I have talked about intraocular pressure and weightlifting extensively on this thread:
Note also that the ‘pressure’ feeling you’re experiencing might stem from orbital congestion rather than elevated IOP.
I would suggest getting a complete eye exam with an ophthalmologist (an eye MD), being sure to clue him/her in about your pressure sensation. Based on the exam, s/he should be able to stratify your glaucoma risk for you.