{'fraction_non_alphanumeric': 0.025925925925925925, 'fraction_numerical': 0.005555555555555556, 'mean_word_length': 5.364705882352941, '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}}
Acute severe vision decrease immediately after photodynamic therapy.

Ocular photodynamic therapy (PDT) with verteporfin has been shown to be an effective treatment for occult subfoveal choroidal new vessels (CNV) in age-related macular degeneration, but is associated with acute severe vision decrease (ASVD) in 4.4% in patients who received the treatment. In this case the patient complained of decreased vision within hours of treatment, affording the opportunity to examine and assess the mechanism of vision loss 4 hours after therapy.