - 41-77 years. There were 16 (35.6%) male patients and 29(64.4%) female patients. Thirty-eight
(84.4%) patients (40 eyes) had central retinal vein occlusion (CRVO), 7 (15.6%) patients (8 eyes) had branch vein occlusion (BRVO), and 29 (60.4%) eyes (all CRVO)
had ischaemic vein occlusion. Twenty-eight (58.3%) eyes were blind, while 18 (37.5%) had visual impairment. Twenty-five (55.6%) patients had hypertension, 10 (22.2%) were diabetic and 10 (22.2%) had glaucoma.
Conclusions: Retinal vein occlusion is an important retinal vascular disease that causes visual loss. The incidence of the disease could be reduced if the associated risk factors were
detected and treated early. A prospective study was carried out to clearly identify the modifiable risk factors for the disease in our environment.
Keywords: retinal vein occlusion, incidence, pattern, risk factors, Nigeria
Nigerian Journal of Ophthalmology Vol. 16 (1) 2008: pp. 30-32
