This retrospective study aimed to investigate the progression of central retinal vein occlusion (CVO) prior to treatment initiation and its impact on prognosis. Of the 54 studied eyes with acute CVO, the average logMAR visual acuity (VA) at the initial visit was 0.65 ± 0.49 with an average time to treatment of 14.9 ± 14.5 days. VA at the initial treatment was identified as a stronger predictor of VA at the final visit compared to VA at the first visit or other factors. Patients who received treatment more than 28 days after the initial visit experienced a significant decline in VA compared to those treated within 28 days (0.21 ± 0.35 vs. 0.04 ± 0.13, p = 0.006). Additionally, patients who were treated between 15 and 28 days showed a greater decrease in VA compared to those treated within 14 days (0.12 ± 0.46 vs. 0.018 ± 0.02, p = 0.026). These findings from the current retrospective analysis suggesting that there is a possibility of VA decline at the initial treatment associating with worse prognosis even when treatment is administered within a month should be further investigated in the prospective study. Also, it may be crucial to consider frequent monitoring of acute CVO patients for initiating treatment at the optimal timing.
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