Changes in posterior corneal elevation after small incision lenticule extraction for different myopic diopters
AIM: To study the changes and effect factors of posterior corneal surface after small incision lenticule extraction (SMILE) with different myopic diopters. METHODS: Ninety eyes of 90 patients who underwent SMILE were included in this retrospective study. Patients were allocated into three groups bas...
| Principais autores: | , , , , , , , |
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| Formato: | Artigo |
| Idioma: | English |
| Publicado em: |
Press of International Journal of Ophthalmology (IJO PRESS)
2024-03-01
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| coleção: | International Journal of Ophthalmology |
| Assuntos: | |
| Acesso em linha: | http://ies.ijo.cn/en_publish/2024/3/20240311.pdf |
| _version_ | 1827340609766031360 |
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| author | Xiao-Tong Sun Yang Zhang Xiao-Kun Mei Nan-Nan Zheng Ling-Zhi Niu Xiao-Li Qu Ai-Ping Song Jian Zhuo |
| author_facet | Xiao-Tong Sun Yang Zhang Xiao-Kun Mei Nan-Nan Zheng Ling-Zhi Niu Xiao-Li Qu Ai-Ping Song Jian Zhuo |
| author_sort | Xiao-Tong Sun |
| collection | DOAJ |
| description | AIM: To study the changes and effect factors of posterior corneal surface after small incision lenticule extraction (SMILE) with different myopic diopters. METHODS: Ninety eyes of 90 patients who underwent SMILE were included in this retrospective study. Patients were allocated into three groups based on the preoperative spherical equivalent (SE): low myopia (SE≥-3.00 D), moderate myopia (-3.00 D>SE>-6.00 D) and high myopia (SE≤-6.00 D). Posterior corneal surfaces were measured by a Scheimpflug camera preoperatively and different postoperative times (1wk, 1, 3, 6mo, and 1y). Posterior mean elevation (PME) at 25 predetermined points of 3 concentric circles (2-, 4-, and 6-mm diameter) above the best fit sphere was analyzed. RESULTS: All surgeries were completed uneventfully and no ectasia was found through the observation. The difference of myopia group was significant at the 2-mm ring at 1 and 3mo postoperatively (1mo: P=0.017; 3mo: P=0.018). The effect of time on ΔPME was statistically significant (2-mm ring: P=0.001; 4-mm ring: P<0.001; 6-mm ring: P<0.001). The effect of different corneal locations on ΔPME was significant except 1wk postoperatively (1mo: P=0.000; 3mo: P=0.000; 6mo: P=0.001; 1y: P=0.001). Posterior corneal stability was linearly correlated with SE, central corneal thickness, ablation depth, residual bed thickness, percent ablation depth and percent stromal bed thickness. CONCLUSION: The posterior corneal surface changes dynamically after SMILE. No protrusion is observed on the posterior corneal surface in patients with different degrees of myopia within one year after surgery. SMILE has good stability, accuracy, safety and predictability. |
| first_indexed | 2024-03-07T21:22:58Z |
| format | Article |
| id | doaj.art-74a422af4ddd4599bcf23ac024fd02d8 |
| institution | Directory Open Access Journal |
| issn | 2222-3959 2227-4898 |
| language | English |
| last_indexed | 2024-03-07T21:22:58Z |
| publishDate | 2024-03-01 |
| publisher | Press of International Journal of Ophthalmology (IJO PRESS) |
| record_format | Article |
| series | International Journal of Ophthalmology |
| spelling | doaj.art-74a422af4ddd4599bcf23ac024fd02d82024-02-27T08:51:41ZengPress of International Journal of Ophthalmology (IJO PRESS)International Journal of Ophthalmology2222-39592227-48982024-03-0117349149810.18240/ijo.2024.03.1120240311Changes in posterior corneal elevation after small incision lenticule extraction for different myopic dioptersXiao-Tong Sun0Yang Zhang1Xiao-Kun Mei2Nan-Nan Zheng3Ling-Zhi Niu4Xiao-Li Qu5Ai-Ping Song6Jian Zhuo7Ai-Ping Song and Jian Zhuo. Department of Ophthalmology, the First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan Hospital, 16766# Jingshi Road, Jinan 250014, Shandong Province, China. 