Evaluation of Meibomian Gland and Tear Film Changes in Patie
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Pterygium is a common disease of the ocular surface characterized by the invasion of fibrovascular tissue from the bulbar conjunctiva onto the cornea. The exact pathogenesis of the injury is complex and remains incompletely understood. Age, hereditary factors, sunlight, chronic inflammation, microtrauma, and heat are possible contributing factors.Kadayifçilar et al. and Ishioka et al. noted inadequate tear film stability in pterygium patients and suggested that abnormal tear function may be yet another risk factor related to pterygium development. However, several other studies have shown that tear function was normal in pterygia. Thus, there is an unresolved issue with regard to whether the abnormal tear function is directly associated with pterygium. If they are related, another question arises: does the change of the tear function cause pterygium or vice versa? To the best of our knowledge, this is the first time that meibomian gland changes have been measured in pterygium patients. The purpose of this study was to evaluate whether meibomian gland changes contribute to the ocular discomfort in pterygium patients and to investigate potential associated changes in ocular surface parameters.

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