How to Replace Ray-Ban Wayfarer RB2140 Lenses

I run an optical repair workshop in Granada, Spain. Every week, people walk in with perfectly good Ray-Ban Wayfarers and the first thing they say is "I think I need new glasses." They don't. Nine times out of ten, the frame is completely fine — it's just the lenses that are scratched or faded.

Replacing the lenses yourself on a Wayfarer takes about ten minutes and costs a fraction of buying a new pair. The RB2140 (the original Wayfarer) is one of the most forgiving frames to work on because it's solid acetate — thick, warm-able, and it doesn't require any screwdrivers.

This is what we do in the workshop, simplified for home use.

Tools:

1. Hair dryer or heat gun (low setting)
2. Lint-free microfiber cloth
3. Soft flat surface to work on (a folded towel works perfectly)

Parts:

Original Ray-Ban RB2140 replacement lenses

Open either temple arm and look at the stamp inside. You need two pieces of information: the model (RB2140) and the size (50 or 54).

If the stamp has worn off — which happens on older frames — measure the existing lens horizontally at its widest point. It'll be close to 50 or 54 mm. When in doubt, order 50 (it's the more common size).

Pro tip from the workshop: hold the temple arm up to a light source and tilt it at an angle. The engraving catches the light and becomes much easier to read even when it looks faded.

Before trying to remove the lens, you need to make the acetate pliable. Hold the frame 15–20 cm away from a hair dryer on LOW heat and move it slowly across the rim. Ten seconds is usually enough. The frame should feel warm to the touch — not hot.

Why this matters: cold acetate can crack if you force the lens. A little heat makes the rim flex just enough for the lens to come out cleanly. If you're somewhere cold, give it a few extra seconds.

Don’t use: boiling water, a heat gun on high, or a lighter. Acetate melts and loses its polish at relatively low temperatures.

Work on your folded towel. Hold the frame with both thumbs on the BACK face of the lens and your fingers supporting the outer rim. Push forward with steady, even pressure.

The lens pops out with a satisfying click. If it resists, don't force it — go back to the hair dryer for ten more seconds. Repeat until it comes out cleanly.

Do both lenses before moving on. Set them aside on the microfiber cloth.

With both lenses out, look inside the rim at the channel where the lens sits. Wipe it clean with a dry corner of your microfiber cloth. Any dust or old coating residue in this groove will stop the new lens seating evenly.

Also check for stress cracks in the acetate — especially around the nose bridge and near the hinges. Hairline cracks are common on older Wayfarers. If you see them, be extra gentle from here on.

Hold the new lens against the front of the rim. The lens has a slight curve — convex side faces outward (away from your eye). Start at the nose bridge edge and press that section into the groove first, then work your way around the perimeter.

You’ll feel each part of the lens click into the groove as you go. Take your time. This is how lenses crack — people rush and force it in the wrong spot.

If the acetate feels stiff anywhere, hit that section with the hair dryer for five seconds and press again.Once the lens looks seated, press firmly all the way around the rim — front AND back — with your thumb. This step is more important than it looks.

The lens should be completely flush with the acetate rim on both sides. No gaps, no wobble, no edge sticking up. Look at it from the front, side, and back. If any section looks slightly raised, it isn’t fully seated. Apply more pressure there specifically.

A lens that’s 95% seated will fall out the first time you put the glasses on your face. This is worth doing properly.

Put them on and look around. The tint should be even across both lenses, vision clear, no distortion near the edges.

If a lens pops back out, the size is wrong or it isn’t fully seated. Go back to Step 5.

Original Ray-Ban lenses have the Ray-Ban logo etched on the right lens and “RB” laser-etched on the left — both confirm you have genuine lenses.

Total time: under ten minutes once you know what you’re doing. Total cost: the price of two replacement lenses. If you need original Ray-Ban replacement lenses for the RB2140 or any other Wayfarer model, we ship worldwide with free delivery from our optical workshop in Granada at ReplacementLenses.net.