Abstract
Background: Both pterygium ingrowth and excision determine alterations in corneal topography. The aim of this study was to evaluate the influence of pterygium removal combined with conjunctival autografts in addition to the use of human fibrin tissue glue on changes in corneal parameters as measured by 3-D swept-source anterior segment optical coherence tomography (AS-OCT) imaging. Methods: Sixteen eyes (16 patients) with pterygium that qualified for surgical treatment were enrolled in this study. Eye examination, slit lamp, and 3-D AS-OCT (CASIA 2) assessment were performed before the surgery and 7 days, 1 month, and 6 months after pterygium excision. Topographic parameters of both anterior and posterior surfaces of the cornea were analysed at each follow-up visit. Results: The gradual decrease in total astigmatism power from preoperative median 2.75 (6.15) D to 1.2 (1.1) D at 6-month follow-up (p = 0.034) was noted from the day 7 visit. Values were strongly influenced by variations of anterior cornea astigmatism. In contrast, a gradual total HOA reduction at the 1-month (from median 0.79 (1.3) D to 0.44 (0.27) D; p = 0.038) and at 6-month visits (0.25 (0.09); p = 0.001) was observed. Similarly, values were strongly influenced by variations of the anterior. Additionally, total average keratometry values increased from preoperative 44.05 (2.25) D to 44.6 (1.9) (p = 0.043) 1 month after the surgery. Conclusions: Significant steepening of the anterior cornea and a reduction in both astigmatism and HOA were observed after pterygium excision. The anterior corneal surface was an essential component of the total postoperative corneal topography values. Three-dimensional swept-source AS-OCT imaging seems to be a valuable tool for monitoring both the progression of the disease and postoperative effects in pterygium eyes.
Highlights
A pterygium is a degenerative lesion of the ocular conjunctiva characterized by the proliferation of fibrous-vascular tissue with its subsequent ingrowth into the cornea
The aim of this study was to investigate the influence of autologous conjunctival autografts combined with the use of human fibrin tissue glue on changes in corneal parameters as measured by 3-D swept-source anterior segment optical coherence tomography (AS-OCT) imaging
We evaluated the influence of pterygium removal accompanied by autologous conjunctival autografts and the use of human fibrin tissue glue on changes in corneal parameters, as measured by 3-D swept-source AS-OCT imaging
Summary
A pterygium is a degenerative lesion of the ocular conjunctiva characterized by the proliferation of fibrous-vascular tissue with its subsequent ingrowth into the cornea. The method of pterygium removal with autologous conjunctival transplantation plus the use of human fibrin tissue glue is one of the most innovative approaches, especially concerning low recurrence rate, reduced patient’s discomfort, and shortened recovery time after surgery. Both pterygium ingrowth and excision determine alterations in corneal topography. Assessment were performed before the surgery and 7 days, 1 month, and 6 months after pterygium excision Topographic parameters of both anterior and posterior surfaces of the cornea were analysed at each follow-up visit.
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