Red eye
A red eye can be alarming, but is often just a sign of a minor eye condition, such as conjunctivitis or a burst blood vessel. If it's painful, there may be a more serious problem.
The most likely causes ofa painless red eyeare minorproblems such as conjunctivitis ora burst blood vessel. These conditionsdon't tend to affect your vision andnormally get better within a week or two
If your red eye is painful or you have other symptoms such asreduced vision, the cause is likely to be one of the below conditions. These conditions can sometimes be serious and could threaten your s