Glitter eyeshadows are makeup products designed to add sparkle and dimension to eyelids, available in powder, cream, or stick forms. They offer vibrant, long-lasting, and smudge-proof finishes in various colors for different occasions. Products like OB Ocean Beauty's 24-shade palette and FOCALLURE's loose pigments provide high-intensity shimmer, though loose glitter may cause fallout and require primers for optimal adherence and to avoid irritation for sensitive eyes.