Accurate for optical shop optometry, accurate assembly glasses frames with accurate school three indispensable. For consumers choose the right lens, choose the right frame, carefully and with optometry school with also three indispensable. The selection of lenses to consider safety, lightweight, high transmittance, can absorb the harmful rays of the eyes, wear, chemical stability and practical Fake Oakleys Frogskins Sunglasses Cheap for Sale products. When selecting the frame is considered the most important in line with the frame IPD problem, followed by the appearance. Pupil in the horizontal position of the spectacles frame, the frame should be located near the geometric center. Located on the edge of the lower eyelid should be basically vertical center of the frame.
Select oversized frame defects, increased weight, causing discomfort. Best choice for children plastic frame, metal frame nose pads greater weight concentrated in the nasal area, affecting nasal development. Children frame PD is consistent with particular attention to the FPD, and pay attention to the timely replacement of frames based on growth and development. Optometry with the main aspects of the process of optometry, or try discomfort promptly informs the optometrist, in order to adjust, to find a more suitable degree. Frame schools should be equipped with the fitting division, promptly pointed to wear uncomfortable place. Frame the school with the best optical quality of the relationship with the glasses and the eye, is to get the right pair of glasses essential factor. School-age children have occurred lively, but self-protection awareness and ability than the poor, smashes the lens even when things hurt the eyes. When selecting lenses for children will be safe in the first place, children glasses to select the appropriate resin lenses.
Resin lens is impact resistance of Tiffany and Co Heart Necklace Jewelry Outlet glass lenses times or even higher, the lens is generally not broken, given the security features resin lenses in developed countries have laws to specify the product as a teen glasses. U.S. FDA provides that, unless specifically requested ophthalmologist outside, everyone should use resin lens glasses. Light weight resin lenses can reduce children's glasses oppression caused by nasal hyperplasia concerns. Comfort, and can reduce children's glasses reverse psychology. Resin lenses can absorb ultraviolet light, can block the harmful rays of wavelengths below 400nm, and can protect the eyes. Resin lenses can be used as a protective barrier of the eye. According to the Beijing Evening News reported: In the United States, schoolchildren taking part in sports events and cause eye injuries, up to 10 million cases per year, the American Academy of Ophthalmology and the Academy of Pediatrics joint appeal: imposition of children and adolescents to wear goggles made of resin material glasses participate in sports. Experts pointed out that if wearing goggles, above 90% of accidents can be avoided.
Progressive multifocal lenses are a top used to look too far to see near the bottom of the upper and lower degrees of different lenses. Fixing the lens far from the top to the bottom of the lens dipodic power of the near dipodic power is not fixed sudden change, but by gradual changes in the refractive power of the gradual transition between the two, compared with the conventional bifocal lenses or diphosgene with the following advantages. Like the appearance of a single lens optical lens, do not see the degree of change in boundaries. Not only looks beautiful, but more importantly is its protection of the privacy of the wearer age, do not have to worry about wearing Cheap Ray Bans Wayfarer 2140 Sunglasses Outlet glasses and because of the age of the secret leaked out. Because of the change is gradual lenses, will not produce like jump. Wear comfortable, easy to adapt. So it is easy to be accepted. Because the degree is gradual, an alternative to regulation is also based on a gradual shortening of close visual increase, there is no regulation fluctuations, and are unlikely to cause visual fatigue.