Description and Symptoms
Red eye is a common symptom and has many different causes. A detailed history and examination are required to determine the cause.
It is important to note whether the redness is all around the white of the eye. It can suggest conditions such as blepharitis, dry eye, thyroid dysfunction. These can associate red eye, allergic conjunctivitis or infection.
If the redness affects a sector of the eye, it is more likely to be episcleritis. It can appear like an inkblot- subconjunctival haemorrhage.