Yes, your eye doctor is legally required to give you your prescription. Federal law mandates that any time a prescriber measures your eyeglass or contact lens prescription, they must hand you a copy at no extra charge, whether you ask for it or not. This applies to optometrists and ophthalmologists alike, and you don’t need to buy glasses or contacts from them to get it.
Federal Law Requires Prescription Release
Two Federal Trade Commission rules protect your right to your prescription. The Eyeglass Rule requires your doctor to give you your eyeglass prescription immediately after the exam that measures it (called a refraction). The Contact Lens Rule requires release of your contact lens prescription once the fitting process is complete. In both cases, the prescription must be provided automatically. You should not have to ask.
Your doctor can charge for the eye exam itself, but they cannot charge a separate fee for the prescription copy. They also cannot hold your prescription hostage until you agree to buy lenses or frames from their office. If a doctor’s office tells you they won’t release your prescription unless you purchase from them, that violates federal law and you can file a complaint with the FTC.
There is one timing detail worth knowing: the office can require you to pay for the exam before handing over the prescription, but only if they require immediate payment from all patients. If you present insurance coverage, that counts as payment.
Eyeglass vs. Contact Lens Prescriptions
These are two separate prescriptions, and having one does not give you the other. An eyeglass prescription includes the lens power for each eye (labeled O.D. for your right eye and O.S. for your left), along with any correction for astigmatism and, for people over 40 who need reading help, an “add” power for bifocals or progressives. Some prescriptions also include prism correction for double vision.
A contact lens prescription includes all of that plus measurements specific to contacts: the base curve (how the lens fits the shape of your eye) and the lens diameter. It also specifies the brand name and material, because contacts sit directly on your cornea and different products fit differently. You cannot convert a glasses prescription into a contact lens prescription on your own. The powers may even differ slightly because glasses sit farther from your eyes than contacts do. If you want both, you’ll need both exams.
The Pupillary Distance Question
If you plan to order glasses online, you’ll need one measurement that may not be on your prescription: your pupillary distance (PD), which is the distance in millimeters between the centers of your pupils. Online retailers need this to position the optical center of each lens correctly. Federal law does not currently require doctors to include PD on the prescription, and some offices decline to provide it, particularly if they’d prefer you buy from them.
If your doctor won’t include it, you have options. Many online retailers walk you through measuring your own PD using a mirror and ruler or a smartphone app. The measurement is straightforward and doesn’t require specialized equipment.
How Long Your Prescription Stays Valid
Expiration dates vary significantly depending on where you live and whether the prescription is for glasses or contacts. Contact lens prescriptions have a federally mandated minimum validity of one year. Eyeglass prescriptions have no federal expiration rule, so states set their own terms.
The range is wide. Florida allows eyeglass prescriptions to remain valid for five years. California requires a minimum of two to four years unless there’s a medical reason for earlier re-examination. Michigan and Washington, D.C., set a minimum of one year. Some states leave expiration entirely up to the prescriber, and others have no rule at all. Check your state’s optometry board if you’re unsure. Once a prescription expires, you’ll need a new exam before any retailer, online or in-person, can fill it.
Using Your Prescription Elsewhere
Once you have your prescription in hand, you can take it anywhere: a different optical shop, a big-box retailer, or an online store. For glasses, you typically upload or enter the numbers from your prescription directly on the retailer’s website. For contacts, online sellers use a verification process where they contact your prescriber to confirm the prescription is valid. If the prescriber doesn’t respond within a set window, the order goes through.
You also have the right to access your full health records, including prescriptions, through your doctor’s patient portal if they have one. Under HIPAA, covered health care providers must give you access to your medical records in electronic form when you request it. If your office has a portal, your prescription may already be waiting there.
What to Do If Your Doctor Refuses
If an eye care provider refuses to release your prescription, charges an extra fee for it, or requires you to buy from them first, they are violating federal law. You can report them to the FTC online at ftc.gov or file a complaint with your state’s optometry or ophthalmology licensing board. Most offices comply without issue, but knowing your rights gives you leverage if you encounter pushback.