I once found an old-style glass case covered with dust where preserved a pair of eyeglasses on the innermost layer of a drawer at home. Though the eyeglasses were obviously out of date, I could impute its value otherwise the owner—my father was unlikely to keep it for such a long time. When my father was 18, he passed the college entrance examination with a high score and got a pair of eyeglasses as a gift. The eyeglass cost my grandfather one month’s salary at that time and took him a great deal of time to select. Nowadays, the information highway offers us unprecedented convenience to get what we need easily. The online commerce also gives a brilliant platform for prescription glasses industry to flourish. (more prescription sunglasses…)