The scramble for protective glasses has reached fever pitch across Europe ahead of Wednesday’s rare total solar eclipse, as pharmacies, opticians and other shops struggle to keep them in stock. In Spain, where parts of the country will be in the path of totality, finding certified protective glasses has become increasingly difficult, with many distribution points reporting they have run out. A notice posted at the entrance of Madrid’s National Museum of Natural Sciences said its supply of protective glasses was exhausted. Doctors warn that looking directly at the Sun during a solar eclipse can damage the retina, potentially harming the cells responsible for sharp central vision. With a seeming majority of opticians and pharmacists out of stock, pastry chef Arno Dossogne, 37, struck gold at a small opticians’ store that received a last-minute shipment Monday afternoon.