Comparative analysis of IOL power calculations in postoperative refractive surgery patients: a theoretical surgical model for FS-LASIK and SMILE procedures
Abstract Background As the two most prevalent refractive surgeries in China, there is a substantial number of patients who have undergone Femtosecond Laser-assisted In Situ Keratomileusis (FS-LASIK) and Small Incision Lenticule Extraction (SMILE) procedures. However, there is still limited knowledge...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
BMC
2023-10-01
|
| Series: | BMC Ophthalmology |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s12886-023-03164-0 |
| _version_ | 1797577384954691584 |
|---|---|
| author | Liangpin Li Liyun Yuan Kun Yang Yanan Wu Xia Hua Yan Wang Xiaoyong Yuan |
| author_facet | Liangpin Li Liyun Yuan Kun Yang Yanan Wu Xia Hua Yan Wang Xiaoyong Yuan |
| author_sort | Liangpin Li |
| collection | DOAJ |
| description | Abstract Background As the two most prevalent refractive surgeries in China, there is a substantial number of patients who have undergone Femtosecond Laser-assisted In Situ Keratomileusis (FS-LASIK) and Small Incision Lenticule Extraction (SMILE) procedures. However, there is still limited knowledge regarding the selection of intraocular lens (IOL) power calculation formulas for these patients with a history of FS-LASIK or SMILE. Methods A total of 100 eyes from 50 postoperative refractive surgery patients were included in this prospective cohort study, with 25 individuals (50 eyes) having undergone FS-LASIK and 25 individuals (50 eyes) having undergone SMILE. We utilized a theoretical surgical model to simulate the IOL implantation process in postoperative FS-LASIK and SMILE patients. Subsequently, we performed comprehensive biological measurements both before and after the surgeries, encompassing demographic information, corneal biometric parameters, and axial length. Various formulas, including the Barrett Universal II (BUII) formula, as a baseline, were employed to calculate IOL power for the patients. Results The Barrett True K (BTK) formula, demonstrated an mean absolute error (AE) within 0.5 D for both FS-LASIK and SMILE groups (0.28 ± 0.25 D and 0.36 ± 0.24 D, respectively). Notably, the FS-LASIK group showed 82% of results differing by less than 0.25 D compared to preoperative BUII results. The Barrett True K No History (BTKNH) formula, which also incorporates measured posterior corneal curvature, performed similarly to BTK in both groups. Additionally, the Masket formula, relying on refractive changes based on empirical experience, displayed promising potential for IOL calculations in SMILE patients compared with BTK (p = 0.411). Conclusion The study reveals the accuracy and stability of the BTK and BTKNH formulas for IOL power calculations in myopic FS-LASIK/SMILE patients. Moreover, the Masket formula shows encouraging results in SMILE patients. These findings contribute to enhancing the predictability and success of IOL power calculations in patients with a history of refractive surgery, providing valuable insights for clinical practice. Further research and larger sample sizes are warranted to validate and optimize the identified formulas for better patient outcomes. |
| first_indexed | 2024-03-10T22:07:28Z |
| format | Article |
| id | doaj.art-88e6e87b813b4588b32b057d1fa2ddc2 |
| institution | Directory Open Access Journal |
| issn | 1471-2415 |
| language | English |
| last_indexed | 2024-03-10T22:07:28Z |
| publishDate | 2023-10-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Ophthalmology |
| spelling | doaj.art-88e6e87b813b4588b32b057d1fa2ddc22023-11-19T12:45:21ZengBMCBMC Ophthalmology1471-24152023-10-012311910.1186/s12886-023-03164-0Comparative analysis of IOL power calculations in postoperative refractive surgery patients: a theoretical surgical model for FS-LASIK and SMILE proceduresLiangpin Li0Liyun Yuan1Kun Yang2Yanan Wu3Xia Hua4Yan Wang5Xiaoyong Yuan6Clinical College of Ophthalmology, Tianjin Medical UniversitySchool of Medicine, Nankai UniversityTianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin Eye Institute, Tianjin Eye HospitalTianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin Eye Institute, Tianjin Eye HospitalTianjin Aier Eye Hospital, Tianjin UniversityClinical College of Ophthalmology, Tianjin Medical UniversityClinical College of Ophthalmology, Tianjin Medical UniversityAbstract Background As the two most prevalent refractive surgeries in China, there is a substantial number of patients who have undergone Femtosecond Laser-assisted In Situ Keratomileusis (FS-LASIK) and Small Incision Lenticule Extraction (SMILE) procedures. However, there is still limited knowledge