Question 6: Why do patients with NVG and a high IOP (e.g. IOP > 40 mmHg) not complain of pain?

Question 6: Why do patients with NVG and a high IOP (e.g. IOP > 40 mmHg) not complain of pain?

Answer:

Neovascularisation is a chronic process and it is likely that the obstruction of aqueous outflow that occurs in neovascular glaucoma can build up slowly over a long period of time. This slow increase in IOP may not cause discomfort or corneal oedema such as in acute angle closure. In some cases however, angle closure may occur rapidly and the symptoms as well as clinical findings may mimic acute angle closure.