The "best" moisturizing eye cream is subjective and depends on your specific skin type, concerns, and sensitivities. However, a truly effective eye cream will contain humectants to draw moisture to the skin (like hyaluronic acid or glycerin), emollients to soften and smooth (like ceramides or shea butter), and occlusives to lock in hydration (like petrolatum or silicones). Consider your concerns: for dryness, focus on rich, occlusive formulas. For sensitivity, look for fragrance-free and hypoallergenic options. Always patch test new products before applying them fully. Remember, consistent use is key; even the best formula requires time to show results.

Applying petroleum jelly (like Vaseline) under your eyes before bed primarily acts as an occlusive. This means it creates a barrier that prevents moisture from escaping the skin. This can be particularly beneficial for those with very dry under-eye areas, as it helps to lock in hydration from any serums or moisturizers applied beforehand. However, Vaseline doesn’t add moisture; it simply prevents water loss. If you are using other products, apply these first, then follow with a thin layer of vaseline. Be cautious, as too much can feel heavy. Some individuals may find it clogs pores, so monitor your skin's reaction.

Hydrating your under eyes involves both internal and external strategies. Internally, drink plenty of water throughout the day to keep your skin hydrated from within. Externally, use a hydrating eye serum or cream with ingredients like hyaluronic acid, which draws moisture from the air into the skin. Apply these products while your skin is still slightly damp after cleansing for better absorption. Gentle tapping motions with your ring finger are best to avoid pulling on the delicate skin. Don't forget a broad-spectrum sunscreen during the day, as sun damage contributes to dryness. A humidifier, especially in dry climates, can also help maintain skin hydration.

The optimal under-eye moisturizer is one tailored to your specific needs. If your primary concern is dryness, opt for a richer cream containing emollients like shea butter or ceramides, alongside occlusives to seal in moisture. For those with puffiness, look for formulations with caffeine or peptides that can help constrict blood vessels and improve drainage. If you have sensitive skin, prioritize fragrance-free and hypoallergenic options to minimize irritation. Always apply the moisturizer gently, using your ring finger to lightly tap the product into the skin. Remember, a small amount goes a long way, and consistent daily use is essential for seeing results.