regarding the selection of intraocular lens (IOL) power calculation formulas for these patients with a history of FS-LASIK or SMILE. Methods A total of 100 eyes from 50 postoperative refractive surgery patients were included in this prospective cohort study, with 25 individuals (50 eyes) having undergone FS-LASIK and 25 individuals (50 eyes) having undergone SMILE. We utilized a theoretical surgical model to simulate the IOL implantation process in postoperative FS-LASIK and SMILE patients. Subsequently, we performed comprehensive biological measurements both before and after the surgeries, encompassing demographic information, corneal biometric parameters, and axial length. Various formulas, including the Barrett Universal II (BUII) formula, as a baseline, were employed to calculate IOL power for the patients. Results The Barrett True K (BTK) formula, demonstrated an mean absolute error (AE) within 0.5 D for both FS-LASIK and SMILE groups (0.28 ± 0.25 D and 0.36 ± 0.24 D, respectively). Notably, the FS-LASIK group showed 82% of results differing by less than 0.25 D compared to preoperative BUII results. The Barrett True K No History (BTKNH) formula, which also incorporates measured posterior corneal curvature, performed similarly to BTK in both groups. Additionally, the Masket formula, relying on refractive changes based on empirical experience, displayed promising potential for IOL calculations in SMILE patients compared with BTK (p = 0.411). Conclusion The study reveals the accuracy and stability of the BTK and BTKNH formulas for IOL power calculations in myopic FS-LASIK/SMILE patients. Moreover, the Masket formula shows encouraging results in SMILE patients. These findings contribute to enhancing the predictability and success of IOL power calculations in patients with a history of refractive surgery, providing valuable insights for clinical practice. Further research and larger sample sizes are warranted to validate and optimize the identified formulas for better patient outcomes.https://doi.org/10.1186/s12886-023-03164-0IOL power calculation formulaSMILEFS-LASIKRefractive errorKeratometry |
| spellingShingle | Liangpin Li Liyun Yuan Kun Yang Yanan Wu Xia Hua Yan Wang Xiaoyong Yuan Comparative analysis of IOL power calculations in postoperative refractive surgery patients: a theoretical surgical model for FS-LASIK and SMILE procedures BMC Ophthalmology IOL power calculation formula SMILE FS-LASIK Refractive error Keratometry |
| title | Comparative analysis of IOL power calculations in postoperative refractive surgery patients: a theoretical surgical model for FS-LASIK and SMILE procedures |
| title_full | Comparative analysis of IOL power calculations in postoperative refractive surgery patients: a theoretical surgical model for FS-LASIK and SMILE procedures |
| title_fullStr | Comparative analysis of IOL power calculations in postoperative refractive surgery patients: a theoretical surgical model for FS-LASIK and SMILE procedures |
| title_full_unstemmed | Comparative analysis of IOL power calculations in postoperative refractive surgery patients: a theoretical surgical model for FS-LASIK and SMILE procedures |
| title_short | Comparative analysis of IOL power calculations in postoperative refractive surgery patients: a theoretical surgical model for FS-LASIK and SMILE procedures |
| title_sort | comparative analysis of iol power calculations in postoperative refractive surgery patients a theoretical surgical model for fs lasik and smile procedures |
| topic | IOL power calculation formula SMILE FS-LASIK Refractive error Keratometry |
| url | https://doi.org/10.1186/s12886-023-03164-0 |
| work_keys_str_mv | AT liangpinli comparativeanalysisofiolpowercalculationsinpostoperativerefractivesurgerypatientsatheoreticalsurgicalmodelforfslasikandsmileprocedures AT liyunyuan comparativeanalysisofiolpowercalculationsinpostoperativerefractivesurgerypatientsatheoreticalsurgicalmodelforfslasikandsmileprocedures AT kunyang comparativeanalysisofiolpowercalculationsinpostoperativerefractivesurgerypatientsatheoreticalsurgicalmodelforfslasikandsmileprocedures AT yananwu comparativeanalysisofiolpowercalculationsinpostoperativerefractivesurgerypatientsatheoreticalsurgicalmodelforfslasikandsmileprocedures AT xiahua comparativeanalysisofiolpowercalculationsinpostoperativerefractivesurgerypatientsatheoreticalsurgicalmodelforfslasikandsmileprocedures AT yanwang comparativeanalysisofiolpowercalculationsinpostoperativerefractivesurgerypatientsatheoreticalsurgicalmodelforfslasikandsmileprocedures AT xiaoyongyuan comparativeanalysisofiolpowercalculationsinpostoperativerefractivesurgerypatientsatheoreticalsurgicalmodelforfslasikandsmileprocedures |