Dear user Hello Low pressure glaucoma also called as normal tension glaucoma is a clinical variant of glaucoma characterized by all the features of glaucoma but associated with intraocular pressure in the normal range. Low pressure glaucoma is usually a diagnosis of exclusion, where other causes resembling like glaucoma are excluded. Now with the availability of recent investigations like Retinal nerve fibre analysis by using OCT, HRT, GDx , now the prognosis of glaucoma can be told very easily depending on the results of the test. I suggest you to consult glaucoma specialist who can advise relevant investigations according to your case profile and diagnose or exclude low pressure glaucoma.