For the past 20 years (following 15 years as a military and photojournalist) I have been have worked as a rehabilitation counselor and supervisor with a speciality in blindness and brain injury. I concur that you get a good medical eye exam to rule out any of the above mentioned conditioned. It is very likely that at your age you will need reading glasses. I would take your camera to the drug store and check out different reading glasses to see which power (diopters) might work for you. (I assume that like in the US you can reading glasses with a prescription). You may need a different diopter when you are using the camera than for reading.