拍摄者 Pascal Chanel不飞溅

Tearing

Tears are needed to keep the eye’s front surface healthy and to maintain clear vision. It is
common to temporarily produce excess tears when you are emotional, laughing, coughing,
vomiting, experiencing strong taste sensations, or yawning.

Types of Tears

photo credit: allaboutvision.com

Different types of tearing consist of basal tears, emotional tears, and reflex tears. Basal tears are your basic functional tears. They are released in tiny amounts to lubricate your ocular surface and keep it clear of any dust. These are vital for good vision and comfort. Emotional tears are triggered by strong feelings such as joy or sadness. Reflex tears result from irritation in the eye by foreign bodies, or from the presence of irritant substances in the environment. They can also occur with bright lights hot or peppery stimuli to the tongue and mouth, when we yawn, cough or even vomit. These types of tears are released in larger amounts than basal tears. Their goal is to protect one’s eye.

How can I have Dry Eyes if my eyes are so watery?

The two common causes of watery eyes are blocked tears ducts and excessive production of tears. The common cause of excessive production of tears is dry eye syndrome. This occurs due to the glands around our lid margins not producing enough oil resulting the tears drying up very quick. This lack of lubrication results in our eyes producing an abundance of tears to compensate.

图片来源:Luis Galves @louiscesar

过敏性结膜炎或眼睛过敏发生在眼睛对刺激它们的事物产生反应时。当眼睛试图保护您的身体免受过敏原侵害时,它会触发肥大细胞释放组胺。结果,您的眼睛(通常是眼睑和结膜)变红、肿胀、流泪和发痒。您也可能在早上醒来时眼睛浮肿。眼睛过敏的人通常也有鼻过敏,这会导致鼻塞和打喷嚏。这两种情况都与季节性过敏密切相关。

眼睛过敏的症状是什么?

最常见的眼睛过敏症状包括:

  • 瘙痒和水样分泌物(泪眼)
  • 眼睑发红和浮肿
  • 对光敏感

如果它与季节性过敏有关,那么通常会涉及双眼。与粉红色的眼睛不同,眼睛过敏不会在人与人之间传播。

是什么导致眼睛过敏?

一些常见的过敏原包括:

  • 家庭灰尘
  • 树和草的花粉
  • 宠物皮屑
  • 模具
  • 抽烟
  • 化学气味,例如洗涤剂或香水

对香水、化妆品或药物的过敏反应也会导致眼睛产生过敏反应。有些人可能会对新的面部产品或眼药水产生急性过敏反应。

有时,眼睛会对不一定与眼睛直接接触的其他过敏原产生反应。这些可能包括特定食物或昆虫叮咬或叮咬。

大多数过敏性结膜炎可以通过口服或非处方抗组胺药、抗过敏滴眼液或类固醇滴眼液进行治疗。

然而,并不是所有的眼睛发红发痒都是过敏性结膜炎引起的。有些人可能认为他们有眼睛过敏,但实际上他们有眼睛干涩或其他类型的炎症。拜访您的眼保健提供者以获得针对您的问题的正确诊断和治疗对您来说很重要。