Bilateral oedema at the posterior pole. Hypersensitivity reaction to Alavac P injection.

Many diseases affecting the eyes are considered to be allergic manifestations (Cooke, 1947), but the retina and optic nerve are involved only rarely; retinitis, detachment of the retina, and optic neuritis may result (Tassmann, 1946). A contrary view is that retinal oedema was common during the era of serum therapy because of the high incidence of serum sickness. Foods, pollens, and drugs were also frequently incriminated (Boyd and Aaron, I963). In the following case, bilateral macular oedema occurred as a hypersensitivity reaction to densitizing pollen vaccine.