怎么分辨是鼻眼反射还是户外过敏症？这很难确切地做出回答。
How do you know whether you're having a naso-ocular reflex or outdoor allergies?
该反射速度似乎有利于第一种理论，因为它发生的眼泪过于迅速生成并于鼻漏。
The speed of the reflex seems to favor the first theory, as it happens much too quickly for tears to be generated and drain into the nose.
另一个理论认为，把鼻子眼泪通过鼻泪管泄漏是一种光的反射引起喷嚏。
Another theory suggests that tears leaking into the nose through the nasolacrimal duct are a cause of the photic sneeze reflex.
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