The tearduct
The tear duct, or nasolacrimal duct, is responsible for draining tears from the surface of the eye into the nasal cavity. Tears are produced by the lacrimal glands to keep the eye moist and remove irritants. Once tears accumulate in the eye, they flow into the tear ducts, helping to maintain proper eye health and comfort. This drainage system also contributes to the sensation of a runny nose when we cry.
Your eyelids function thousands of times a day, and with each blink, your eyelashes causes eddies of air currents that (usually) move dust particles away from contact with your eye. On occasion, dust particles (Or L.A. Smog) will contact your eyeball's surface, causing extreme discomfort and blurring of vision. The blurring is caused by the tear ducts. They are triggered when an irritant contacts the eyeball and flush out the irritant with tears. Without operational tear ducts, we'd all be perpetually blinded by ordinary wind-blown dust.
A cataract is the clouding of the lens. Crystallins are water-soluble structural proteins found in the lens of the eye; these are what are responsible for the transparency in the lens. These proteins are arranged in a precise way that keep the lens clear and let light pass through it. As we age, the proteins begin to clump together causing that part of the lens to cloud. Essentially it is the lens that is affected.
As a basic rule, you use the lightest colour on the inner corner of your eye where the tearduct is, and on the bone right under your eyebrow. The next lightest colour you put all over your eye lid. The next colour you put in your crease, which is the hollow of your eye right above your lid, right above your eyeball. That is pretty much a complete look, but if you want it to be more intense you take the darkest colour and put it on the very outer part of your lid and the very outer part of your crease. Or you could use it as eyeliner. You can also look up tutorials on youtube. Hope this helps!
Like a cheetah but smaller and cuter
It may do but it will destroy the delicate cells of the onion and a frozen onion would be difficult to cut, I suggest you refrigerate the onion to cool the fumes that make your eyes water, this causes them to move down toward the floor instead of up toward your eyes or my preferred method is to peel the onions in a bowl of cold water or under a running tap. It might make you cry.
I assume you mean a smoky eye look. In a nutshell, a smoky eye is one that is darker at the base of your upper lashline, and lighter in your crease. To explain this look, I will use a typical black and grey look to explain, but you can use any colour scheme, just use the same tones (dark or light). 1.) Use a primer. This is something like Urban Decay Primer Potion or Too Faced Shadow Insurance. NYX and L'Oreal have one too. Primers are used to keep your eyeshadow from creasing, something that is especially important with dark looks. Apply from the lash line all the way to the brow bone and under your eye. 2.) Use a dark base. You can just smudge something like an eyeliner all over your eyelid and blend it out well with your finger. This keeps the eyeshadow vibrant and gives it something more to stick to. 3.) Use a matte (no shimmer) brown only a little darker than your skin tone in the crease (the hollow of your eye above your lid) so that the colours blend seamlessly. 4.) Use the darkest (a black or charcoal) around your lashline, about halfway up your lid. As a basic rule, it should be thicker in the outer edge of your eye, and thinner nearer to the inner corner. Avoid dark colours in the inner corner of your eye. 5.) Take a midtoned colour (grey) and blend it on the upper part of the lid and into the crease, but don't let it go up very high. It shouldn't go higher than the brown colour used previously, but that colour should go pretty high anyway. 6.) Bring one or both eyeshadows on your lid on the lower lashline if you want. You don't have to do this, because it can be less flattering on some people. 7.) Use a very light, preferably shimmery, but not necessarily so, on your inner corner. Where the tearduct is. You can blend it a little bit into the inner lid/inner crease if it looks harsh. 8.) Use a matte colour a little lighter than your skin tone underneath your brown on the brow bone, and blend it down to fix any harsh lines. You can use it somewhat like an eraser. 9.) Important step. Take a dark liner, like black, and put in on the upper lashline. Before it sets, use a short stiff brush to blend/smudge it out. Once again, it should be thinner on the inner portion and thicker on the outer corner. You can blend this on the lower lashline too. 10.) You should but don't have to put a black eyeliner on your waterline. This is the flap of skin between your lower lashline and your eye. You can put it on your tightline, which is the top waterline, but it's a lot harder to do. Probably not worth it. 11.) Apply mascara. Whew. Sorry I'm so longwinded. *Most important step*. Make sure to try this at home in private before you wear it to go out, because you will probably mess it up. Also, test out the steps above to see what looks best on your eyeshapes, skin colour, eye colour, and age. You can also look up videos on youtube. There should really be a plethora of them. Hope this helps! Maybe too much!