The red eye. Why it happens, what to do, when to refer

The ability to differentiate the various causes of ocular hyperemia is important in primary care. Symptoms such as pain, photophobia, and significant blurring of vision usually signify a more serious ocular condition or even a serious systemic disease. The majority of cases can be managed by the primary care physician, but the more serious causes of a red eye deserve prompt recognition and referral to an ophthalmologist to ensure appropriate management.