This preprint is under consideration at International Ophthalmology. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
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Research Article
Şefik Can İpek
Agri Ibrahim Cecen University: Agri Ibrahim Cecen Universitesi
Corresponding Author
License:
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Purpose: To investigate earlier corneal topographical changes and visual acuity after different pterygium surgical techniques using the Pentacam Scheimpflug imaging system.
Methods: This study enrolled 98 patients with unilateral primary nasal pterygium. Pterygium surgery with either a conjunctival autograft (group 1) or an anchored conjunctival rotational flap (group 2), with fibrin tissue adhesive was performed under topical anesthesia. Baseline and one-month post-operative best-corrected visual acuity (BCVA) in logarithm of the Minimum Angle of Resolution (logMAR) and anterior corneal astigmatism (ACA), flat keratometry (Kf), steep keratometry (Ks) and posterior corneal astigmatism (PCA) were analyzed.
Results: Mean BCVA improved from baseline 0.119±0.113 to 0.082±0.086 logMAR in group 1, and from baseline 0.169±0.128 to 0.120±0.121 logMAR in group 2. There were no statistically significant differences between the two groups in pre-and post-operative ACA, PCA, Kf and Ks. (p=0.686; 0.9020.107; and 0.592, respectively). Intra-group analysis revealed statistically significant differences in both groups: ACA (p<0.001 for both groups), with a greater difference in group 1 (2.072), and Kf (p<0.001 for both groups), with a slightly greater change in group 2 (1.910). While there were no statistically significant Ks intra-group differences in both groups (group 1: p=0.091; group 2: 0.092), group 1 (0.0522) displayed more Ks changes. There were also no statistically significant intra-group PCA differences in both groups (p=0.061 for both groups). However, Group 2 (-0.020) displayed greater changes.
Conclusions: Significantly improved anterior corneal topographical changes highly associated with conjunctival autografting. However, the conjunctival rotational flap was associated with relatively greater posterior corneal topographical changes.
Keywords
Pterygium, Conjunctival Autograft, Conjunctival Rotational Flap, Corneal Topography, Pentacam Scheimpflug imaging
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CURRENT STATUS: Under Review
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Posted 10 Mar, 2021
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Review #? received
Received 05 Apr, 2021
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On 26 Feb, 2021
First submitted
On 25 Feb, 2021
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Subject Areas
Ophthalmology
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This preprint is under consideration at International Ophthalmology. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research Article
Şefik Can İpek
Agri Ibrahim Cecen University: Agri Ibrahim Cecen Universitesi
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 1
Posted 10 Mar, 2021
No community comments so far
Review #? received
Received 05 Apr, 2021
Reviewers invited
Invitations sent on 06 Mar, 2021
Editor assigned
On 26 Feb, 2021
First submitted
On 25 Feb, 2021
Subject Areas
Ophthalmology
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Purpose: To investigate earlier corneal topographical changes and visual acuity after different pterygium surgical techniques using the Pentacam Scheimpflug imaging system.
Methods: This study enrolled 98 patients with unilateral primary nasal pterygium. Pterygium surgery with either a conjunctival autograft (group 1) or an anchored conjunctival rotational flap (group 2), with fibrin tissue adhesive was performed under topical anesthesia. Baseline and one-month post-operative best-corrected visual acuity (BCVA) in logarithm of the Minimum Angle of Resolution (logMAR) and anterior corneal astigmatism (ACA), flat keratometry (Kf), steep keratometry (Ks) and posterior corneal astigmatism (PCA) were analyzed.
Results: Mean BCVA improved from baseline 0.119±0.113 to 0.082±0.086 logMAR in group 1, and from baseline 0.169±0.128 to 0.120±0.121 logMAR in group 2. There were no statistically significant differences between the two groups in pre-and post-operative ACA, PCA, Kf and Ks. (p=0.686; 0.9020.107; and 0.592, respectively). Intra-group analysis revealed statistically significant differences in both groups: ACA (p<0.001 for both groups), with a greater difference in group 1 (2.072), and Kf (p<0.001 for both groups), with a slightly greater change in group 2 (1.910). While there were no statistically significant Ks intra-group differences in both groups (group 1: p=0.091; group 2: 0.092), group 1 (0.0522) displayed more Ks changes. There were also no statistically significant intra-group PCA differences in both groups (p=0.061 for both groups). However, Group 2 (-0.020) displayed greater changes.
Conclusions: Significantly improved anterior corneal topographical changes highly associated with conjunctival autografting. However, the conjunctival rotational flap was associated with relatively greater posterior corneal topographical changes.
Figure 1
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