“…Sodium cromoglycate inhibits the release of histamine and other mediators of infiammation which occurs when antigen combines with sensitising antibody on mast cells (Foreman & Garland, 1976). In addition to its effectiveness in the treatment of asthma (Altounyan & Howell, 1969;Brompton Hospital/Medical Research Council Collaborative Trial, 1972), rhinitis (Salo, Backman & Holopainen, 1973;Morrison-Smith, 1971), proctitis (Heatley e/a/., 1975) and ulcerative colitis (Manie/a/., 1976), it has also been shown to be effective when applied topically to the conjunctiva in the treatment of vernal conjunctivitis (Rice & Jones, 1973;Tabbara & Arafat, 1977), and in seasonal allergic conjunctivitis (Oosterhuis, 1973;Kazdan et al, 1976).…”