Night vision (Student question)

[Drnanjo]

Folks,

Are there any explanations for variations in the acuity of night vision from
person to person (other than owning night vision goggles)?  

A student  asked what the explanation would be, according to her, her brother
and husband see better in the dark than she does . I also wonder since this
is a subjective and ancedotal account, if night vision has been studied with
this in mind (finding out who might have better than average night vision and
what neuroanatomical or neurochemical conditions would make this so.)

Thanks for any help you can give me.


Nancy Melucci
Los Angeles Harbor College