This question has been asked time and time again.
The easiest way I can explain it would be in a summary point by point so you can know what to ask for when you approach your doctor or any medical professional:
1) always have your optometrist test your eyes, even though it is not for corrective vision(sometimes it can be).
2) the reason for this is like the Color Contact Lenses comes out in various shades and sizes, so does your eye.
3) if you just go out and buy these Color Contact Lenses you might cause glaucoma which can lead to blindness and all this because the lens is the wrong size or shape.
4) Another reason to have it tested by an optician or optometrist, they will advise you on how to take care of the lenses, how to put it in and how long you can wear it.
5) An Optometrists can also advise you on where to go for a reputable supplier as even though you not wearing it for correcting your vision, and is only for cosmetics purposes, it is still a medical device, and like all medical devices, it must be manufactured, certified and handled in the most sterile environment.
6) Your medical professional can also tell you what colors or designs you can wear as these cosmetic lenses, unlike the actual corrective vision lenses, are dyed to get the effect wanted and this might cause your vision to be blurred if too dark.
7) So now you did all of the above and it is time to go and purchase your new pair. Because of the increase in demand for these lenses, there are a few optometrists and ophthalmologists that send the request to their manufacture company, and that is a big plus as you know it is going to be good and won’t harm you for that few hours.
8) once you receive your pair of lenses always take it directly to your eye doctor or if they are one that supplies it themselves, go to them to pick it up.
9) NEVER EVER USE A LENS IF THE PACKAGE IS SLIGHTLY OPEN OR THERE IS A TEAR OR CRACK IN THE SEALED BOX. THIS IS A BREEDING GROUND FOR GERMS AND CAN DAMAGE YOUR EYES.
!0) YOU SEE THE PACKAGE IS OK, STILL SEALED, AND YOU MEDICAL PROFESSIONAL CHECKED IT FOR ANY TEARS, AS THE SMALLEST OF TEAR IN THE LENS CAN DAMAGE YOUR EYE SO BADLY IT CAN MAKE YOU GO BLIND.
11) THE DOCTOR WILL THEN SHOW YOU HOW TO INSERT IT AND REMOVE IT AND DON’T FORGET NEVER GO SLEEP WITH IT ON.
So there you have it, 11 easy and simple steps to follow and you are ready to go have a night of fun.