I just bought Halloween contact lenses for Halloween. I want to know if I can use them after Halloween, is it possible to use them again? And if I can use them more than once, then for how long can I use them?
It depends on the types of contact lenses that which types of lenses you have purchased for Halloween. If they are one time uses lenses and can throw away then you can not but if they can be used again and again then you can wear it casually if the color of lenses is good to look.
As far haloween lens are considered they are meant to create a unique scary appearence to eyes i.e. blue or white coloured lens. They also made for temporary usage. you can use it only once upto 10-12 hours. Remove lenses after that period of time and rinse your eyes well with water. Do not reuse them as the material is very fragile meant for single use.
It is better to ask at the place you bought the lenns. But I agree that usually this kind of lens can be used not more than 12 hours. Also in case you start feeling discomfort while using them, it is better to remove them.