The Effect of Weighted Contact Lens on Physiological Nystagmus in Young Healthy Subjects
Background and Aim: Contact lenses correct the visual functioning of patients with low vision due to congenital nystagmus. This research presents a new method to reduce nystagmus using contact lenses in healthy subjects. Methods: Thirty-three normal people (13 women, 20 men) aged 18 to 25 with an...
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| Format: | Article |
| Language: | English |
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Tehran University of Medical Sciences
2023-06-01
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| Series: | Auditory and Vestibular Research |
| Subjects: | |
| Online Access: | https://avr.tums.ac.ir/index.php/avr/article/view/1144 |
| _version_ | 1797674901131231232 |
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| author | Majid Ashrafi Shahrokh Ramin Alireza Akbarzadeh Baghban |
| author_facet | Majid Ashrafi Shahrokh Ramin Alireza Akbarzadeh Baghban |
| author_sort | Majid Ashrafi |
| collection | DOAJ |
| description |
Background and Aim: Contact lenses correct the visual functioning of patients with low vision due to congenital nystagmus. This research presents a new method to reduce nystagmus using contact lenses in healthy subjects.
Methods: Thirty-three normal people (13 women, 20 men) aged 18 to 25 with an average age of 23.3 years participated in this study. In the studied subjects, nystagmus was evoked by an optokinetic stimulus. Then, it was measured and recorded. Next, the Conventional Contact Lens (CCL) and a special lens that was designed and made heavier than the conventional lenses were placed in the eyes of the participants. Once again, nystagmus was recorded with the optokinetic stimulus while the contact lens was placed in the participant’s eyes.
Results: No significant difference was observed for the Slow Phase Velocity (SPV) and gain of nystagmus with and without CCL (p>0.05), but this parameter had a significant difference with and without Weighted Contact Lenses (WCL) (p<0.05). Also, the comparison between the two lenses demonstrated a significant difference (p<0.05), which indicates the positive effect of the WCL in reducing the SPV and gain of nystagmus.
Conclusion: Using weighted contact lenses can significantly reduce the SPV and gain of optokinetic nystagmus in healthy subjects. Investigating the effect of this lens in inhibiting pathological nystagmus is recommended in future research.
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| first_indexed | 2024-03-11T22:05:52Z |
| format | Article |
| id | doaj.art-6513a7071dc9457091a6d8ff19096e14 |
| institution | Directory Open Access Journal |
| issn | 2423-480X |
| language | English |
| last_indexed | 2024-03-11T22:05:52Z |
| publishDate | 2023-06-01 |
| publisher | Tehran University of Medical Sciences |
| record_format | Article |
| series | Auditory and Vestibular Research |
| spelling | doaj.art-6513a7071dc9457091a6d8ff19096e142023-09-25T05:49:47ZengTehran University of Medical SciencesAuditory and Vestibular Research2423-480X2023-06-0132410.18502/avr.v32i4.13593The Effect of Weighted Contact Lens on Physiological Nystagmus in Young Healthy SubjectsMajid Ashrafi0Shahrokh Ramin1Alireza Akbarzadeh Baghban2Department of Audiology, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, IranDepartment of Optometry, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, IranProteomics Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran AND Department of Biostatistics, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran Background and Aim: Contact lenses correct the visual functioning of patients with low vision due to congenital nystagmus. This research presents a new method to reduce nystagmus using contact lenses in healthy subjects. Methods: Thirty-three normal people (13 women, 20 men) aged 18 to 25 with an average age of 23.3 years participated in this study. In the studied subjects, nystagmus was evoked by an optokinetic stimulus. Then, it was measured and recorded. Next, the Conventional Contact Lens (CCL) and a special lens that was designed and made heavier than the conventional lenses were placed in the eyes of the participants. Once again, nystagmus was recorded with the optokinetic stimulus while the contact lens was placed in the participant’s eyes. Results: No significant difference was observed for the Slow Phase Velocity (SPV) and gain of nystagmus with and without CCL (p>0.05), but this parameter had a significant difference with and without Weighted Contact Lenses (WCL) (p<0.05). Also, the comparison between the two lenses demonstrated a significant difference (p<0.05), which indicates the positive effect of the WCL in reducing the SPV and gain of nystagmus. Conclusion: Using weighted contact lenses can significantly reduce the SPV and gain of optokinetic nystagmus in healthy subjects. Investigating the effect of this lens in inhibiting pathological nystagmus is recommended in future research. https://avr.tums.ac.ir/index.php/avr/article/view/1144Nystagmusoptokinetic nystagmusweighted contact lens |
| spellingShingle | Majid Ashrafi Shahrokh Ramin Alireza Akbarzadeh Baghban The Effect of Weighted Contact Lens on Physiological Nystagmus in Young Healthy Subjects Auditory and Vestibular Research Nystagmus optokinetic nystagmus weighted contact lens |
| title | The Effect of Weighted Contact Lens on Physiological Nystagmus in Young Healthy Subjects |
| title_full | The Effect of Weighted Contact Lens on Physiological Nystagmus in Young Healthy Subjects |
| title_fullStr | The Effect of Weighted Contact Lens on Physiological Nystagmus in Young Healthy Subjects |
| title_full_unstemmed | The Effect of Weighted Contact Lens on Physiological Nystagmus in Young Healthy Subjects |
| title_short | The Effect of Weighted Contact Lens on Physiological Nystagmus in Young Healthy Subjects |
| title_sort | effect of weighted contact lens on physiological nystagmus in young healthy subjects |
| topic | Nystagmus optokinetic nystagmus weighted contact lens |
| url | https://avr.tums.ac.ir/index.php/avr/article/view/1144 |
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