Planet 51
£ 25
A unisex rectangular frame in black/crystal, tortoise, matt black, green or dark purple.
- Frame: Full Rim, Plastic
- Colours: Black/Crystal, Tortoise, Matt Black, Green, Dark Purple
- Case & microfibre cloth included
- Lenses made in our UK labs
- Free delivery
- Free 30-day returns
About the Planet 51
Planet 51 Prescription Glasses
Rectangular frames are the dependable all-rounders of eyewear. The Planet 51 is a unisex full-rim plastic rectangular frame in Black/Crystal, Tortoise, Matt Black, Green or Dark Purple. You can order it with single vision, varifocal or bifocal lenses made to your prescription. It belongs to the Planet collection.
Which colour is you?
Black/Crystal. Black/Crystal pairs black with crystal. It defines the eyes and goes with every outfit you own.
Tortoise. Tortoise is a classic tortoiseshell. It is a classic option that goes with almost anything.
Matt Black. Matt Black is a soft, non-shiny black. It defines the eyes and goes with every outfit you own.
Green. Green is an earthy green. It feels fresh and a little bit different, which is exactly why people notice it.
Dark Purple. Dark Purple is easy to wear. It brings a little personality without overpowering your features.
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
Rectangular lenses suit round and oval faces, adding a bit of definition. Plastic keeps the weight down and allows richer, deeper colour than metal.
It is the kind of frame that works with most outfits, which makes the Planet 51 an easy pick for everyday wear.
Styling tips
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.
Size and fit
| Brand | Planet |
|---|---|
| Frame | Full Rim, Plastic |
| Colours | Black/Crystal, Tortoise, Matt Black, Green, Dark Purple |
| Designed for | Unisex |
The 52mm lenses make this a medium frame that suits most faces.
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 51
Choose the lens type that suits how you use your glasses:
- Single vision: one prescription across the whole lens, for distance, reading or the computer.
- Varifocal: near, intermediate and distance in one lens, with no visible line.
- Bifocal: a separate reading segment in the lower part of the lens.
- Ready readers: simple magnification if you just need help with close work.
If your prescription is high, a high-index lens keeps things thin. An anti-reflective, scratch-resistant coating is a sensible extra for everyday wear.
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.
Made for you in our UK lab
Every pair is made to order in our own UK lab. Your lenses are cut to your prescription, fitted into your Planet 51 and checked by our technicians before they are sent out.
A little care goes a long way
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.
FAQs
Is it unisex?
Yes. It suits men and women.
Can I wear the Planet 51 for driving?
Yes. Single vision or varifocal lenses work well for driving, and an anti-reflective coating helps cut glare from headlights at night.
What is havana or tortoiseshell?
A mottled pattern of browns and ambers, a classic eyewear finish.
Where are my lenses made?
In our UK optical lab. They are cut to your prescription, fitted into your frame and checked before they are sent out.
Still deciding on the Planet 51? Browse more prescription glasses.
Lens prices
Lens types
| Lenses | Single Vision | Bifocal | Varifocal |
|---|---|---|---|
| 1.5 Index (standard) | FREE | ÂŁ40 | ÂŁ69 |
| Transitions | ÂŁ50 | ÂŁ90 | ÂŁ119 |
| Sunglasses tint | ÂŁ10 | ÂŁ50 | ÂŁ75 |
| Blue light filter | ÂŁ30 | ÂŁ70 | ÂŁ99 |
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 | ÂŁ30 | ÂŁ70 | ÂŁ95 |
| 1.67 + HMC | ÂŁ50 | ÂŁ90 | ÂŁ119 |
| 1.74 + HMC | ÂŁ70 | – | ÂŁ135 |
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-BLACK/CRYSTAL 52Ă—14, C2-TORTOISE 52Ă—14, C3-MATT BLACK 52Ă—14, C5-GREEN 52Ă—14, C6-DARK PURPLE 52Ă—14 |
| Eye Size | 52 |
| 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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