Functional Visual Acuity of Early Presbyopia

Yusaku Katada, Kazuno Negishi, Kazuhiro Watanabe, Yuta Shigeno, Megumi Saiki, Hidemasa Torii, Minako Kaido and Kazuo Tsubota

PLOS ONE, 2016, vol. 11, issue 3, 1-9

Abstract: Purpose: To evaluate visual function in patients with early presbyopia using the functional visual acuity (FVA) test. Methods: This study included 27 eyes of 27 healthy older volunteers (mean age, 44.1 ± 2.6 years) and 14 eyes of 14 healthy young volunteers (mean age, 28.4±4.8 years). The distance-corrected visual acuity (DCVA), distance-corrected near VA (DCNVA), subjective amplitude of accommodation (AA), and distance and near pupillary diameters were measured. The distance FVA and distance-corrected near FVA (DCNFVA) were measured using the FVA Measurement System. The standard Schirmer test and standard tear break-up time measurement also were performed. Results: The logarithm of the minimum angle of resolution (logMAR) DCVA was better than 0 in all subjects. The percentages of subjects with logMAR DCNVA below 0 was significantly lower in the presbyopia group than in the young group. The DCNFVA in the presbyopia group was significantly (P

Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0151094

DOI: 10.1371/journal.pone.0151094

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