The effect of 6 prism base-out during smartphone use on vergence and accommodation systems
Introduction: Prism is used in binocular vision assessment and visual therapy. The short-term use of prism, particularly base-out prism on vergence and accommodation system, was not well-explained in the previous investigations. Aim: This current study aimed to assess the effect of 6 prism base-ou...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Kulliyyah of Allied Health Sciences, International Islamic University Malaysia
2020
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/82386/1/82386_The%20Effect%20of%206%20Prism%20Base-Out%20During%20Smartphone.pdf http://irep.iium.edu.my/82386/ https://journals.iium.edu.my/ijahs/index.php/IJAHS/article/view/415/337 |
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| Summary: | Introduction: Prism is used in binocular vision assessment and visual therapy. The short-term use of
prism, particularly base-out prism on vergence and accommodation system, was not well-explained in
the previous investigations. Aim: This current study aimed to assess the effect of 6 prism base-out for 15
minutes on vergence and accommodation system during the utilization of smartphone. Methodology:
Thirty normal participants were recruited in this quasi-experimental study. All participants wore 6
prism-base out for 15 minutes while using smartphone at 40cm. Near positive fusional vergence (PFV)
and amplitude of accommodation (AA) were measured before and after 15 minutes of 6 prism base-out
wear during smartphone usage. Results: The results showed no significant difference for both parameters
measured when comparison was made between before and after prism base-out inducement in front of
eye. Conclusion: The vergence and accommodation systems presented in this study were almost
identical among normal subjects after inducement of 6 prism base-out for 15 minutes during watching
smartphone. |
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