Look great day or night in these glow-in-the-dark square glasses. Made with lightweight and flexible TR90 plastic the large-sized frame has a soft pastel color in the light then glows bright neon in the dark. To optimize the glow effect we recommend putting your glasses under an LED light or exposing them to bright sunlight for 15 minutes before you wear them. | Zenni Square Prescription Glasses Purple TR Full Rim Frame