Assessment of the Pupil Size in Emmetropic and Myopic Eyes
Introduction: This study aimed to determine the influence of age and gender on pupil size under different illuminance conditions in emmetropic and myopic healthy eyes using Keratograph 4 topography. Methods: This study investigated 221 eyes of 221 subjects. After complete ocular examination, the und...
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| Format: | Article |
| Language: | English |
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Mashhad University of Medical Sciences
2020-09-01
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| Series: | Reviews in Clinical Medicine |
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| Online Access: | https://rcm.mums.ac.ir/article_16738_4d2eb61fe5574b181e9d3d67fa75e2e1.pdf |
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| author | Negareh Yazdani Nasrin Moghadas Sharif Maliheh Karimpour Asieh Ehsaei |
| author_facet | Negareh Yazdani Nasrin Moghadas Sharif Maliheh Karimpour Asieh Ehsaei |
| author_sort | Negareh Yazdani |
| collection | DOAJ |
| description | Introduction: This study aimed to determine the influence of age and gender on pupil size under different illuminance conditions in emmetropic and myopic healthy eyes using Keratograph 4 topography. Methods: This study investigated 221 eyes of 221 subjects. After complete ocular examination, the undilated pupil diameters were measured using a pupilometer and Keratograph 4 software (OCULUS, Wetzlar, Germany) with a sequence of 9.8 seconds of the scotopic stimulus (0.1 lux) and 0.2 seconds of the photopic stimulus (150 lux) repeated 5 times automatically. At the end of the procedure, the software provided maximum and minimum values (scotopic and photopic) of the pupil diameter. The age, gender, and refraction related changes of the pupil size were evaluated in different illuminance conditions. Results: Out of 221 participants in this study, 122 (85 female) and 99 (66 female) cases were myopes (MSE: -2.18±1.69 D, age: 26.03±6.98 years) and emmetropes (MSE: -0.11±0.27 D, age: 28.05±10.17 years), respectively. Considering refractive groups, pupil size was larger in myopes, compared to the emmetropes in both illuminance conditions (p <0.001). Moreover, the pupil size was found to be independent of gender in both photopic and scotopic conditions (P=0.71 and P=0.55, respectively). Additionally, a significant decrease was observed in pupil size with increasing age (p <0.001). Conclusion: This study showed that pupil size is influenced by age, illumination levels, and refractive status. These findings are important in both the optical industry and clinical decision-making process regarding treatment management. |
| first_indexed | 2024-04-11T04:45:14Z |
| format | Article |
| id | doaj.art-17bc9be6992b4099b6520517ec203620 |
| institution | Directory Open Access Journal |
| issn | 2345-6256 2345-6892 |
| language | English |
| last_indexed | 2024-04-11T04:45:14Z |
| publishDate | 2020-09-01 |
| publisher | Mashhad University of Medical Sciences |
| record_format | Article |
| series | Reviews in Clinical Medicine |
| spelling | doaj.art-17bc9be6992b4099b6520517ec2036202022-12-27T13:03:45ZengMashhad University of Medical SciencesReviews in Clinical Medicine2345-62562345-68922020-09-017311011310.22038/rcm.2020.50392.132816738Assessment of the Pupil Size in Emmetropic and Myopic EyesNegareh Yazdani0Nasrin Moghadas Sharif1Maliheh Karimpour2Asieh Ehsaei3Department of Optometry, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, IranDepartment of Optometry, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, IranDepartment of Optometry, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, IranDepartment of Optometry, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran. Refractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.Introduction: This study aimed to determine the influence of age and gender on pupil size under different illuminance conditions in emmetropic and myopic healthy eyes using Keratograph 4 topography. Methods: This study investigated 221 eyes of 221 subjects. After complete ocular examination, the undilated pupil diameters were measured using a pupilometer and Keratograph 4 software (OCULUS, Wetzlar, Germany) with a sequence of 9.8 seconds of the scotopic stimulus (0.1 lux) and 0.2 seconds of the photopic stimulus (150 lux) repeated 5 times automatically. At the end of the procedure, the software provided maximum and minimum values (scotopic and photopic) of the pupil diameter. The age, gender, and refraction related changes of the pupil size were evaluated in different illuminance conditions. Results: Out of 221 participants in this study, 122 (85 female) and 99 (66 female) cases were myopes (MSE: -2.18±1.69 D, age: 26.03±6.98 years) and emmetropes (MSE: -0.11±0.27 D, age: 28.05±10.17 years), respectively. Considering refractive groups, pupil size was larger in myopes, compared to the emmetropes in both illuminance conditions (p <0.001). Moreover, the pupil size was found to be independent of gender in both photopic and scotopic conditions (P=0.71 and P=0.55, respectively). Additionally, a significant decrease was observed in pupil size with increasing age (p <0.001). Conclusion: This study showed that pupil size is influenced by age, illumination levels, and refractive status. These findings are important in both the optical industry and clinical decision-making process regarding treatment management.https://rcm.mums.ac.ir/article_16738_4d2eb61fe5574b181e9d3d67fa75e2e1.pdfpupil sizekeratographagegendermyopiaemmetropia |
| spellingShingle | Negareh Yazdani Nasrin Moghadas Sharif Maliheh Karimpour Asieh Ehsaei Assessment of the Pupil Size in Emmetropic and Myopic Eyes Reviews in Clinical Medicine pupil size keratograph age gender myopia emmetropia |
| title | Assessment of the Pupil Size in Emmetropic and Myopic Eyes |
| title_full | Assessment of the Pupil Size in Emmetropic and Myopic Eyes |
| title_fullStr | Assessment of the Pupil Size in Emmetropic and Myopic Eyes |
| title_full_unstemmed | Assessment of the Pupil Size in Emmetropic and Myopic Eyes |
| title_short | Assessment of the Pupil Size in Emmetropic and Myopic Eyes |
| title_sort | assessment of the pupil size in emmetropic and myopic eyes |
| topic | pupil size keratograph age gender myopia emmetropia |
| url | https://rcm.mums.ac.ir/article_16738_4d2eb61fe5574b181e9d3d67fa75e2e1.pdf |
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