Photosynthetic Drops Soothe Dry Eyes With Sunlight The drops, tested on mice, healed eye damage using light-sensitive particles—sourced from ordinary spinach. Image Credit furkanvari on Unsplash Share The unassuming vial of eye drops could easily belong on a pharmacy shelf. But swirling inside are microscopic bits of photosynthetic machinery made from plants. Within minutes of giving the drops to ...