Evaluating the Correlation between Pterygium SLIT2 Grading System and OCULUS Keratography
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Abstract
Background: Pterygium is known to contribute to ocular discomfort and dry eye symptoms. Traditionally, its measurement has been subjective and descriptive, relying on the attending physician’s assessment. The OCULUS K5M Keratograph offers an objective measurement, reducing bias and yielding more reproducible and reliable results. This study aims to evaluate ocular surface parameters using the OCULUS K5 Keratograph in eyes affected by unilateral pterygium and to explore the correlation with SLIT2 grading.
Method: A prospective study involved 67 participants with unilateral primary nasal pterygium. Ocular surface parameters were obtained using the OCULUS K5 keratograph and compared between unilateral pterygium eyes and their respective normal eyes. The relationship between SLIT2 pterygium grading and Keratograph parameters was also investigated.
Results: Pterygium eyes showed decreased tear break up time (TBUT) (6.76 ± 4.87 vs. 8.66 ± 5.13 seconds, p = 0.001) and increased bulbar redness (1.98 ± 0.56 vs. 1.42 ± 0.44, p < 0.0011) compared to non-pterygium eyes. High-grade SLIT2 pterygium injection was associated with shorter TBUT (low grade TBUT 5.05 ± 0.70 seconds, high grade TBUT 4.44 ± 3.38, p = 0.035). SLIT2 grading correlated significantly with bulbar redness, except for Stalker’s line.
Conclusion: Pterygium eyes displayed reduced TBUT and increased bulbar redness. High-grade pterygium was 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.
Conflicts of interest: none
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