There are some very important factors you should take care while buying prescription glasses either from high street or from online glasses store.
Rimless glasses are no doubt stylish and they come with a thing titanium frame with optical lenses but it is not recommended for people who wear prescription glasses all the time every day.
Titanium eyeglasses are light in weight and they are very expensive. Usually titanium glasses mean good quality but watch out for glasss frames made of nickel, as they could harmful to your skin. Frames with spring hinges indicate that they are of good quality.
Read the testimonials given on various websites, which are greatly helpful while buying titanium rimless glasses direct online.