{'fraction_non_alphanumeric': 0.02653631284916201, 'fraction_numerical': 0.00558659217877095, 'mean_word_length': 5.45945945945946, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Grid Pattern Photocoagulation for Macular Edema in Central Vein Occlusion

The Central Vein Occlusion Study (CVOS) was a randomized, controlled, clinical trial to determine whether treatment with macular grid photocoagulation improved or preserved visual acuity in eyes with macular edema involving the fovea secondary to nonischemic central retinal vein occlusion (CRVO) and best corrected visual acuity of 20/50 or worse. The study found that, overall, visual acuity results were not different for treated and control eyes. Based on this, the standard of care at that time continued to be observation. (Treatment with intravitreal anti–vascular endothelial growth factor [VEGF] agents is now the standard of care.)