Females have larger eyes in proportion to the face and the eyes have a more open expression with the top lid lifted a little more than in the male. Female eyes also have a little more of a downwards slant from the outer corners to the inner corners - this is called a "canthal tilt".
There is no way to surgically enlarge the eyes but by reducing the brow bossing, the eyes may seem to come forwards and appear more prominent.
Eye-liner was invented to make your eyes look bigger! One tip is to not put eye-liner on the inside edge of the eyelid – this can make the eyes seem smaller (unless you already have big eyes) so put the eye-liner outside the eyelash line. You can emphasis this effect with a white eye-liner on the inside. Mascara also makes the eyes look bigger.
If your eyes are small or deep-set, try not to emphasise this with very dark eye-shadow – go for medium or pale shades.
One procedure that is often included as part of FFS is the blepharoplasty. This is more of a rejuvenating procedure than a feminising one but younger faces do tend to look a little more feminine than older ones. An upper blepharoplasty reduces the tissue above the eyelid - sometimes reducing loose skin, sometimes reducing a pocket of fat and sometimes both. It helps expose more of the upper eyelids. A lower blepharoplasty is for people who have bags under their eyes. It tightens the skin and reduces the fat pocket that may be causing the bags.
Occasionally people ask me if there is anything that can be done to reduce dark circles under the eyes but unfortunately there is no actual cure for them. They are usually inherited and can be made worse by being tired, stressed and dehydrated. Anaemia can also be a cause. So although you can not get rid of them surgically, You can sometimes reduce them somewhat by making sure you are not anaemic or dehydrated, getting plenty of exercise and plenty of sleep. The main way to deal with them is to conceal them with make-up.