It is not a question of wearing glasses at all, rather passing the medical and receiving the certificate, so the AME will decide if your visual accuity is sufficiant or not i.e. they are the ones who determine if you are medically fit to do the job according to the regulations. I do not think that Tanzania will be different to any other state operating under the recommendations of ICAO. The best is to just go through the examination itself and see.
