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To the Editor:
May I direct your attention to a report made to me by the late Dr. G. J. Lindsay Johnson that he had observed "cercariae" in the human eye? I could never understand this, but, in view of gradually increasing opacity of the lens of some patients infected with Schistosoma and some improvement in the sight of others placed under antimony therapy, there would appear to be some possibility of "cercariae," which circulate in the blood stream in great numbers, finding their way into the lens under certain conditions, though local opacities must not be confused with them.Antimony injections have not been used as much as they deserve to be in tropical diseases of the eye in which parasitic infection is often a contributory cause and sometimes severe keratitis and conjunctivitis which have proved resistant to arsenic and other injections rapidly respond to antimony injections, which may
Cawston FG. SCHISTOSOMES AND IMPAIRED SIGHT. JAMA. 1946;132(6):349. doi:10.1001/jama.1946.02870410037019