Effect of Light Conditions and Accommodation on Implantable Phakic Contact Lens Vault by Anterior Segment Optical Coherence Tomography
Mohamed Salah El-Din Mahmoud, Ahmed Shawkat AbdelHalim, Hosny Ahmed Zein Ophthalmology Department, Faculty of Medicine, Minia University, Minia, EgyptCorrespondence: Mohamed Salah El-Din Mahmoud, Ophthalmology Department, Faculty of Medicine, Minia University, Minia, Egypt, Tel +20 1003321802, Email...
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| Format: | Article |
| Language: | English |
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Dove Medical Press
2022-05-01
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| Series: | Clinical Ophthalmology |
| Subjects: | |
| Online Access: | https://www.dovepress.com/effect-of-light-conditions-and-accommodation-on-implantable-phakic-con-peer-reviewed-fulltext-article-OPTH |
| _version_ | 1811252281587269632 |
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| author | Mahmoud MSE AbdelHalim AS Zein HA |
| author_facet | Mahmoud MSE AbdelHalim AS Zein HA |
| author_sort | Mahmoud MSE |
| collection | DOAJ |
| description | Mohamed Salah El-Din Mahmoud, Ahmed Shawkat AbdelHalim, Hosny Ahmed Zein Ophthalmology Department, Faculty of Medicine, Minia University, Minia, EgyptCorrespondence: Mohamed Salah El-Din Mahmoud, Ophthalmology Department, Faculty of Medicine, Minia University, Minia, Egypt, Tel +20 1003321802, Email Mohamed_Zaki@mu.edu.eg; drmsalah1982@yahoo.comPurpose: To investigate the dynamic pupil and vault changes in eyes with implantable phakic contact lens (IPCL) under photopic and scotopic settings, as well as during accommodation using the anterior segment optical coherence tomography (AS-OCT).Methods: A prospective observational study included consecutive 36 eyes of myopic patients who underwent IPCL V2.0 implantation. Under photopic and scotopic light settings, as well as during accommodation, all patients were scanned using CASIA OCT (CASIA2; TOMEY, Nagoya, Japan). The pupil size, the vault (distance between the back surface of the IPCL and the anterior lens capsule), ACD-lens (distance between the posterior corneal surface and the anterior lens surface), IPCL-lens (distance between the posterior corneal surface and the anterior IPCL surface), and lens thickness (LT) were the study parameters.Results: The vault was significantly lower under photopic conditions (p-value< 0.001). The pupil size was significantly smaller in photopic conditions (p-value< 0.001). LT (p-value=0.975) and ACD-lens (p-value=0.917) were not significantly different between scotopic and photopic conditions, while the ACD-IPCL was significantly larger during photopic conditions (p-value=0.013). There were significant changes in all parameters between accommodative and non-accommodative conditions.Conclusion: The IPCL vault decreased significantly under photopic light conditions and accommodation.Keywords: IPCL, photopic light, scotopic light, lens accommodation, vault, AS-OCT |
| first_indexed | 2024-04-12T16:32:27Z |
| format | Article |
| id | doaj.art-f349b18072484415ab87f572cc8d3895 |
| institution | Directory Open Access Journal |
| issn | 1177-5483 |
| language | English |
| last_indexed | 2024-04-12T16:32:27Z |
| publishDate | 2022-05-01 |
| publisher | Dove Medical Press |
| record_format | Article |
| series | Clinical Ophthalmology |
| spelling | doaj.art-f349b18072484415ab87f572cc8d38952022-12-22T03:25:06ZengDove Medical PressClinical Ophthalmology1177-54832022-05-01Volume 161439144775075Effect of Light Conditions and Accommodation on Implantable Phakic Contact Lens Vault by Anterior Segment Optical Coherence TomographyMahmoud MSEAbdelHalim ASZein HAMohamed Salah El-Din Mahmoud, Ahmed Shawkat AbdelHalim, Hosny Ahmed Zein Ophthalmology Department, Faculty of Medicine, Minia University, Minia, EgyptCorrespondence: Mohamed Salah El-Din Mahmoud, Ophthalmology Department, Faculty of Medicine, Minia University, Minia, Egypt, Tel +20 1003321802, Email Mohamed_Zaki@mu.edu.eg; drmsalah1982@yahoo.comPurpose: To investigate the dynamic pupil and vault changes in eyes with implantable phakic contact lens (IPCL) under photopic and scotopic settings, as well as during accommodation using the anterior segment optical coherence tomography (AS-OCT).Methods: A prospective observational study included consecutive 36 eyes of myopic patients who underwent IPCL V2.0 implantation. Under photopic and scotopic light settings, as well as during accommodation, all patients were scanned using CASIA OCT (CASIA2; TOMEY, Nagoya, Japan). The pupil size, the vault (distance between the back surface of the IPCL and the anterior lens capsule), ACD-lens (distance between the posterior corneal surface and the anterior lens surface), IPCL-lens (distance between the posterior corneal surface and the anterior IPCL surface), and lens thickness (LT) were the study parameters.Results: The vault was significantly lower under photopic conditions (p-value< 0.001). The pupil size was significantly smaller in photopic conditions (p-value< 0.001). LT (p-value=0.975) and ACD-lens (p-value=0.917) were not significantly different between scotopic and photopic conditions, while the ACD-IPCL was significantly larger during photopic conditions (p-value=0.013). There were significant changes in all parameters between accommodative and non-accommodative conditions.Conclusion: The IPCL vault decreased significantly under photopic light conditions and accommodation.Keywords: IPCL, photopic light, scotopic light, lens accommodation, vault, AS-OCThttps://www.dovepress.com/effect-of-light-conditions-and-accommodation-on-implantable-phakic-con-peer-reviewed-fulltext-article-OPTHipcl- photopic- scotopic-accommodation-vault-as-oct |
| spellingShingle | Mahmoud MSE AbdelHalim AS Zein HA Effect of Light Conditions and Accommodation on Implantable Phakic Contact Lens Vault by Anterior Segment Optical Coherence Tomography Clinical Ophthalmology ipcl- photopic- scotopic-accommodation-vault-as-oct |
| title | Effect of Light Conditions and Accommodation on Implantable Phakic Contact Lens Vault by Anterior Segment Optical Coherence Tomography |
| title_full | Effect of Light Conditions and Accommodation on Implantable Phakic Contact Lens Vault by Anterior Segment Optical Coherence Tomography |
| title_fullStr | Effect of Light Conditions and Accommodation on Implantable Phakic Contact Lens Vault by Anterior Segment Optical Coherence Tomography |
| title_full_unstemmed | Effect of Light Conditions and Accommodation on Implantable Phakic Contact Lens Vault by Anterior Segment Optical Coherence Tomography |
| title_short | Effect of Light Conditions and Accommodation on Implantable Phakic Contact Lens Vault by Anterior Segment Optical Coherence Tomography |
| title_sort | effect of light conditions and accommodation on implantable phakic contact lens vault by anterior segment optical coherence tomography |
| topic | ipcl- photopic- scotopic-accommodation-vault-as-oct |
| url | https://www.dovepress.com/effect-of-light-conditions-and-accommodation-on-implantable-phakic-con-peer-reviewed-fulltext-article-OPTH |
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