The effect of overminus prescription on positive fusional vergence value and accommodation amplitude after watching video at 6 metre
Introduction: The study aimed to investigate the effect -1.00 DS overminus prescription on positive fusional vergence (PFV) and accommodation amplitude (AA) after watching video at 6m. Method: Thirty normal participants without binocular vision anomalies (23.50 ± 1.50 years) were involved in this...
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| Format: | Article |
| Language: | English |
| Published: |
Kulliyyah of Allied Health Sciences, International Islamic University Malaysia
2020
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| Online Access: | http://irep.iium.edu.my/82393/ http://irep.iium.edu.my/82393/1/82393_The%20effect%20of%20overminus%20prescription.pdf |
| Summary: | Introduction: The study aimed to investigate the effect -1.00 DS overminus prescription on positive
fusional vergence (PFV) and accommodation amplitude (AA) after watching video at 6m. Method:
Thirty normal participants without binocular vision anomalies (23.50 ± 1.50 years) were involved in
this quasi-experimental study. All subjects wore additional -1.00 DS on the spectacle prescription for
15 minutes while watching video at 6m. The distance (6m) and near (40cm) PFV and AA were
measured before and after 15 minutes watching video at 6m with the overminus prescription.
Results: The result demonstrated the right eye (RE) AA reduced significantly (p<0.05) while the
reduction on the left side was insignificant (p> 0.05). The changes of near and distance PFV was
found insignificant (p> 0.05) after 15 minutes watching video at 6m with overminus prescription.
Conclusion: Overminus prescription of -1.00DS for 15 minutes at distance fixation that presented in
this study reduced the ability of accommodation. There were no changes in vergence system after
intervention of -1.00 DS overminus prescription for 15 minutes at 6m. |
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