The Red Eye

Abstract
A red eye is the most common ocular disorder that primary care physicians encounter. Most cases are relatively benign. Some, however, herald a vision-threatening or even life-threatening disorder. A detailed description of the full differential diagnosis of a red eye is available elsewhere.1 This overview does not assume that the examiner has access to a slit lamp or has been trained to use it.Subconjunctival HemorrhageA subconjunctival hemorrhage (Figure 1) is often the cause of acute ocular redness. The diagnosis is based on simple observation of the characteristic features of such a hemorrhage: the redness, which is unilateral, is . . .