I did some research and found out that the reason why these circle lenses makes your eyes look bigger is because the diameter of these are slightly bigger than regular lenses. The increase in size comes from the extra outer dark rim of the lens, which gives the illusion of bigger pupils and makes your eyes seem larger.
Pros:
1. illusion of bigger eyes
2. contacts will stay in place; they won't move around when you blink because the outer dark rim holds it in place.
*another pro of these lenses, that has nothing to do with the outer rim, is that even if you buy colored ones, you won't see the world in color like how many other color contacts do.
Cons:
1. The extra outer rim (not found in regular lenses) restricts oxygen to your eyes; that's why it is not recommended to wear these for more than 6 hours.
I collected these information from people who had used these lenses and from some websites.
I'm just letting you guys know what you're doing to your eyes when you're using this product.
not here to preach, but I think it's safer not to wear these all the time, since they restrict oxygen...
It may cause problems for your eyes in the future you know...