i failed a field vision test twice

hi hope you can help me,i did ask a question before about failing a field vision test twice,thankyou for your reply,im writing againto say i found a online field test,whee you folow the dot,i passed 100 per cent on both eyes,but was allowed to wear my glasses which helped greatly,arethese tests reliable?i was calmer mor relaxed and could see more clearly as had glasses onwhy cant you wear glasses at opticians?im very shortsighted -7 and -8and couldt focus on the dot as went blurry after a short while,my eyes flicker and lose concentration,im waitin for a referal to eye specialist as failed vision test twice,but eyes were healthy,pressure normal rangejust needed a change of prescriptionoptician only did field test as my mum suffers glaucoma.just want to ask if an online field test is reliable or give me some reassurance please.thankyou.

[Ray T Oyakawa, MD]

A central visual field test for glaucoma needs to be done with you distance prescription adjusted for your age.

I don't know about online visual field tests.

Dr. O.