Every contact has an expiration date. Check the packaging of your contacts to see if they have an expiration date so you can avoid the complications that come with wearing expired contacts. Some are designed to last for one year, while others are meant to be worn for only two weeks or as little as one day.
One of the leading causes of eye infections is the use of expired contacts. Inflammation and reddening of the eye, moderate to severe pain, and partial or total loss of vision are all risks of wearing contact lenses past their expiration date.
To avoid irritation caused by old contacts, it is critical to replace your lenses on a regular basis. Even if you use proper contact lens hygiene, the lenses should be discarded and replaced on a regular basis, as directed by the lens manufacturer. Contact lens prescriptions, like contact lenses, have an expiration date.
The FDA passed a law requiring all contact lens prescriptions to expire after one year or as otherwise specified by state law, whichever is greater. Contact lenses and prescriptions have expiration dates to ensure that you are receiving appropriate medical products and that any complications associated with them are identified.
The conclusion is you are not allowed to wear an expired contact lens because it may give a lot of bad reaction than good. Take a good care of your eyes.