Planet 81
£ 25
A unisex square frame in navy, wine or matt black.
- Frame: Full Rim, Plastic
- Colours: Navy, Wine, Matt Black
- Case & microfibre cloth included
- Lenses made in our UK labs
- Free delivery
- Free 30-day returns
About the Planet 81
Planet 81 Prescription Glasses
Square frames have a confident, modern look that works almost anywhere. The Planet 81 is a unisex full-rim plastic square frame in Navy, Wine or Matt Black. You can order it with single vision, varifocal or bifocal lenses made to your prescription. It belongs to the Planet range.
Choosing your Planet 81 colour
Navy. Navy is a deep, dark blue. It looks great with blue or grey eyes and pairs easily with denim and white.
Wine. Wine is a deep wine red. It is a grown-up way to wear colour.
Matt Black. Matt Black is a soft, non-shiny black. It looks sharp at work and just as good with jeans at the weekend.
If you are stuck between two, choose the one closest to the colours you wear most. You can always add a second pair later.
Why you will like it
Square lenses add structure to round and oval faces and make features look more defined. Plastic keeps the weight down and allows richer, deeper colour than metal.
The Planet 81 is a great everyday frame: smart enough for work and relaxed enough for the weekend.
How to wear it
Because it is unisex, it is easy to share the look across the household. Pick the colour that matches your wardrobe rather than worrying about who it is designed for.
How it fits
| Brand | Planet |
|---|---|
| Frame | Full Rim, Plastic |
| Colours | Navy, Wine, Matt Black |
| Designed for | Unisex |
At 55mm per lens, it is a generous size, a good pick if standard frames feel tight.
To check the fit, look at the three numbers printed inside the arm of glasses you already own. If they are within two or three millimetres, this frame should feel similar.
Lens options for the Planet 81
Your optician’s prescription will usually tell you which of these you need:
- Varifocals if you want to see near and far without swapping glasses.
- Single vision for one task done well, such as driving, reading or screen work.
- Bifocals if you prefer a clearly defined reading area.
- Ready readers for straightforward close-up help.
Want lighter lenses? A high-index lens is thinner than standard plastic. Pair it with an anti-reflective coating for less glare when you drive after dark.
What you will need
Have your prescription to hand before you start. It shows the sphere, cylinder and axis for each eye, and sometimes your PD. If the PD is missing, your optician can give it to you. Then choose your colour and lens type, enter your prescription and add any extras, such as thinner lenses or a coating. You can check everything in your basket before you pay.
From our lab to you
Every pair is made to order in our own UK lab. Your lenses are cut to your prescription, fitted into your Planet 81 and checked by our technicians before they are sent out.
Keep them looking new
Use lens spray and a soft cloth, fold the arms before putting your glasses down, and store them in a hard case. Our guide to looking after your lenses covers the rest.
Your questions, answered
Is it a large frame?
Yes. With 55mm lenses it suits wider faces.
Can I use the Planet 81 as computer glasses?
Yes. Single vision lenses set to your screen distance, or varifocals if you also need distance vision, both work well for desk work.
Is it unisex?
Yes. It suits men and women.
Do you make the lenses yourselves?
Yes. Every pair is made to order in our UK optical lab, where your lenses are cut to your prescription and fitted into your frame.
Not quite the one? Take a look at our prescription glasses.
Lens prices
Lens types
| Lenses | Single Vision | Bifocal | Varifocal |
|---|---|---|---|
| 1.5 Index (standard) | FREE | £40 | £69 |
| Transitions | £50 | £90 | £119 |
| Sunglasses tint | £10 | £50 | £75 |
| Blue light filter | £30 | £70 | £99 |
Basic 1.5 Single Vision lenses with anti-reflection coating are included in the frame price.
Thinner lens upgrades
| Lens index | Single Vision | Bifocal | Varifocal |
|---|---|---|---|
| 1.6 + HMC | £30 | £70 | £95 |
| 1.67 + HMC | £50 | £90 | £119 |
| 1.74 + HMC | £70 | – | £135 |
Higher index lenses are thinner and lighter, and are worth it for stronger prescriptions. All include an HMC coating.
Frame details & size guide
Specifications
| Brand | Planet |
|---|---|
| Color | C1-NAVY 55×17, C2-WINE 55×17, C3-MATT BLACK 55×17 |
| Eye Size | 55 |
| Type | Optical |
| Material | Plastic |
| Rim | Full Rim |
| Wearer | Unisex |
How to read frame sizes
The three numbers (for example 48-20-140) are the lens width, the bridge and the arm length in millimetres. Compare them with a pair you already own.

Delivery, returns & what is included
Delivery
- Single Vision: 5-7 working days
- Bifocal: 7-10 working days
- Varifocal: 7-10 working days
- Dispatched within 48 hours by tracked Royal Mail service
Delivery is free. Your estimate for your country is shown at checkout.
Returns & exchanges
Free 30-day returns or exchanges. If your glasses are not right for you, we will make it right.
What is included
- Anti-reflection lenses included
- Case and microfibre cloth
- Lenses made in our UK optical lab
- All frames CE marked
- Worldwide delivery
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