Haemolacria refers to the presence of blood in the tears. Concentrations may be so low that it can only be detected with laboratory testing, or the patient may appear to be bleeding from the eyes due to the high blood content. It usually appears as a symptom of disease, although it can also develop spontaneously in some cases, particularly in fertile women. Research suggests that some women produce some blood in their tears in connection with the hormone cycle, and may be unaware of it because only traces are present.
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