In a show in SBS(Seoul Broadcasting System) it was shown what the computer generated result of the average korean girl - in their 20s - looks like, based on several different faces of real women.
Here is the result.
Now compare this to the 3D beauty, of what koreans consider beautiful.
Its quite a difference here. Mostly it has to do with the eyes...
In the show the director of the Institute of the study of faces in Hannam University said " 68% of korean women do not have double eye lids, which is the highest percentage in the world"... when asked, then why one could see so many women with double eye lids on the street... he answered "well, that means that there are that many people who have had surgery done" source Hani jooltong.