Two nights ago my right eye could not see that well in the dark but when i went to the bathroom and turned on the light, everything was fine. help?

Eye issues: If the eye is fine now both in the light and dark - I wouldn't worry about it - If the issue is continuing - you should see a doctor. in the dark - your pupil dilates to allow more light in - and in light - it constricts It may have been a transient issue with your pupil that has resolved good luck

Dark Adaptation?: Optimal dark adaptation, time for the peripheral retina rod light sensing cells, can take 30 to 60 minutes without light exposure. Thus if you your poor vision was due to inadequate time to dark adapt, this could be quite normal. The cone cells, dominant in the fovea centralis, the about 1.5 degree cone of sharp central vision, are best with higher light levels & are color sensitive.