Men find women with larger eyes more attractive
According to several university studies, research has shown that men generally find larger eyes on women more attractive.
This perceived attractiveness of larger eyes has led to a growing trend (especially in Asia) of women using cosmetics and contact lenses with larger limbal rings in an attempt to create the illusion of larger eyes. Many have even done this permanently through cosmetic surgery.
According to the research, the reason for this attraction is that men think that larger eyes (along with fuller lips, bigger breasts and smaller chins) are a sign of higher levels of oestrogen. The men believe that women who have higher levels of oestrogen will be more successful and have an easier time conceiving than women with lower levels, hence make a better mate.
The men also think large eyes are a neotenous feature, which is a characteristic of youth shared by babies and children that humans evolved to retain so they could attract quality mates with "protective and nurturing impulses". A mate with protective and nurturing impulses is viewed as being more likely to help raise their offspring and raise reproductive success.
People who have large eyes are often perceived to be younger than they really are. Since perceived youth of a mate is also a sign of fertility, men tend to prefer women with neotenous features, like large eyes.