Original Ray-Ban 4278 Replacement Lenses

Original Ray-Ban RB4278 replacement lenses

If your Ray-Ban RB4278 frame still fits perfectly but the lenses are scratched, replacing only the lenses is the smart way to bring them back to life. These original Ray-Ban replacement lenses keep the correct fit, look and sun protection, with free shipping and savings of up to 60% compared with buying a new pair of sunglasses.

Compatibility with the model

These lenses are made for the Ray-Ban RB4278 model in size 51. The lens shape is square and the lens curve is Base 6, so they should only be fitted into a compatible RB4278 frame in that size. Replica frames or similar-looking Ray-Ban models may have different grooves, thicknesses or curves, and should not be forced.

How to identify your model and size

Look inside the temple of your sunglasses. You should find the model reference RB4278 and the size 51. The model code confirms the frame design, while the size confirms the lens calibre. Your old lens colour does not need to be the same: you can choose any available lens option for the RB4278 and refresh the look of your sunglasses.

Main features

• Brand: Ray-Ban.
• Compatible model: RB4278.
• Size: 51.
• Listed diameter: 57 mm.
• Lens material: polycarbonate.
• Shape: square.
• Lens curve: Base 6.
• Use: adult sunglasses.
• Product type: original.
• UV400 protection: blocks 100% UVA/UVB rays.

Available colours

• 13 - Brown gradient - plastic.
• 71 - Green - plastic.
• 9A - Green polarized - plastic.
• 11 - Grey gradient - plastic.

The 9A option is the polarized lens option for this model, ideal if you want to reduce glare from roads, water or bright horizontal surfaces.

Material, protection and lens finishes

Ray-Ban RB4278 replacement lenses are made from polycarbonate, a lightweight and resistant material for everyday sun use. All options provide UV400 protection. Gradient lens options offer a softer lower area for a comfortable visual transition, while the polarized lens option improves visual comfort by cutting disturbing glare.

Why replace only the lenses

Your RB4278 frame may have years of use left. Replacing only the lenses avoids throwing away a complete pair of sunglasses, reduces waste and lets you keep the frame that already fits your face. At ReplacementLenses.net we work daily with original Ray-Ban lenses so you can restore your sunglasses with optical precision instead of paying for a full new pair.

Authenticity and logo

We are an official EssilorLuxottica distributor. Original Ray-Ban lenses include the Ray-Ban logo, and polarized versions feature Ray-Ban P. In our own optical workshop in Granada, qualified opticians check every lens with a lensmeter before shipping. Since 2018, we have repaired over 600,000 glasses and shipped more than 400,000 orders to over 50 countries.

Frequently asked questions

Do these lenses fit any frame similar to the RB4278? No. They are made for Ray-Ban RB4278 size 51. Even a very similar frame can have a different groove or curve, which may affect the fit. Can I upgrade my RB4278 to polarized lenses? Yes, choose the 9A - green polarized option. It fits the compatible RB4278 frame and is an excellent upgrade for driving or outdoor use near water. Are they genuine Ray-Ban lenses? Yes. These are original Ray-Ban replacement lenses supplied through the official EssilorLuxottica channel and include the corresponding Ray-Ban branding. How do I avoid ordering the wrong size? Check the inside of the temple for RB4278 and size 51 before placing your order. If the marking is worn, contact us before attempting installation. Do they protect my eyes from the sun? Yes, they provide UV400 protection, blocking 100% UVA/UVB rays. Each lens is also checked by qualified opticians before dispatch. Is installation easy at home? The RB4278 has a plastic front and the lenses are fitted by controlled pressure. If you are not used to this, we recommend visiting an optician to avoid stressing the frame.