ISSN: 2459 - 1777 | E-ISSN 2587-0394
Volume : 7 Issue : 4 Year : 2022
Dynamic and Static Pupil Changes After Near Work: Comparison Between Reading a Book and Using a Smartphone [Beyoglu Eye J]
Beyoglu Eye J. 2022; 7(4): 253-260 | DOI: 10.14744/bej.2022.64325

Dynamic and Static Pupil Changes After Near Work: Comparison Between Reading a Book and Using a Smartphone

Ali Mirzajani1, Narges Akhgar1, Ebrahim Jafarzadehpour1, Jamileh Abolghasemi2, Alireza Jamali1, Zohreh Fakhimi3
1Rehabilitation Research Center, Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
2Department of Biostatistics, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
3Department of Optometry, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran

OBJECTIVES: Decreased static pupil size due to accommodation is a common clinical finding; however, changes in pupillary dynamic responses after near-work activities such as reading a book and using a smartphone are not well understood.
METHODS: The present study was performed on 76 right eyes of 76 volunteers (mean age: 20.95±2.34 years) who had ocular near activity more than 4 h per day. The participants were divided into two groups based on the dominant activity, reading a book (Group 1) or using a smartphone (Group 2). Evaluation of dynamic and static parameters of the pupil was performed before and after 1 h of continuous routine eye activity in both groups and compared.
RESULTS: Near work reduced pupil diameter (PD) in all static components (p<0.001) and the amount of change in the min PD (p=0.039) and mesopic PD (p=0.043) were different between two groups and were higher in Group 1 (both, p<0.05). Dynamic elements showed a decrease in initial diameter, amplitude and velocity of contraction and dilation, and an increase in other components so that the changes after using smartphone were significant in all dynamic parameters (all, p<0.05), but reading the book only made a significant difference in the initial diameter, amplitude, and velocity of contraction and duration of dilation (all, p<0.05); the changes were only different in the initial diameter between the two studied groups, which was higher in Group 1 (p=0.047).
DISCUSSION AND CONCLUSION: The present study showed that reading a book and using smartphone cause changes in the pupil compo-nents, which were decreasing in diameter components and velocity of changes and increasing in latency of changes; the type of ocular work may affect the changes.

Keywords: Static Pupillometry, Dynamic Pupillometry, Near Work, Metrovision Monopack 1.

Ali Mirzajani, Narges Akhgar, Ebrahim Jafarzadehpour, Jamileh Abolghasemi, Alireza Jamali, Zohreh Fakhimi. Dynamic and Static Pupil Changes After Near Work: Comparison Between Reading a Book and Using a Smartphone. Beyoglu Eye J. 2022; 7(4): 253-260

Corresponding Author: Alireza Jamali, Iran
Manuscript Language: English
LookUs & Online Makale