Signs and symptoms include:
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Redness in one or both eyes
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Itchiness in one or both eyes
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A gritty feeling in one or both eyes
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A discharge in one or both eyes that forms a crust during the night that may prevent your eye or eyes from opening in the morning
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Tearing
When to see a doctor: There are serious eye conditions that can cause eye redness. These conditions may cause eye pain, a feeling that something is stuck in your eye (foreign body sensation), blurred vision, and light sensitivity. If you experience these symptoms, seek urgent care.