If your mother often wear reading glasses, you must choose eyeglasses frames that extremely light in weight and strong and comfortable. So, we can't tell if metal or plastic eyeglasses frames are better. To give your mother comfortable wearing, titanium glasses frames, and memory plastic eyeglasses frames are recommended because they are durable and light weight as well as can give her comfortable wearing.
As far as I'm concerned, plastic eyeglass frames are better. The reason is that if you are going to wear glasses for a long time, the first thing you must consider is that the glasses must be light in weight so that they can make you feel comfortable. There are a wide range of colors as well as sizes for plastic eyeglasses.
And a kind of material called memory plastic that is bendable and very convenient and popular nowadays.
Besides, as for the color, black frames are universally flattering. If you are in favor of metal frames, a so-called shadow metal is a nice choice. Itâ€™s a thicker metal frame that wraps around the frame as well as the lenses, and looks like a plastic frame.