Under-eye patches are small, often gel-like strips designed to be placed under the eyes. They are typically infused with ingredients like hyaluronic acid, collagen, or vitamin C to help hydrate, brighten, and reduce the appearance of dark circles and puffiness. These patches are usually left on for a specific duration, allowing the skin to absorb the beneficial ingredients. Many people use under-eye patches as part of their skincare routine, especially before special events or when feeling fatigued. They are easy to apply and can provide a quick refresh to the delicate skin around the eyes, making them a popular choice for self-care.