Original Ray-Ban 3857 Frank replacement lenses
If the lenses in your Ray-Ban 3857 Frank are scratched, you do not need to replace the whole pair. These original Ray-Ban replacement lenses bring back the factory look, optical clarity and UV protection while helping you save money compared with buying new sunglasses. ReplacementLenses.net offers free shipping on qualifying orders and every order is handled by qualified opticians in our own workshop in Granada.
Model compatibility
These lenses are made for the Ray-Ban 3857 Frank model. Before ordering, check that the reference inside your frame reads RB3857 or 3857 and then select the correct size and lens option. They are not recommended for copies or similar-looking frames, because the rim shape, bevel and Base 6 curve must match precisely.
How to identify your model and size
Look inside the temple arm of your sunglasses. Ray-Ban frames normally show the model code followed by the lens size and bridge size. For this product, available lens sizes are 48, 51 and 54; choose the same number marked on your frame.
The Ray-Ban size is measured in millimetres across the lens width, not diagonally. Do not try to trim a wrong size: on a metal frame such as the Frank, the lens needs to seat perfectly inside the rim.
Main features
- Compatible model: Ray-Ban 3857 Frank.
- Product type: original Ray-Ban lenses.
- Available sizes: 48, 51 and 54.
- Lens material: glass.
- Shape: square.
- Lens curve: Base 6.
- Use: adult sunglasses.
- Associated temple material: metal.
- UV400 protection: blocks 100% UVA and UVB rays.
Available colours
- 31 – Green – Glass.
- 33 – Brown uniform – Glass.
- 3F – Blue gradient – Glass.
- 51 – Light brown gradient – Glass.
- 58 – Green polarized – Glass.
- AF – Polar purple – Glass.
- S2 – Polar blue – Glass.
- R5 – Grey – Glass.
- 4E – Green – Glass.
- BL – Clear.
Material, protection and lens options
These Ray-Ban RB3857 replacement lenses are made from glass, the classic optical material used in many Ray-Ban sunglasses for its clean vision and scratch resistance. The Base 6 curve preserves the original fit in the metal rim and keeps the frame geometry as intended.
Polarized lens options are clearly marked in the colour list: 58, AF and S2. They help reduce glare from roads, water and reflective surfaces. As original Ray-Ban lenses, they provide UV400 protection against UVA and UVB radiation.
Why replace only the lenses
The metal frame of the Ray-Ban Frank is built to last. In daily use, the lenses are usually the part that suffers most from scratches, impacts or surface wear. Replacing only the lenses lets you keep the frame that already fits your face and restore the sunglasses for a fraction of the cost of a new pair.
It is also the more sustainable choice: you keep an original frame in use and replace only the worn component. You can find more options in our original Ray-Ban lenses category.
Authenticity and logo
We are an official EssilorLuxottica distributor. These Ray-Ban 3857 Frank lenses are original and include the Ray-Ban logo; polarized versions display Ray-Ban P. Our qualified opticians check lenses in our Granada workshop using a lensmeter before shipping.
Since 2018, we have repaired more than 600,000 pairs of glasses and processed over 400,000 orders in more than 50 countries. That practical experience helps us verify model, size and lens quality with the care this kind of replacement deserves.
Frequently asked questions
Will these fit any Ray-Ban Frank frame?
They fit the Ray-Ban 3857 Frank when the size matches your frame. Always check the code on the temple and select 48, 51 or 54 accordingly.
How do I know my size?
The lens size is printed inside the temple arm, next to the RB3857 model reference. Choose exactly the same number shown on your sunglasses.
Are these glass or plastic lenses?
According to this product’s attributes, the lenses are glass. This keeps the optical feel and finish expected from original Ray-Ban lenses for this model.
Are polarized options available?
Yes, but only when the lens option says so: 58 – Green polarized, AF – Polar purple or S2 – Polar blue. Original polarized Ray-Ban lenses carry the Ray-Ban P marking.
Can I install them in a copy frame?
We do not recommend it. Even minor differences in the rim or Base 6 curve can prevent the lens from fitting safely.
Is home installation difficult?
Because the Frank is a metal frame, the lens is usually changed by loosening the rim screw, replacing the lens and tightening it gently. If you are not used to handling eyewear, an optical store is the safest option.
Do they keep the original sun protection?
Yes. As original Ray-Ban lenses, they provide UV400 protection, blocking 100% of UVA and UVB rays.
Example for guidance only. The position and order of the codes may vary depending on the frame.
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