I wear glasses and i'm not able to see my face as close as would probably be ideal for shaving. Would a magnified mirror allow me to see without me having to wear my glasses? If so, how do I know which magnification mirror I should have, I don't know if 2x, 3x, or 7x would be the right magnification that matches up with my prescription for my glasses so I can see. How would I figure that out?