Two before about millenniums, Roman Empire has a named warm numerous tyrant, he is very flagitious, likes taking the slaves specially to massacre happily mutually in the abattoir. But his look is not good, sits cannot see clearly these fierce and brutal cruel scenes on the stand. He orders the artisan to rub one for him to be possible to look at the clear distant place the eyeglasses. Has the clever artisan with the emerald for his produce by rubbing piece of concave lens piece, although rough somewhat, draw close to it the eye, looked that the distant place the thing clearly were actually many. This Roman emperor special-purpose monocle, must be eyeglasses for myopia’s ancestor. Afterward, in our country and the foreign country, one after another presented the eyeglasses for myopia which and the eyeglasses for farsightedness grindes with the mineral crystal. British scholar He Kang, once specially had composed the related crystal eyeglasses’ work in the mid-13th century, the explanation in the past the very long time was the use mineral crystal grinding lens. Then, who has invented the glass eyeglasses? The inventor has not kept theirs name the world. At present, we knew that sells eyeglasses’ place is most early Italy’s Venice, the time is probably 600-700 years ago. At that time, although the glass price is not high, but because very scarce, a glass eyeglasses value daughter, can only for the minority nobility, the bureaucrat rich merchants to enjoy. That time eyeglasses not put up on the bridge of the nose. Some eyeglasses More...