Side power, it will unless we move away too much from the text to read, which can lead to a slight distortion of the characters, but adequate distance is easy to find. When I gently shaken magnifying glass that I bought the glass moves as poorly glued or sealed. So to conclude and make short, if you really want to have a "good lens no default ", then go to an optician who will advise you in your purchase. It will certainly be much more expensive, but much higher quality!
