
You have been wearing glasses for several years and your prescription is nearing its expiration date. Do you absolutely need to make an appointment with the ophthalmologist to purchase a new pair? In France, the answer depends on your situation: age, type of correction, and the age of the prescription. Here’s what the regulations actually allow.
Validity periods of an optical prescription according to age
Before discussing purchases without a prescription, it is important to understand a commonly misunderstood point: a glasses prescription does not expire after one year for everyone. The durations vary according to the age of the wearer at the time of the prescription.
- Under 16 years old: the prescription remains valid for one year. Vision changes quickly in children, hence the need for close monitoring.
- Between 16 and 42 years old: the validity extends to five years. This is the broadest age range, offering the most flexibility for renewing lenses.
- Over 42 years old: the duration decreases to three years, as presbyopia and other age-related changes justify more frequent check-ups.
As long as your prescription is still valid, your optician can provide you with new glasses. They can even adjust the correction if your vision has slightly changed, provided that the issue remains within the allowed framework (presbyopia, myopia, mild astigmatism).
To better understand the conditions for buying glasses in this context, it is also necessary to consider the notes made by the ophthalmologist on the prescription itself. Some practitioners may indicate a shorter validity period than the legal maximum, or explicitly prohibit adjustments by the optician.
Adjustment by the optician: what the LFSS 2023 has changed

Since decree n°2023-751 of August 10, 2023, implementing the 2023 Social Security financing law, opticians have been granted greater flexibility to adjust an existing prescription. In practice, this means that the duration during which an optician can slightly modify your correction has been extended for certain age groups.
This change reduces the frequency of mandatory visits to the ophthalmologist for a simple renewal. You can change lenses or frames in-store, with a still-valid prescription, without needing an immediate medical consultation.
One limit remains firm: if the ophthalmologist has noted a contraindication to the adjustment on the prescription, the optician cannot deviate from it. They will have to refer you to a new medical appointment.
Buying prescription glasses without any prescription: authorized cases and limits
You may have noticed online or in-store offers for “prescription-free” glasses? This type of sale exists, but it concerns a limited scope.
Pre-mounted reading glasses
Magnifying glasses sold in pharmacies or supermarkets do not require any prescription. They offer a standard near vision correction, identical for both eyes. They do not correct myopia, astigmatism, or a difference in correction between the two eyes.
For occasional use (reading a menu, checking a label), they are helpful. For prolonged wear, they can cause headaches or visual fatigue, as the correction is not personalized.
Frame only without corrective lenses
Buying a frame without corrective lenses is allowed. No prescription is required for the frame itself. You can then have your lenses fitted by an optician, provided you present a valid prescription for the corrective part.
Non-corrective sunglasses
Non-corrective sunglasses can be sold freely, both in stores and online. They fall under the regulations for protective equipment (CE standard), not the medical framework. Once corrective lenses are added, a prescription becomes necessary again.
Expired prescription and first pair of glasses: two distinct situations

If your prescription has expired, the optician can no longer provide you with corrective glasses. There is no exemption on this point. You will need to consult an ophthalmologist, or in some cases a qualified orthoptist, to obtain a new prescription.
For a first pair of glasses, an ophthalmologist’s prescription is mandatory. The optician cannot conduct an initial vision assessment and prescribe a correction. Their role is limited to adapting and renewing an existing prescription.
This point often causes confusion. Some brands offer vision assessments in-store, but these checks do not replace a complete ophthalmological examination. They only allow you to verify if the current correction remains suitable.
Reimbursement for glasses purchased without a new prescription
When the optician renews your glasses based on a still-valid prescription, reimbursement by Social Security and mutual insurance works normally. The condition: that the prescription is within legal time limits and that the optician has complied with the regulatory framework.
The 100% Health scheme allows access to optical equipment with no out-of-pocket costs. It also applies during a renewal by the optician, provided you choose a frame and lenses within the covered basket.
Pre-mounted reading glasses purchased without a prescription are not eligible for any reimbursement. Neither Social Security nor complementary health insurance covers them.
Buying glasses in France without going through the ophthalmologist remains possible within a specific framework: valid prescription with authorized adjustment, or non-corrective glasses. Outside of these situations, a medical prescription remains mandatory, both for visual health and for reimbursement.