Prescription contact lenses means that the lenses are designed to correct a problem with sight.  In other words, if you have perfect eyesight and you put in a prescription contact lenses, you will not be able to see properly.  Just like putting on someone else’s glasses.

Non-prescription contact lenses are the contact lens equivalent of  a clear piece of glass, that is, they are not designed to correct defective vision.

Colored contact lenses can be prescription or non-prescription, in the same way that it is possible to buy prescription sunglasses.

Buying colored contact lenses without prescription, whether they are prescription lenses or not, will raise the same problems as buying any contact lenses without a prescription.  Some countries will allow this and others will not.

Extreme caution is recommended if you are considering wearing colored contact lenses, especially non-prescription colored lenses.  Putting anything in your eye is risky and putting something in your eye when you really do not need to is leaving yourself open to the possibility of infection.

Extreme cleanliness is essential at all times when handling any contact lens.  Colored contact lenses contain dye and there is always the possibility of this dye leaking and coming into contact with your eye.  This is clearly not a good idea and you should ask yourself if it is really worth taking risks with your eyes for the sake of vanity or a bit of fun;  or whatever your reasons for wanting to wear colored contact lenses without prescription is.

Related posts:

1. Non Prescription Colored Lenses