Evaluating the Correlation Between Pterygium SLIT2 Grading System and OCULUS Keratography
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Abstract
Background: To evaluate ocular surface parameters using the OCULUS K5 Keratograph in unilateral pterygium eyes and explore SLIT2 grading's correlation.
Method: A prospective study involved 67 participants with unilateral primary nasal pterygium. Primary objective is to compare the ocular surface parameters measured by the OCULAR K5 Keratograph in the pterygium eye and its contralateral non-pterygium eye. Our secondary objective is to find the correlation between SLIT2 grading to the ocular surface parameters measured by the OCULAR K5 Keratograph in the pterygium eye.
Results: Comparing pterygium and its contralateral non-pterygium eye, our finding reported a decreased TBUT (6.76 ± 4.87 and 8.66 ± 5.13 seconds, p = 0.001) and elevated bulbar redness (1.98 ± 0.56 and 1.42 ± 0.44, p < 0.0011). High-grade SLIT2 pterygium injection was found to be related with shorter TBUT (low grade TBUT 5.05±0.70seconds, high grade TBUT 4.44±3.38, p = 0.035). SLIT2 grading also exhibited significant correlations with bulbar redness, except for Stalker's line.
Conclusion: Pterygium eyes displayed reduced TBUT and increased bulbar redness. High-grade pterygium body injections associated with shorter TBUT. Bulbar redness showed significant differences in SLIT2 grading, excluding Stalker's line. No significant variations were observed in tear meniscus height and meibomian gland dysfunction grading.
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