{'fraction_non_alphanumeric': 0.016331658291457288, 'fraction_numerical': 0.008793969849246231, 'mean_word_length': 5.275590551181103, '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}}
VERTICAL YOKED PRISM—PATIENT ACCEPTANCE AND POSTURAL ADJUSTMENT

Abstract— Vertical yoked prism is sometimes incorporated into multifocal lenses to obtain a thinner lens, or prescribed for oculomotor deficiencies, or occurs if the vertical placement of spectacle lenses before the eyes is inappropriate. Patient acceptance of and postural and perceptual adaptation to such prism were studied. Twenty‐three subjects wore spectacles with no vertical prism and also with bilateral vertical yoked prism. The subject population could not significantly differentiate between 2Δ base down and 0Δ. There was a nearly unanimous rejection of 4 base down. Postural changes were significant during 4Δ wear but not during 2Δ wear. The results suggest that 2Δ may be accepted by most patients, but 4Δ will not.