Judging from the ingredient list, "Jeju Island - Green tea eye cream" works well for improving skin hydration To work well, any moisturizer needs to include a combination of water-binding and emollient ingredients. Jeju Island - Green tea eye cream ticks this box. Panthenol, allantoin, fructose, glycerin and sodium hyaluronate in this product (humectants) attract water molecules to the upper layer of the skin (the water comes from the outside air or from the deeper layers of the skin if the air is dry). Ceramide np, phytosterols and peg/ppg-14/7 dimethyl ether in this product help decrease the water evoporation from the skin, so that it stays hydrated for longer. These ingredients also soften the skin and take away the feeling of tightness and dryness.

Ingredient callouts

As a plus, this moisturizer also contains Ceramides (ceramide np 0.30% - 0.50%). Ceramides are a type of lipids that our skin produces itself. They are a building block of the skin's barrier. Ceramides used in skincare are synthetic or extracted from plants. They work well for softening the skin surface and "patch holes" in the skin's barrier.
An effective concentration of Panthenol (pro-vitamin B5) - about 0.50% - 0.80%. Panthenol helps strengthen the skin barrier, improve hydration and reduce inflammation in skin.
In addition, this moisturizer contains Allantoin (1.20% - 1.50%). Allantoin is helpful in wound-healing and can help restore the skin barrier faster. It might also be able to improve scars, but the evidence is not very strong for this.

This product contains ingredients that could be beneficial, but their concentrations are too low in this formulation: bifida ferment lysate

Irritation risk

We assess the overall irritancy of this moisturizer to be high. For a detailed overview of all potential irritants: click here

You can see the detailed formula review with the breakdown of all actives in the product and the full ingredient list with estimated concentrations in the tables below.

Moisturizing

What does the product description say?

Select the essence of Jeju Island green tea, combine with the essence of Centella asiatica and Polygonum cuspidatum root, help to replenish the moisture needed for the skin, clean the pores, moisten and moisten, moisturize and brighten the skin, clean and refreshing the skin.

Source: N/A

This product can help improve hydration of the skin with the two types of ingredients.

The first type is called “humectants”:
these ingredients help attract water. When humectants are on the surface of the skin, they “pull in” the moisture from the outside environment, or from within deeper layers of the skin. The following ingredients in this product do the job: allantoin, fructose.

This product also contains ingredients called “occlusives”. They help reduce the speed with which our skin loses moisture to the outside environment. These ingredients also help soften the upper layer of the skin, so it feels less tight and nicer to the touch. The following ingredients in this product do the job: phytosterols, peg/ppg-14/7 dimethyl ether.

The following ingredients in this product are especially good for supporting the skin barrier and helping with the hydration level: ceramide np, panthenol

Panthenol0.5% - 0.8%