The effect of lateral tarsal strip surgery on corneal biomechanical parameters measured by Corvis ST
Purpose: To evaluate the effect of lateral tarsal strip (LTS) surgery for involutional ectropion on corneal biomechanical properties measured by the Corvis ST device. Methods: This prospective clinical study examined 23 patients (mean age 67.7 years) undergoing LTS for involutional ectropion. Cornea...
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Elsevier
2024-12-01
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| Series: | Results in Optics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666950124001482 |
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| author | Alaa Mohammad Alghurab Ali H. Alnasraw Maythum Ali Shallan Rawaa Awad Kadhum Heba G. Abdelzaher M.A. Abdelzaher |
| author_facet | Alaa Mohammad Alghurab Ali H. Alnasraw Maythum Ali Shallan Rawaa Awad Kadhum Heba G. Abdelzaher M.A. Abdelzaher |
| author_sort | Alaa Mohammad Alghurab |
| collection | DOAJ |
| description | Purpose: To evaluate the effect of lateral tarsal strip (LTS) surgery for involutional ectropion on corneal biomechanical properties measured by the Corvis ST device. Methods: This prospective clinical study examined 23 patients (mean age 67.7 years) undergoing LTS for involutional ectropion. Corneal biomechanics were evaluated preoperatively and at 1 month postoperatively using the Corvis ST. Deformation amplitude, applanation length, highest concavity measurements, and corneal biomechanical indices were compared before and after LTS. Results: The second applanation deformation amplitude was significantly reduced after LTS compared to before (0.471 vs 0.428 mm, p = 0.031) indicating improved corneal stiffness. First applanation deflection length also decreased significantly following surgery (2.342 vs 1.967 mm, p = 0.043) suggesting enhanced corneal stability. Highest concavity deformation parameters were unchanged. Corneal biomechanical index, stiffness parameter, and intraocular pressure compensatory effect showed no significant differences pre- versus post-operatively. Conclusions: LTS surgery leads to measurable improvements in select corneal biomechanical parameters, specifically applanation deformation amplitude and deflection length. This preliminary analysis reveals subtle beneficial impacts on corneal stiffness and stability after surgical correction of ectropion. LTS appears to marginally augment corneal biomechanical properties based on Corvis ST assessment. |
| format | Article |
| id | doaj-art-8cfdd6d637d64ff9bb19c99d0a970a44 |
| institution | Kabale University |
| issn | 2666-9501 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Optics |
| spelling | doaj-art-8cfdd6d637d64ff9bb19c99d0a970a442024-12-11T05:58:05ZengElsevierResults in Optics2666-95012024-12-0117100751The effect of lateral tarsal strip surgery on corneal biomechanical parameters measured by Corvis STAlaa Mohammad Alghurab0Ali H. Alnasraw1Maythum Ali Shallan2Rawaa Awad Kadhum3Heba G. Abdelzaher4M.A. Abdelzaher5Optics Techniques Department, College of Health and Medical Techniques, Al-Mustaqbal University, 51001 Babylon, IraqOptics Techniques Department, College of Health and Medical Techniques, Al-Mustaqbal University, 51001 Babylon, IraqAnesthesia Techniques Department, College of Health and Medical Techniques, Al-Mustaqbal University, 51001 Babylon, IraqAnesthesia Techniques Department, College of Health and Medical Techniques, Al-Mustaqbal University, 51001 Babylon, IraqDepartment of Clinical Pharmacy, Faculty of Pharmacy, Minia University, 61519 Minia,EgyptAnesthesia Techniques Department, College of Health and Medical Techniques, Al-Mustaqbal University, 51001 Babylon, Iraq; Environmental Science and Industrial Development Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef 62511, Egypt; Corresponding author at: Environmental Science and Industrial Development Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef 62511, Egypt.Purpose: To evaluate the effect of lateral tarsal strip (LTS) surgery for involutional ectropion on corneal biomechanical properties measured by the Corvis ST device. Methods: This prospective clinical study examined 23 patients (mean age 67.7 years) undergoing LTS for involutional ectropion. Corneal biomechanics were evaluated preoperatively and at 1 month postoperatively using the Corvis ST. Deformation amplitude, applanation length, highest concavity measurements, and corneal biomechanical indices were compared before and after LTS. Results: The second applanation deformation amplitude was significantly reduced after LTS compared to before (0.471 vs 0.428 mm, p = 0.031) indicating improved corneal stiffness. First applanation deflection length also decreased significantly following surgery (2.342 vs 1.967 mm, p = 0.043) suggesting enhanced corneal stability. Highest concavity deformation parameters were unchanged. Corneal biomechanical index, stiffness parameter, and intraocular pressure compensatory effect showed no significant differences pre- versus post-operatively. Conclusions: LTS surgery leads to measurable improvements in select corneal biomechanical parameters, specifically applanation deformation amplitude and deflection length. This preliminary analysis reveals subtle beneficial impacts on corneal stiffness and stability after surgical correction of ectropion. LTS appears to marginally augment corneal biomechanical properties based on Corvis ST assessment.http://www.sciencedirect.com/science/article/pii/S2666950124001482Lateral tarsal stripEctropionCorneal biomechanicsCorvis STCornea |
| spellingShingle | Alaa Mohammad Alghurab Ali H. Alnasraw Maythum Ali Shallan Rawaa Awad Kadhum Heba G. Abdelzaher M.A. Abdelzaher The effect of lateral tarsal strip surgery on corneal biomechanical parameters measured by Corvis ST Results in Optics Lateral tarsal strip Ectropion Corneal biomechanics Corvis ST Cornea |
| title | The effect of lateral tarsal strip surgery on corneal biomechanical parameters measured by Corvis ST |
| title_full | The effect of lateral tarsal strip surgery on corneal biomechanical parameters measured by Corvis ST |
| title_fullStr | The effect of lateral tarsal strip surgery on corneal biomechanical parameters measured by Corvis ST |
| title_full_unstemmed | The effect of lateral tarsal strip surgery on corneal biomechanical parameters measured by Corvis ST |
| title_short | The effect of lateral tarsal strip surgery on corneal biomechanical parameters measured by Corvis ST |
| title_sort | effect of lateral tarsal strip surgery on corneal biomechanical parameters measured by corvis st |
| topic | Lateral tarsal strip Ectropion Corneal biomechanics Corvis ST Cornea |
| url | http://www.sciencedirect.com/science/article/pii/S2666950124001482 |
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