From the manufacturer

Caffeine Solution 5% + EGCG

What does Caffeine Solution 5% + EGCG Eye Serum do for the under-eye area?

The serum targets the appearance of puffiness and dark circles around the eyes. Caffeine visibly energizes the eye area, while epigallocatechin gallatyl glucoside (EGCG), a powerful antioxidant, protects and soothes the delicate skin around the eyes.
How often should I use Caffeine Solution 5% + EGCG Eye Serum?

The Caffeine Solution 5% + EGCG Eye Serum can be used daily as part of your AM and PM skincare routines. Apply a small amount to the eye contour area after cleansing and before moisturizing.
Can Caffeine Solution 5% + EGCG Eye Serum be used with other eye creams or treatments?

Yes. The Caffeine Solution 5% + EGCG Eye Serum can be layered under other formulations. When using multiple The Ordinary formulations, apply the Caffeine Solution after cleansers and toners and before the moisturizers and SPF.
How long does it take to see results with Caffeine Solution 5% + EGCG Eye Serum?

You may notice a reduction in puffiness within a few days of consistent use. For dark circles and overall improvement in the appearance of the eye area, it may take several weeks of regular application to see more noticeable results.