Concept: Lance with glasses. He always wore contacts so no one knew. Maybe people used to call him 'four-eyes' so he doesn't feel as comfortable wearing them around other people like Pidge. Then one day his eyes really hurt or are dry from lack of sleep so he has to wear them. Queue everyone being like: 'Whaaaattt?? You have glasses?' Or 'Why do you have Pidge's glasses?' and poor Lance is just so uncomfortable.