I'm heading up to Derry tomorrow to see the consultant, hopefully will be getting a fitting for new lenses

A question - does anyone else find that they get extremely tired when wearing glasses? i don't know if its just me but my eyes just seem to want to close after i'm studying for a few hours, with lenses i'm ok.
I'm really not looking forward to tomorrow, usually i get to see the consultant in my local hospital but some top guy in the field wants to to see me (dunno if that is a good thing! lol!) something to do with the fact that there is a family history of KC and with me having it so advanced so young! I just want new lenses that don't pop out of my eyes and find their way to the corner of my bag!
Wish me Luck,
Emma