Face creams can be used in place of eye creams in some cases, but the results may be different. Face creams are usually designed for facial skin and may contain more moisturizing and nourishing ingredients suitable for use on the entire face, while eye creams are designed specifically for the sensitive skin around the eyes and usually contain more gentle and targeted ingredients, such as reducing eye bags, dark circles, fine lines and other problems.
The skin around the eyes is relatively thin and more sensitive, so eye creams are usually formulated with these factors in mind, using lighter, less irritating ingredients. Face creams may be thicker in texture or contain ingredients that may burden the sensitive skin around the eyes, such as fragrances or overly greasy ingredients.
In summary, if the skin around the eyes is not particularly sensitive and the texture of the face cream is not greasy or irritating, it is okay to occasionally use a face cream instead of an eye cream. But in the long run, using a dedicated eye cream will more specifically address eye problems, especially against fine lines, puffiness and dark circles.