about 4 hours The product does only last about 4 hours but I have used the wet finger when I am out and it renews the effect a little. Enough that I do not have the really large bags. I actually have double bags under one eye.

Unlike other creams and treatments, Sudden Change works in 3 minutes and lasts for hours! Our formula is lightweight and can be worn alone or under foundation for a flawless complexion.

The Sudden Change® Under-Eye Firming Serum utilizes an innovative technology that creates an invisible microlayer to smooth, lift and protect the delicate skin around the eyes. As the satiny serum dries and absorbs, the microlayer shrinks and contracts, lifting and refining the eye area.

Using fingertip, smooth on from inner to outer corner of under-eye area. Once applied, you must keep face still. Do not frown or smile until completely dry (in 3 minutes). You will feel a tightening effect, which means the product is working.

Eye Cream: A single 15 ml tube if used once a day daily should last approximately 2.5 months. 7. Moisturiser: If you have applied a serum before, the skin has already absorbed one layer of product and received some hydration, this will help to prolong your moisturiser from running out.

* With continued use, it helps diminish the appearance of age-related concerns, like under-eye wrinkles and dark circles, and helps visibly restore the eye's youthful shape. You can apply this eye serum morning and night as part of your anti-aging skincare routine for smoother, younger-looking eyes.

Sudden Change Under-Eye Firming Serum works on unsightly wrinkles and bags that can form under your eyes. The Under Eye Serum, 0.23 oz, can be used with or without your foundation to lift, tighten and smooth out under-eye problems.

Once the firming serum is on, you can't move until it's dry and once it's dry, you can't put anything over it. If you don't wear make-up and you want some under-eye tightening, you might like this.

In about four weeks with consistent use of a product that works for your skin, you can start to see visible changes around your eye area. The look of dark circles will fade away and so will the appearance of puffiness.

You have to be consistent and give it minimum 3-5 weeks to show results. But if it's not living up to its claims despite your commitment, you need to switch to a different product or seek an expert's advice.

The general recommendation is to use a half pump of cream or serum. If your eye cream comes in a jar, use roughly a pea-sized amount for both eyes. It may not look enough like it's enough, but eye products are usually very concentrated and hydrating.

This means if you're using a 30ml bottle of serum you will get 150 pumps. If you use 1 pump from two of your favourite serums twice a day your serums will last you about 75 days. It is necessary that you use 1.25ml or ¼ of a tsp for just the face when applying SPF if you want to be fully protected.