The short answer: A backup pair means you are never stranded when your main glasses break, go missing, or sit at the optician for repair. A good spare carries your current prescription, fits well enough to wear all day, and lives somewhere you can reach it. Many people make their old pair or a pair of prescription sunglasses the backup.

Why a spare matters

If you depend on glasses, one pair is a single point of failure. A snapped hinge, a lost frame, or a scratch across the lens can leave you unable to drive or work until a replacement arrives, which can take days. A backup removes that risk for the cost of a second, often inexpensive, pair. It is the same logic as a spare key.

What makes a good backup

• Your current prescription. An old, weaker prescription strains your eyes; keep the spare up to date.
• A real, wearable fit. It should fit well enough to wear for a full day, not just in an emergency.
• Durable and simple. A sturdy frame and impact-resistant lenses survive being tossed in a bag or drawer.
• Somewhere reachable. A desk drawer, the car, or a travel bag, not buried at the back of a closet.

Smart second-pair ideas

Your backup can do double duty. Prescription sunglasses work as a spare for bright days and a full backup in a pinch. A pair with a different frame style gives you variety and insurance at once. Keeping last year's pair, if the prescription is close, is the cheapest option. An affordable second frame is the easiest way in; browse the sale for a low-cost spare.

Store it right

A backup is only useful if it survives storage. Keep it in a hard case so it does not get crushed or scratched in a drawer or car, and away from a hot dashboard that warps frames. Our guides on hard vs soft cases and how to store eyewear cover it.

From our test bench. The people who never think about a spare are the ones who end up driving to the optician half-blind after a hinge snaps. A backup pair with the current prescription, kept in a hard case in the car or a bag, turns a bad day into a minor one. It is the cheapest insurance in eyewear.

FAQ

Should I have a backup pair of glasses?

If you rely on glasses daily, yes. A spare keeps you covered when your main pair breaks, gets lost, or is at the shop for repair, for the cost of a second, often inexpensive, pair.

What makes a good backup pair?

Your current prescription, a fit good enough to wear all day, a durable frame with impact-resistant lenses, and a storage spot you can actually reach.

Can prescription sunglasses be my backup glasses?

Yes. They double as a spare for bright days and a full backup in a pinch, as long as they carry your current prescription.

Part of The Eyewear Care Manual · Related: hard vs soft glasses case · Browse the sale · Last updated: August 5, 2026