First clean hands, and an clean place to handle all that about it. Like an table with a clean cloth covering the area that you gonna place the contact lens and all the things about it.
2nd if you gonna use the jelly ones the products that usually you gonna need, the solution to keep the lens that
1 - the solution that you keep the lens in the case,
2 - the cleaning solution, that you gonna use to clean the lens,
3 - The tears that, is like an eyedrop, but is one for those who is using contact lens.
This is one label very famous in my country.
3rd you need the case to hold when you aren't using, is optional the pincher and the plunger.
Is good you also use glasses if is that the case, sometimes you can't be using the contacts so is good had the glasses for that.
When you use makeup, when you put the lens after the makeup you can have some of makeup in the eye! and that be under the contact lens, is almost unbearable you pass a full party holding that bordering in the eye, imagine someone making your make up? The person don't gonna even notice some eye mascara in your eye! The pain is less when the residue is over the lens to under the lens.
So when you use lens because you use glasses, is good you carry the glasses you can need take of the lens!
Is good you have the eyedrop, because some dirty with the eyedrop is easilly take it out, unless is under the lens, also is good paper tissues to help with the eyedrop, take toillete paper is a little dirty. Also the eyedrop is good if you felt your eye dry.
So is good you carry with you the case for lens, because for any circumstance you can need take out the lens, or you can pass the day with a horrible pain the eye. So you gonna take out the lens and put in the case to don't lose your contact lens, imagine that you are driver and need glasses you are without your lens you gonna need the glasses to return home.
Also have to treat the lens the one step solution to you don't need buy the solution to keep and to wash but I preffer the two step cleaning process but this is personal.
Look that model with a lot of slots for many lens with color, is good specially if you like to change the colors of your eyes and you want do that in a travel very organize, in one place to don't loose, but you gonna have the one for one pair to carry in the purse or in the pocket.Rute Bezerra de Menezes Gondim