If you require vision correction, whether you currently wear plain contacts, or just glasses, or both, you have a prescription prescribed from an eye care professional. This is the same prescription you would use when ordering special effect contact lenses.
The confusion for those interested in getting a pair of those crazy Halloween contacts is when no vision correction is necessary. The wearer just wants to wear the contacts for effect. In this case, it can be confusing when you go to order contacts and a prescription is required. You may be thinking your eye sight is great, so what's with the prescription.
The deal with Halloween prescription contacts is that whether you require vision correction or not, contact lenses come in different sizes, and people have different sized eyes. What this means is that the contact lenses, regular or special effect, that fit your friend's eyes perfectly may just irritate your eyes. This is why a prescription is required. So you can get the right size contacts that will fit your eyes. This is the safest way to go about purchasing special effect contacts.
Another reason that companies will ask you for prescription verification when you order contacts, even though you don't need vision correction is because of what is called the Fairness To Contact Lenses Consumer Act. This Act, in the US, was enacted in February 2004, and requires that anytime an Eye Care Provider (EPC) conducts a contact lens fitting that they provide the patient with a paper copy of their prescription (whether or not they ask for it).
By obtaining this prescription when you are fitted for contact lenses, this allows the wearer to purchase contact lenses from anywhere, even quality cheap colored contacts for Halloween, not just the place where the contact lenses were fitted.
On the flip side, under this Act, it is a requirement for contact lens sellers to verify that patients in the US have had a contact lens fitting and that the prescription is not expired.
So even though you may be wanting Halloween contacts that come in non-prescription, in other words 'plano', with a power of 0.00, the wearer may still be required to have an eye exam and contact lens fitting from an eye care professional.
There you have it. The reason for Halloween prescription contacts explained when you, well, don't need a prescription 'cause your vision is just fine. At least you know when a company asks for your Halloween contact lens prescription, they care about your eye health!
Click Here for More FAQ on Contacts For Halloween