Retinol, a pure and active form of Vitamin A, works beneath the skin surface to promote plumper, healthier skin cells. It stimulates collagen production giving you the appearance of smoother, firmer skin. Microsponge® Technology Retinol is very effective against wrinkles, but the effectiveness depends on its integrity and purity. Perlabella Retinol Eye is encapsulated in a patented Microsponge® system, which provides a time-released delivery of Retinol into the skin. The very small microsponges are spherical so they slide off smooth skin and find their way inside wrinkles. Thanks to gradual product release, Microsponge® helps to increase the effectiveness and tolerability of the Retinol so it works well on all skin types.