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Purpose: To evaluate changes in corneal sensitivity and subbasal nerve density after pterygium excision.
Methods: This prospective trial included 22 eyes with nasal primary pterygium and 18 controls. Corneal sensitivity was evaluated using a Cochet-Bonnet esthesiometer in the nasal, superior, temporal, inferior, and center quadrants of the cornea before surgery and 10 days, 1 month, and 3months after surgery. The central cornea was analyzed using confocal microscopy (IVCM) before surgery and 1 and 3 months after surgery. Subbasal nerve density and other nerve parameters were analyzed using NeuronJ. Nerve tortuosity was evaluated and graded in individual IVCM scans. The tear film break-up time (TBUT) test and Schirmer's test were performed before surgery, as well as 1 and 3 months after surgery. All the same tests were performed in the controls.
Results: All affected eyes showed a significant increase in corneal sensitivity in the nasal corneal quadrant after surgery when compared with preoperative data ( = 37.3; < 0.01). Compared with controls, pterygium patients demonstrated decreased corneal subbasal nerve density ( < 0.01). Compared with controls, pterygium patients demonstrated decreased corneal subbasal nerve density ( < 0.01). Compared with controls, pterygium patients demonstrated decreased corneal subbasal nerve density ( < 0.01). Compared with controls, pterygium patients demonstrated decreased corneal subbasal nerve density ( = 37.3; < 0.01). Compared with controls, pterygium patients demonstrated decreased corneal subbasal nerve density ( < 0.01). Compared with controls, pterygium patients demonstrated decreased corneal subbasal nerve density ( = 37.3; < 0.01). Compared with controls, pterygium patients demonstrated decreased corneal subbasal nerve density (.
Conclusion: Pterygium patients demonstrated deteriorated corneal subbasal nerve fibers when compared with healthy controls in terms of nerve length, nerve trunks, and nerve branches. Therefore, pterygium excision improves corneal sensitivity and increases corneal subbasal nerve density.
Download full-text PDF |
Source |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7057010 | PMC |
http://dx.doi.org/10.1155/2020/1349072 | DOI Listing |
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