Have you ever looked in a mirror and seen a startling red blotch in the whites of one or both eyes? What causes red eyes and when should you be worried?

Doctors tell The Straits Times that they most commonly treat red eyes caused by allergic or viral conjunctivitis. The resulting “pink eye” can last for weeks or months.

In the article, Dr Jean Chai, Senior Consultant Ophthalmologist at Eagle Eye Centre, explained that a subconjunctival haemorrhage may look alarming but usually resolves on its own within a couple of weeks and does not affect vision.

Dr Jay Siak, Senior Consultant Ophthalmologist at Eagle Eye Centre, advised seeking medical attention if red eyes are accompanied by severe pain, blurred or reduced vision, light sensitivity, headache or nausea.

As Dr Siak said: “Red eyes are common, but persistent redness, recurring symptoms or vision changes should not be brushed off. Sometimes the visible redness is only one part of the picture. A proper eye check can help identify whether it is minor, recurring or linked to something more serious." ...

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