I am planning to buy a new pair of prescription eyeglasses, and I need titanium frame, as it is durable, light and corrosion-resistant, my last pair was damaged by my naughty nephew, but I just have a question of the position of the glasses on my face before the optician begin my eyewear, I get used to wear eyeglasses at top of nose, did I put down the right position? What does it mean wearing it almost touching the forehead?