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Paraskevopoulos K, Karakosta C, Feretzakis G, Liaskou M, Kafetsouli D, Kokolaki A, Droutsas K, Papakonstantinou D, Georgalas I. Corneal tomography changes following major (6 mm) medial rectus muscle recession: a prospective cohort study using Pentacam®. Strabismus 2024; 32:39-47. [PMID: 38311603 DOI: 10.1080/09273972.2024.2311094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2024]
Abstract
INTRODUCTION The aim of this study is to evaluate changes in corneal astigmatism, axial anterior corneal curvature, as well as changes in the anterior chamber depth and central corneal thickness, 2 months following the unilateral recession of medial rectus muscle in children. METHODS Thirty-three children with esotropia were prospectively evaluated following unilateral medial rectus muscle recession, using Pentacam®. Comparisons were made between the operated and fellow unoperated eyes, pre, and postoperatively. The assessment was made for changes in the radius of axial curvature on major meridians at 3 and 3.5 mm from the optical corneal center in the mid-peripheral zone. Astigmatism changes of the anterior and posterior corneal surface were calculated using vector analysis software (astigMATIC®). ANOVA model was used to examine the interaction between age or central corneal thickness and postoperative changes in anterior and posterior surface corneal astigmatism. RESULTS In the intervention group, changes in anterior and posterior corneal surface astigmatism were statistically significant, with a mean increase of 0.59Dx92 and 0.08Dx91, respectively. In the mid-peripheral corneal zone, there is an increase in the radius of anterior corneal axial curvature more evident nasally 3.5 mm from the corneal center on the horizontal meridian, with corresponding decrease superiorly and inferiorly at 3 and 3.5 mm from the corneal center on the vertical meridian. DISCUSSION The changes in total astigmatism of the operated eyes are mainly attributed to the anterior corneal surface. These changes are associated with flattening in the 180 meridian of the cornea, leading to a shift to "with-the-rule" astigmatism.
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Affiliation(s)
- Konstantinos Paraskevopoulos
- Department of Ophthalmology, Penteli General Hospital for Children, Athens
- First Ophthalmology Department, "G. Gennimatas" Hospital, National and Kapodistrian University of Athens,Athens, Greece
| | - Christina Karakosta
- Department of Ophthalmology, Penteli General Hospital for Children, Athens
- First Ophthalmology Department, "G. Gennimatas" Hospital, National and Kapodistrian University of Athens,Athens, Greece
| | | | - Maria Liaskou
- Department of Ophthalmology, Penteli General Hospital for Children, Athens
| | - Dimitra Kafetsouli
- Department of Hygiene and Epidemiology, University of Thessaly, Larissa, Greece
| | - Anna Kokolaki
- Department of Ophthalmology, Penteli General Hospital for Children, Athens
| | - Konstantinos Droutsas
- First Ophthalmology Department, "G. Gennimatas" Hospital, National and Kapodistrian University of Athens,Athens, Greece
| | - Dimitrios Papakonstantinou
- First Ophthalmology Department, "G. Gennimatas" Hospital, National and Kapodistrian University of Athens,Athens, Greece
| | - Ilias Georgalas
- First Ophthalmology Department, "G. Gennimatas" Hospital, National and Kapodistrian University of Athens,Athens, Greece
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Karakosta C, Bougioukas KI, Karra M, Kontopanos G, Methenitis G, Liaskou M, Paraskevopoulos K, Kokolaki A. Changes in astigmatism after horizontal muscle recession strabismus surgery: A retrospective cohort study. Indian J Ophthalmol 2021; 69:1888-1893. [PMID: 34146052 PMCID: PMC8374751 DOI: 10.4103/ijo.ijo_3228_20] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose: The aim of this study was to evaluate the changes in astigmatism after unilateral recession of horizontal rectus muscles in pediatric patients. Methods: The authors retrospectively evaluated the medical history of 52 children with esotropia or exotropia, that underwent a unilateral recession strabismus surgery. The intervention group consisted of the 52 eyes that underwent strabismus surgery, and the control group consisted of the other 52 fellow unoperated eyes of the same participants. The intervention group was divided into medial and lateral rectus muscle subgroups, and four subgroups based on the astigmatism axis preoperatively (A: with-the-rule astigmatism, B: no astigmatism, C: intermediate meridians, D: against-the-rule astigmatism). All patients were examined one day preoperatively, and then, six weeks postoperatively. Paired tests were conducted, and the significant level was set to 0.05 or was adjusted for subgroups. Results: A mean difference 0.43 D of astigmatism (95% CI: 0.27, 0.59) was observed after the surgery between intervention and control group (P < 0.001). Astigmatism change (postoperative - preoperative) in subgroup A was 0.50 D (P < 0.001) and in subgroup B was 0.75 D (P < 0.001). Moreover, astigmatism changes of 0.50 D were found in both lateral (P < 0.001) and medial rectus muscle group (P = 0.002). Conclusion: Strabismus surgery appears to be associated with alterations in astigmatism, and in particular increase in cylindrical power in the eyes that had with-the-rule astigmatism or no astigmatism preoperatively. Those changes should be considered when planning the operation, to avoid transforming clinically non-significant astigmatism into clinically significant.
