Many people are not aware that you can buy contact lenses for fun. Most people are experienced with contact lenses being only for people who have a problem with their vision. However, more and more people are buying colored contacts for cosmetic reasons. They may want to change the color of their eye so that it looks natural or for novelty of reasons. Even if you are buying contacts for a Halloween costume and you only need to wear them one time, you might be surprised they you'll need to get a prescription. Any reputable company will ask you for a prescription before you order them online.
However, don't be confused. This does not mean that you will get a prescription for contact lenses that will change the way you see. It is simply for the measurements of your eyes. Having the right fit for your contacts is what you will need to make them effective. There are a number of problems that you can encounter if you do not buy the correct size. You also need to plan ahead if you plan on using them. For example, if you have a Halloween party a month away, you will need to order them at least a couple of weeks beforehand. You also need to get your prescription before that. To be on the safe side and to make sure they do not run out, you might want to order a couple of months in advance for a time like Halloween.
Getting the right fit is the key for any kind of contacts. For example, grey contacts are not novelty contacts. They are for making your eyes seem natural. However, if you order contacts in this color that are too large, you have a very unnatural looking ring around your eyes. If you order the contacts and they don't have a large enough space for your iris, you wind up not having any peripheral vision. This means that you can drive a car or see anything to the side of your head. Believe it or not, this can cause you to get into accidents and hurt yourself. No one wants a broken arm or leg over some silly contacts that were not fitted properly.
If you are looking for something more extreme, you may be looking for white colored contacts. These are typically for Halloween. However, some people have purposes for them that are outside of the Halloween time of year. For example, you may want to use them for a theatrical production. You may also want them for a job in a nightclub. These days, there are a number of opportunities to get dressed up. As I guess you have a prescription for the fitting, there are a variety of natural and supernatural looks to choose from with colored contacts.