• A chemiluminescent material (Cyalume) was injected into the lacrimal excretory passages of eight normal monkeys (16 eyes). Patency was established by almost instantaneous observation of a yellowish-green glow in the nose and pharynx. No toxic effects of the chemical were noted in any of the monkeys.
Cohen SW, Sherman M, Schwartz GG, Banko W, Cohen HH, Mahl CF. Lacrimal Outflow Patency Demonstrated by Chemiluminescence. Arch Ophthalmol. 1980;98(1):126–127. doi:10.1001/archopht.1980.01020030128014
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