The short answer: For metal frames, bend the arm or bridge back a little at a time with your fingers, testing the fit as you go. For acetate frames, warm the bend for 20 to 30 seconds with a hair dryer until it flexes, adjust gently, then hold it while it cools. Never force a cold acetate frame, it snaps. Titanium and cracked frames should go to an optician.

First, find where it is bent

Put the glasses on a flat table, hinges open. A level frame sits evenly on both temple tips. If one arm lifts, that arm is bent. Now hold them up to a mirror and wear them: if the front tilts, the bridge or one arm is twisted. Knowing which part is off tells you where to make a small correction, rather than bending the whole frame.

Fixing a metal frame

Metal frames flex cold. Work in tiny movements, testing the fit after each one:

• Arm sits too wide or loose: gently bend the temple in near the hinge.
• Front tilts: bend the arm that lifts slightly downward so both sit level.
• Bent bridge: hold each lens rim and ease the bridge back toward symmetry, watching the two lenses line up.

Support the metal close to the bend so you are not stressing a solder joint or a nose pad arm. For arms that will not stay, see how to tighten loose glasses.

Fixing an acetate frame

Acetate (plastic) is brittle when cold and pliable when warm. Warm the bend area with a hair dryer on medium for 20 to 30 seconds, moving it so you do not scorch one spot. When the material gives slightly, ease it toward the right shape and hold it there for 20 seconds as it cools and sets. Repeat rather than forcing it in one go. See how to adjust acetate frames for the full method.

When to see an optician

Some jobs are not home fixes. Take the frame to an optician if it is titanium (memory metal that resists hand bending and springs back), if there is a crack or a loose lens, if the bend is at a hinge or solder joint, or if you have already tried once and it is not improving. Most opticians adjust frames in a few minutes, often free, and they would rather realign than replace a snapped arm.

From our test bench. The mistake we see most is speed. People bend a cold acetate arm to correct a small tilt and it cracks at the hinge. Heat first, always, and move in small steps with acetate. Metal forgives more, but even there, one big bend overshoots. Two or three small corrections, checked against a flat table each time, land the fit without stressing the frame.

FAQ

Can you bend glasses back into shape at home?

Yes, carefully. Metal frames flex cold in small movements. Acetate frames need warming with a hair dryer first, then gentle shaping as they cool. Titanium and cracked frames should go to an optician.

How do you fix bent plastic glasses?

Warm the bent area with a hair dryer on medium for 20 to 30 seconds until it flexes, ease it toward the right shape, then hold it for 20 seconds as it cools. Never force cold acetate, it snaps.

Will an optician fix bent glasses for free?

Many do, especially for frames bought there, and the adjustment usually takes a few minutes. It is the safest route for titanium, cracked frames, or bends at a hinge or joint.

Part of The Eyewear Care Manual · Related: tightening loose glasses · Shop eyewear accessories · Last updated: August 5, 2026