Hi,
How are you? Are there other symptoms present? Open-angle glaucoma is an asymptomatic, progressive optic neuropathy that can lead to visual field loss. It is indeed important that you continue the prescribed medication. With regards to the headaches associated with reading or sewing, this could also be associated with exertion headaches which warrant further evaluation as well. Exertion headaches can be both associated with both passive and active exertions. Additional diagnostic tests may also be indicated to determine the diagnosis. Take care and do keep us posted.
open angle glaucoma is a disease where it internal ocular pressure (inside the eye) increase that is why while u concentrate on one thing the pressure increase much more and u have head ache bcoz the pressure on the optic nerve is to much. ur doc might have given u some drugs to relief glaucoma if not u need to consult ophthalmologist before the pain get worse and optic nerve suffer the incurable condition plz do keep me posted