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Hi, thank you for getting in touch, I'm sorry to hear about mum's eyesight. Treatment for glaucoma is usually with eyedrops, they would include prostagalandin drops such as Xalatan (latanoprost), beta blocker drops such as timolol or carbonic anhydrase inhibitors such as pilocarpine. They are specialist drugs so prescription only. Having said that 12-22mmHg is considered the normal range for occular pressure so I would suggest that whatever treatment she is on is actually doing the job correctly. Did the optician give a reason for the ongoing blurry vision as I'm not convinced it's due to the glaucoma if pressures are actually in control.
There are other options such as laser therapy, drainage tubes or minimally invasive glaucoma surgery too. If her vision is still so impaired despite normal pressures I would strongly argue that she ought to see an ophthalmologist again for review.
You're so welcome Sandra, I sincerely ***** *****'s vision improves soon. If you could leave a positive review I'd be really grateful. Wishing you and mum the very best :)
much appreciated, thank you.