Never had any problems...but I do prefer my glasses at night as I find the strength of the runway lights can sometimes be too intense with contacts in...just a personal thing...
I have 75% water content soft lenses and with my glasses I have the 'anti reflective' coating that cuts down on internal reflection, a must for driving or flying at night I find.
[This message has been edited by Boss Raptor (edited 13 November 2000).]