13793164931@163.com; 1151385662@qq.comDepartment of Ophthalmology, the First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan Hospital, Jinan 250014, Shandong Province, ChinaDepartment of Ophthalmology, the First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan Hospital, Jinan 250014, Shandong Province, ChinaDepartment of Ophthalmology, the First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan Hospital, Jinan 250014, Shandong Province, ChinaDepartment of Ophthalmology, the First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan Hospital, Jinan 250014, Shandong Province, ChinaDepartment of Ophthalmology, the First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan Hospital, Jinan 250014, Shandong Province, ChinaDepartment of Ophthalmology, the First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan Hospital, Jinan 250014, Shandong Province, ChinaDepartment of Ophthalmology, the First Affiliated Hospital of Shandong First Medical University, Shandong Provincial Qianfoshan Hospital, Jinan 250014, Shandong Province, ChinaAIM: To study the changes and effect factors of posterior corneal surface after small incision lenticule extraction (SMILE) with different myopic diopters. METHODS: Ninety eyes of 90 patients who underwent SMILE were included in this retrospective study. Patients were allocated into three groups based on the preoperative spherical equivalent (SE): low myopia (SE≥-3.00 D), moderate myopia (-3.00 D>SE>-6.00 D) and high myopia (SE≤-6.00 D). Posterior corneal surfaces were measured by a Scheimpflug camera preoperatively and different postoperative times (1wk, 1, 3, 6mo, and 1y). Posterior mean elevation (PME) at 25 predetermined points of 3 concentric circles (2-, 4-, and 6-mm diameter) above the best fit sphere was analyzed. RESULTS: All surgeries were completed uneventfully and no ectasia was found through the observation. The difference of myopia group was significant at the 2-mm ring at 1 and 3mo postoperatively (1mo: P=0.017; 3mo: P=0.018). The effect of time on ΔPME was statistically significant (2-mm ring: P=0.001; 4-mm ring: P<0.001; 6-mm ring: P<0.001). The effect of different corneal locations on ΔPME was significant except 1wk postoperatively (1mo: P=0.000; 3mo: P=0.000; 6mo: P=0.001; 1y: P=0.001). Posterior corneal stability was linearly correlated with SE, central corneal thickness, ablation depth, residual bed thickness, percent ablation depth and percent stromal bed thickness. CONCLUSION: The posterior corneal surface changes dynamically after SMILE. No protrusion is observed on the posterior corneal surface in patients with different degrees of myopia within one year after surgery. SMILE has good stability, accuracy, safety and predictability.http://ies.ijo.cn/en_publish/2024/3/20240311.pdfmyopiaposterior corneal elevationcorneal ectasiasmall incision lenticule extraction |
| spellingShingle | Xiao-Tong Sun Yang Zhang Xiao-Kun Mei Nan-Nan Zheng Ling-Zhi Niu Xiao-Li Qu Ai-Ping Song Jian Zhuo Changes in posterior corneal elevation after small incision lenticule extraction for different myopic diopters International Journal of Ophthalmology myopia posterior corneal elevation corneal ectasia small incision lenticule extraction |
| title | Changes in posterior corneal elevation after small incision lenticule extraction for different myopic diopters |
| title_full | Changes in posterior corneal elevation after small incision lenticule extraction for different myopic diopters |
| title_fullStr | Changes in posterior corneal elevation after small incision lenticule extraction for different myopic diopters |
| title_full_unstemmed | Changes in posterior corneal elevation after small incision lenticule extraction for different myopic diopters |
| title_short | Changes in posterior corneal elevation after small incision lenticule extraction for different myopic diopters |
| title_sort | changes in posterior corneal elevation after small incision lenticule extraction for different myopic diopters |
| topic | myopia posterior corneal elevation corneal ectasia small incision lenticule extraction |
| url | http://ies.ijo.cn/en_publish/2024/3/20240311.pdf |
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