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Affiliation(s)
- Christina Karakosta
- Department of Health Sciences, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki; Department of Ophthalmology, Penteli General Hospital for Children, Athens, Greece
| | - Konstantinos I Bougioukas
- Department of Health Sciences, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Martha Karra
- Department of Ophthalmology, Penteli General Hospital for Children, Athens, Greece
| | - Georgios Kontopanos
- Department of Ophthalmology, Penteli General Hospital for Children, Athens, Greece
| | - Georgios Methenitis
- Department of Ophthalmology, Penteli General Hospital for Children, Athens, Greece
| | - Maria Liaskou
- Department of Ophthalmology, Penteli General Hospital for Children, Athens, Greece
| | | | - Anna Kokolaki
- Department of Ophthalmology, Penteli General Hospital for Children, Athens, Greece
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Su T, He Y, Liu S, Wu X, Wen D, Wang J, Hu S, Min X. Transient Increase of Wavefront Aberrations after Horizontal Rectus Muscle Surgery in Exotropia. Curr Eye Res 2019; 44:1393-1398. [PMID: 31256683 DOI: 10.1080/02713683.2019.1638417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Aims: Wavefront aberration (WA) has become one of the important indicators for measuring the visual quality. Whether strabismus surgery affects the WA remain controversial. This study aims to investigate the postoperative alterations of WA in patients who underwent horizontal rectus muscle surgery.Methods: A total of 34 patients were enrolled and divided into two groups: bilateral lateral rectus recession (BLR) group and unilateral lateral rectus recession and medial rectus resection (R&R) group. The WA was examined 1 day before surgery, 3 days, and 6 weeks after surgery using the iTrace Visual Function Analyzer (Tracey Technologies).Results: Significant increases in total WA, lower-order aberration (LOA) and higher-order aberration (HOA) of both groups were detected in 3 days after surgery (P < 0.05), while no significant differences in 6 weeks after surgery. Significant increases in astigmatism, secondary astigmatism, and trefoil of both groups were detected in 3 days after surgery (P < 0.05), while no significant differences in individual order of LOA and HOA in 6 weeks postoperatively. Z22, Z33, and Z42 of both groups increased significantly 3 days after surgery (P < 0.05) and returned to baseline level 6 weeks after surgery, while the rest Zernike coefficients remained the same postoperatively. When comparing the differences between the two groups, there were no statistically significant differences in these parameters between baseline and each follow-up visit postoperatively.Conclusions: The increase of WA restored to pre-operative level in 6 weeks after surgery, indicating the influences of horizontal rectus muscle surgery to WA were transient and reversible.
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Affiliation(s)
- Ting Su
- Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, School of Medicine, Xiamen University, Xiamen, Fujian, China.,Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Ye He
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Shuangzhen Liu
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xiaoying Wu
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Dan Wen
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jieyue Wang
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Shengfa Hu
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xiaoshan Min
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan, China
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