Dr. prescription eyeglasses , Most Topflight Sales for Love Sparrow, a Professor of Ophthalmology of Columbia University Medical Center, said most people should not wear Blue Sunglasses whether young or old. How to Protect the Gloss of eyeglasses ? Dr. Sparrow is studying that when the human eye is contacted with the sun’s blue rays, whether it’ll change the nature, which mainly causes a blindness elderly. She said: there will be more and more light-sensitive compounds in some retina cells with age. While the wavelength of Blu-ray in the spectrum can activate these compounds to an extreme and promote the release of harmful free radicals. Like the oxidative process that causes damages to retinal cells, it threatens eye health.
Blue-colored sunglasses are indeed harmful to the eyes. On the one hand, blue-ray has a short wavelength, in which the human eye may has the smallest field of view and watch things vaguely; On the other hand, blue light is the closest to the color of the ultraviolet radiation, and similarly, it is not good for optic nerve and will likely harm the eyes. Clinically, a number of optic nerve diseases have been confirmed in relation to the blue ray.
Besides blue lenses, the popular colorful contact lenses with blue strips on the market also do harm to eyes. So we should be care when choosing glasses. So, which color is safe when we are buying sunglasses? Professor Sparrow says that sunglasses of yellow or brown are the best choice. As the yellow light has an intermediate wavelength, the optic cell of human eyes will be most sensitive to it, so that the natural scenery can look clearer. Moreover, the yellow sunglasses can filter blue light, reduce the amount of blue light into the eyes, and effectively protect the eyes’ health. In addition to yellow or brown lenses, the black lens is also a good choice, because it can reduce the contact with all rays of various colors.
Finally, the professor reminds consumers that many mixed sunglasses on the market are not qualified. When choosing sunglasses, consider the UV prevention most and the anti-UV index is usually between 96% -98%; While, the color should not be too deep, because such lens will have a serious decline in light transmission, making eye pupil expand in the dark, so that eyes will be damaged eventually.
One thing I would like to note is the following:
Always be careful of imitation glasses especially the dark colored sunglasses as if you do not have correct uv protection, the darker color will force a larger pupil therefore endangering your eyes even more.