Video: Discoveries that changed the world | Medical glasses

<p style=";text-align:left;direction:ltr">Arab Weather - There are many uses for glasses between vision aids and protection, as safety glasses provide protection for the eyes from flying shrapnel or chemicals, and there are protective glasses from harmful rays and sunglasses, and medical glasses are based on lenses that work by refracting light, adjusting the size Pictures to become clearer to see</p><p style=";text-align:left;direction:ltr"> <a href="https://www.arabiaweather.com/ar/content/%D8%A7%D9%83%D8%AA%D8%B4%D8%A7%... details</a> </p><p style=";text-align:left;direction:ltr"><iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/k_vyqeKdIVg" title="YouTube video player" width="560"></iframe></p>