Glasses are simple optical devices used to correct vision or protect eyes, which are composed of lenses and frames. /kloc-At the end of 0/3 century, Italy invented glasses. At that time, glasses could only be said to be magnifying glasses, and they were held in your hand when reading. A pair of glasses frame usually consists of lens ring, nose rest, pile head and lens foot, in addition to the above components, there are foot covers, hinge screws and so on.
At present, the lenses used are basically resin lenses, and the design of lenses is basically aspheric. The selected lens is an aspheric lens made of resin material. One characteristic of aspheric lenses is that the optical power of the optical center is higher than that of the periphery, that is to say, if the lens frame is too large and the pupil distance is too small, the machining center will be shifted more. Besides the thick edge, not only can the central dominant optical area not be effectively utilized, but the periphery will also interfere with the vision of the central area.
If the patient has blurred vision, he needs to go to the hospital for regular medical optometry. There are essential differences between medical optometry and optometrist optometry. Because optometrists have no medical qualification, they can only do routine optometry. The purpose is only to let ametropia patients see the object clearly, and the examination method and optometry equipment are relatively simple. Hospital optometry is medical optometry, which is relatively complicated and requires higher optometrists and optometry equipment.
To open a brand glasses franchise store, you should be familiar with the local market environment and consumer demand, and then choose a good glasses brand. First, you should choose a professional team to develop it, so that word of mouth and quality are guaranteed. Click to learn more about joining the project.