Flying at night involves its own unique set of challenges. Generally, most pilots are poorly informed about night vision, if you learn how to use your eyes correctly and know their limitations, night vision can be improved significantly. In addition to night vision limitations, pilots should be aware that night illusions could cause confusion and concerns during night flying. Also, ensure that you are familiar with airplane and airport lighting and other aspects of night operations in all phases of flight.
PHAK Ch-17 (22) Night Vision
AFH Ch. 10 Night Operations
61.57 (b) Night takeoff and landing experience
RMH Ch-03 (06) Nighttime
Private Pilot ACS Page 61 Task A. Night Preparations