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[Effect of simplified and traditional Chinese character on accommodative microfluctuation in young adult myopes and emmetropes].

Objective: This study investigates the effect of simplified and traditional Chinese character on accommodative microfluctuation in young adult myopes and emmetropes. Methods: Prospective cohort study. Based on refractive errors, Young adult candidates (18-28 years) were classified into two groups based on their spherical equivalent degrees: emmetropes (n=18), myopes (n=18). Four different reading targets (12pt size simplified and traditional Chinese characters, and 8pt size simplified and traditional Chinese characters) were displayed on computer screen collectively for 135s. The accommodative microfluctuation of the candidates were measured using the free space Grand-Seiko WAM-5500 autorefractor. Results: The results indicated that the type of character (simplified and traditional) had significant influence on accommodative microfluctuation. For myopic candidates, the accommodative microfluctuation for traditional Chinese character was greater than that for simplified Chinese character [traditional Chinese character: (0.35±0.17) D, vs. simplified Chinese character: (0.29±0.11) D, t=2.556, P=0.017], however as for emmetropic candidates, the difference between the accommodative microflucuation for the two types of characters was of no statistical significance [traditional Chinese character: (0.24±0.11) D, vs. simplified Chinese character: (0.24±0.12) D, t=0.004, P=0.996]. There was a difference between emmetropic and myopic candidates in terms of accommodative microfluctuation for traditional Chinese character, myopes had greater accommodative microfluctuation than emmetropes (t=3.140, P=0.02). However the difference between emmetropic and myopic candidates in terms of accommodative microfluctuation for simplified Chinese character was of no statistical significance (t=1.866, P=0.066). Conclusions: The results of the study indicated that myopes were more susceptible than emmetropic in accommodative microfluctuation when reading traditional Chinese character of high spatial frequency. (Chin J Ophthalmol, 2018, 54: 288-293).