[Lacrimal system trauma].

Among lacrimal system injuries, canalicular lacerations are at the top of the list. Men are more affected than women, but children are most likely to experience such trauma. The cause depends on the patient's age: in young children, there is a higher prevalence of animal bites (dogs and cats); in young adults, fights predominate, since motor vehicle accidents have become less common; in the elderly, falls are among the most frequent causes. Tetanus vaccination is required in all cases, but assessment for rabies exposure is necessary in the case of dog or cat bites. Diagnosis is very simple: it is based on examination or wound probing. Other head, facial, or ocular injuries must be excluded; for example, an injury to the globe must take precedence over a canalicular laceration. In the absence of an ocular injury, the canalicular wound should be managed surgically within 48hours under an operating microscope: identification of both severed ends of the injured canaliculus, suture of the severed canaliculus with monofilament suture, and appropriate lacrimal intubation if indicated. Other trauma to the lacrimal system, such as sharp or blunt trauma to the lacrimal sac or nasolacrimal duct, are much rarer.