glaucoma can be ruled out by IOP testing and fundus exam. since you have cosulted many ophthalmologist, so it's likely that they must have done it.I can give my opinion on the basis of their prescriptions. ,so please share
as far as you problem is concerned it seems to be computer related.and is called computer vision syndrome. as I advised please use.lubricant eye drops 2to3 times daily e.g. teardrop and rub ocupol dx eye oint twice daily on lids. take omega cap one daily
Next Steps
follow 20. 20.formula. ie close your eyes for 20 seconds after every 20 minutes. keep proper distance between eyes and screen. don't sit facing towards A.C.. wash your eyes frequently with fresh and clean water. eat lot of fresh fruits and leafy vegetables. .get regular eye checkup done.