Abstract:
PURPOSE:To evaluate the static measurement of the accommodative stimulus-response curve with emoji symbols. METHODS:The accommodative stimulus-response curve was measured in 18 subjects using a Hartmann-Shack sensor to obtain the objective accommodative response from the Zernike defocus term. Measurements were acquired at different accommodative demands, from 0 to 3 D with a step of 0.5 D. Detailed and nondetailed emoji targets were used with two different sizes, corresponding to the two most common visual angles used in smartphones. RESULTS:A regression analysis was performed to fit the mean results obtained for each target. The determination coefficient was R2 ≥ 0.988 for all targets. For the detailed targets, the slopes for the averaged stimulus-response curve were 0.65 and 0.66 for the bigger and smaller sizes, respectively. For the nondetailed targets, the slopes were 0.60 and 0.58 for the bigger and smaller sizes, respectively. p values for these slopes were statistically significant for the two types of targets (p < 0.01). CONCLUSIONS:Our results reveal that the replacement of a word or several words by detailed or nondetailed emoji symbols seems not to provoke a different accommodative response in normal subjects and under standard viewing conditions in the use of smartphones.
journal_name
J Ophthalmoljournal_title
Journal of ophthalmologyauthors
Montés-Micó R,Esteve Taboada JJ,Bernal-Molina P,Ferrer-Blasco Tdoi
10.1155/2017/4165706subject
Has Abstractpub_date
2017-01-01 00:00:00pages
4165706eissn
2090-004Xissn
2090-0058journal_volume
2017pub_type
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