800 degrees choose 1.71 plus blue light how much

800 degrees 1.71 with blue light is about 600 to 700. Specific needs to specific inquiries to the point, different have different prices. The purpose of wearing glasses is to protect the eyes and improve eyesight. If you wear poor quality glasses, not only can not protect the eyes to improve eyesight, but also bring bad effects that damage vision. This requires us to wear glasses, we must pay attention to wear the right glasses. The correct way to wear glasses is to pick and wear glasses with both hands, try not to throw glasses, do not put the lenses down, which will wear the lenses. Glasses do not dry wipe, wipe with a mirror cloth in one direction, do not wash glasses with warm water, take a bath as far as possible not to wear glasses, such a correct use of glasses, our glasses will last longer. At present, most of the commercially available glasses are resin lenses, which are lighter in quality and not easy to break, but easy to scratch. The frame mirror should be placed in the mirror box when not in use, the use of hard shell mirror box is better than the soft shell mirror box, not easy to crush, the mirror box is equipped with soft cloth, it is best to buy lightweight flannel from the glasses, when not in use, the soft cloth covers the lens is not easy to wear. When in use, water vapor, fingerprints, etc. should be wiped with soft cloth. It is best to have a small screwdriver for glasses and one or two spare screws in the mirror box, because the screws at the joint of the glasses are easy to loose and fall off, and a spare can be filled in time. If possible, the glasses can be cleaned regularly with ultrasound. If the glasses do not need to be placed on the table temporarily, do not contact the table with the lenses facing down. Folding glasses folding mirror legs should be left first and then right, do not leave and right for a while.