If you're having trouble recognizing changes in your vision, there are a few signs you should be aware of. These may not seem like they're the result of bad vision. But, they are good reasons to make an appointment with an eye doctor. Even if you don't see your vision changing, your brain notices the difference. As a result, it tries to work harder to fix the problem, but the longer it does this, the harder it works.
After a while, you get a headache. Other things can also cause headaches, so it can be difficult to recognize your vision as the root cause. Headaches brought on by bad vision tend to be in the front of your head or in the spots right above your eyebrows.
When your eyes work harder, they get tired. Of course, like with headaches, there are many other causes of eye fatigue. Things like allergies or tiredness should only affect your eyes for a few days at a time.
If your eye fatigue lasts longer than two or three days, it might be from an outdated prescription. A new contacts prescription will keep your eyes from straining and get rid of the fatigue. Squinting improves your focus and the clarity of your vision. These visits may delay the day you are issued your contact lens prescription past your exam date and push the expiration date accordingly. The following table summarizes and links to each state law where available , listing the state and the minimum as required by Federal or State law and maximum lengths as dictated by State law.
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Buy Contacts. How long is my prescription good for? Please note that not every state has a law that dictates how long a contact lens prescription is good for. Additionally, the specific wording in the law is also a determining factor in how long a prescription can be good for. Some states have minimum requirements, other states have maximum requirements.
Please note that the law specifically says your prescription is good for a minimum of one year from the day your first receive a written copy of the prescription, not the day you had your initial eye exam and contact lens fitting, even though these are often, but not always, the same day. Additional follow-up visits after the initial fitting, especially if you are wearing a lens for the first time, may be required to assure proper fit and comfort of the lens.
These visits may delay the day you are issued your contact lens prescription past your exam date and push the expiration date accordingly. The following table summarizes and links to each state law where available , listing the state and the minimum as required by Federal or State law and maximum lengths as dictated by State law.
State Min. An example of this is an eyeglass prescription written for a child whose nearsightedness is worsening year after year. Contact lens prescriptions also have an expiration date. Typically, the expiration date on a contact lens prescription is one year from the date of the exam when the prescription was written.
Contact lens prescriptions typically have a one-year expiration date because your eyes should be evaluated annually if you wear contact lenses to make sure your contacts aren't causing harm to the front surface of your eyes or putting you at risk of eye infections.
Do not try to purchase replacement eyeglasses or contact lenses online or elsewhere if your prescription has expired.
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