In dogs it is most commonly caused by mechanical irritation (such as by entropion, ectropion, or trichiasis), allergies, and keratoconjunctivitis sicca.

 
  • 在犬种,常见起因是机械刺激(例如睑内翻、外翻或倒睫)、过敏和干燥性角结膜炎。
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