Trouble seeing in the dark

  I'm a 30 y/o male in relatively good health.  I have trouble seeing in my room at night.  You might say that maybe it's just too dark, but my wife has no problem.  I don't think it's night blindness because I can see outside.  Any suggestions.
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Tom,
Our retinas are very sensitive receptors of light which work over a very broad range of illumination from dim light to bright sunlight.  In bright light, our cones do most of the work and provide fine vision and color vison.  In the dark, the rods do most of the work.  Rods do not provide good color differentiation or fine clear vison.
In some cases people with decreased vision in the dark can have a problem with their cones.  
It is interesting that you only notice this problem in a dark room but not outside.  But still, your wife should not see that much better than you.  If there is a big difference, it is reasonable to see your ophthalmologist and have him evaluate your retina to make sure there is no sign of a rod problem.  
Some of these conditions can be hereditary.  It would be reasonable to see if your siblings or parents have any such problem
This information is provided for educational purposes only.  You should see your physician for diagnostic and treatment options.
Sincerely,
HFHS MD - NI