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| Infuenceof ImageDefocus Propertites Simulated by Adjusting RGB Pixels at the Maltase Cross Edge on Accommodative Response and Pupil Diameter in Human Eye |
| Lu Ma, Qiong Xu, Yan Li, Kai Wang, Mingwei Zhao |
| Organization Instituteof MedicalTechnology,Peking University HealthScienceCenter,Departmentof Ophthalmology&Clinical Centre of Optometry, Peking University People's Hospital, Eye Diseases and Optometry Institute, Beijing Key Laboratory of Diagnosis andTherapy of Retinal and Choroid Diseases,College of Optometry, Peking University Health Science Center, Beijing 100044, China |
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Abstract Objective: To explore the infuence of image defocus simulated by adjusting the RGB pixels at the Maltase Cross edge on accommodative response and pupil size in the human eye. Methods: In this cross-sectional study, a total of 23 healthy young students (10 males and 13 females) studying at Peking University Health Science Center were included, with the mean age 21.5±1.3 yearsand mean spherical equivalent refractive -2.53±1.13 D. Fourteen Maltase Crosses with the edge RGB pixels adjusted were presented randomly at the center of an LCD screen. Each participant completed 14 visual tasks, with 3 minutes for each task. During the visual task, the accommodative response and pupil size were continuously measured by a binocular open-feld autorefractometer. The accommodative error was determined by subtracting the real accommodative response from the accommodative demand, and the root mean square (RMS) value of the real accommodative response was calculated to determine microfluctuations. Repeated-measures ANOVA and post hoc pairwise comparisons using bonferroni correction were performed to assess the effect of polarity, defocustype, and edge RGB pixel type on accommodative error, microfuctuation, and pupil diameter. Results:The effect of different edge RGB pixel on accommodative error had no signifcant difference. The RMS value of positive polarity and negative polarity were 0.22±0.08 D and 0.27±0.11 D, respectively. And the difference was 0.05 D (95% confdence interval,0.03-0.06 D), showed statistically signifcant (P<0.001). Polarity, simulated defocus type, and edge RGB type had a signifcant effect on pupil diameter (polarity: F=19.41, P<0.001; defocus type: F=6.42, P=0.019; edge RGB type: F=8.89, P=0.005). The interaction between polarity and simulated defocus type signifcantly affected pupil diameter (F=8.59, P=0.008). Conclusions:The human eye was sensitive to polarities and simulated defocus types of visual targets. The RMS value and pupil diameter were smaller when the human eye was exposed to positive polarities compared with being exposed to negative polarites. Adjusting RGB pixels at the Maltase Cross edge affects the pupil diameter signifcantly.
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Received: 03 August 2022
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| Fund: Capital's Funds for Health Improvement and Research (2022-1G-4083); National Natural Science Foundation of China (82171092); National Key R&D Program of China (2021YFC2702100,2020YFC2008200) |
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Corresponding Authors:
Kai Wang, Organization Institute of Medical Technology, Peking University Health Science Center, Department of Ophthalmology&Clinical Centre of Optometry, Peking University People's Hospital, Eye Diseases and Optometry Institute, Beijing Key Laboratory of Diagnosis and Therapy of RetinalandChoroidDiseases, CollegeofOptometry,Peking UniversityHealth ScienceCenter, Beijing 100044, China (Email: wang_kai@bjmu.edu.cn)
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. [J]. Chinese Journal of Optometry Ophthalmology and Visual science, 2023, 25(8): 0-. |
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