Solo 851
£ 39
A unisex soft square frame in blue, crystal pink or dark purple. Clear crystal finish.
- Size: 53-17-140 mm, lens depth 39 mm
- Colours: Blue, Crystal Pink, Dark Purple
- Case & microfibre cloth included
- Lenses made in our UK labs
- Free delivery
- Free 30-day returns
About the Solo 851
Solo 851 Prescription Glasses
If you like structure but not sharp angles, a soft square is the sweet spot. The Solo 851 is a unisex full-rim soft square frame, sized 53-17-140, in Blue, Crystal Pink or Dark Purple. You can order it with single vision, varifocal or bifocal lenses made to your prescription.
Choosing your Solo 851 colour
Blue. In Blue, the frame is translucent blue. It brings a cool, calm touch of colour that suits most skin tones.
Crystal Pink. Crystal Pink is a good everyday shade. Because light passes through it, the frame looks lighter on the face and lets your features do the talking.
Dark Purple. Dark Purple keeps things simple. It works beautifully with navy, grey and silver jewellery.
Each colour is shown in the gallery, so you can compare them side by side before you decide.
About the Solo 851 design
The softened corners suit round, oval and heart-shaped faces, adding a little shape without looking severe. A crystal front looks modern and light, and it goes with everything.
The translucent finish lets light through, so the frame looks lighter and softer than a solid colour.
Whether it is your main pair or a spare, the Solo 851 is easy to live with.
Styling tips
Choose the colour closest to what you wear most and it will go with almost everything.
How it fits
| Brand | Solo |
|---|---|
| Colours | Blue, Crystal Pink, Dark Purple |
| Frame size | 53-17-140 mm (lens width, bridge, arm length) |
| Lens depth | 39 mm |
At 53mm per lens, it sits in the medium range, the most common adult fit. The 17mm bridge is average. The 140mm arms are a standard length. Across the lenses and bridge it measures about 123mm.
Not sure about sizing? Compare these numbers with the ones on the inside arm of a pair that fits you well. A difference of two or three millimetres or less usually means a similar fit.
Lens options for the Solo 851
Your optician’s prescription will usually tell you which of these you need:
- Single vision: the same prescription from edge to edge.
- Bifocal: distance at the top and a reading segment at the bottom.
- Varifocal: a smooth change from distance to reading, with no line.
- Ready readers: a fixed magnification for books, phones and screens.
The 39mm lens depth gives varifocal lenses plenty of room. 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.
Before you order
Make sure your prescription is in date; most adults in the UK are advised to have an eye test every two years, and your optician will tell you if you need one sooner. You will also need your PD, which tells our lab where to centre the lenses. With those two things ready, ordering takes a few minutes: choose your colour, pick your lenses, enter your details and you are done.
How your glasses are made
Your Solo 851 is glazed in our UK-based lab. Once you have chosen your lenses and entered your prescription, we cut and fit the lenses and check the finished glasses before they go out.
A little care goes a long way
Clean your lenses with a microfibre cloth rather than your jumper, keep them in their case when they are in your bag, and do not leave them on a sunny car dashboard. Our lens care guide has more tips.
Your questions, answered
Can I get varifocal lenses in the Solo 851?
Yes. The 39mm lens depth gives varifocal lenses enough height for all three vision zones.
Can I use the Solo 851 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.
What size is it?
It is size 53-17-140: 53mm lens width, 17mm bridge and 140mm arms, a medium fit.
What does crystal mean?
A clear, see-through 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 Solo 851? 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 | Solo |
|---|---|
| Bridge Size | 17 |
| Color | Blue, Crystal Pink, Dark Purple |
| Eye Size | 53 |
| Lens Depth | 39 |
| Temple Length | 140 |
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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