JOURNAL ARTICLE
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[Analysis of visual prognosis and correlative factors in retinal vein occlusion].

OBJECTIVE: To investigate the visual prognosis, risk factors, complications and the causes of visual deterioration in patients with various types of retinal vein occlusion (RVO).

METHODS: Nine hundred and forty-four eyes of 913 patients with various types of RVO were analyzed. The age range of patients was 15 - 89 years (average 52.8 +/- 11.9), and the average follow-up was 20.7 months. The data of the patients were studied by SPSS software.

RESULTS: (1) RVO was classified into central RVO (CRVO) in 406 eyes of 391 cases (43.0%), hemi-RVO (HRVO) in 60 eyes of 60 cases (6.4%) and branch RVO (BRVO) in 478 eyes of 462 cases (50.6%). (2) They were subdivided into ischemic type in 633 eyes (67.1%) and non-ischemic type in 311 eyes (32.9%). (3) The visual prognosis: the average initial visual acuity (VA) in CRVO, HRVO and BRVO was 0.36, 0.38 and 0.40 respectively. The average final VA was 0.40 in CRVO (P > 0.05), 0.50 in HRVO (P > 0.05) and 0.58 in BRVO (P < 0.05). (4) The initial VA and prognosis: there was close relationship between initial VA and visual prognosis. If the initial VA >/= 0.5, the final acuity maintained >/= 0.5 in 70.6% in CRVO, 75.0% in HRVO and 84.9% in BRVO. The patients with initial VA
CONCLUSION: The rate of blindness of RVO is high, and the visual prognosis of ischemic type is worse. There is close relationship between the level of initial VA and visual prognosis. CME, RNV and NVG are important causes of blindness.

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