Solo 813
£ 39
A unisex rounded square frame in black, blue or matt crystal. Clear crystal finish.
- Size: 48-19-145 mm, lens depth 39 mm
- Colours: Black, Blue, Matt Crystal
- Case & microfibre cloth included
- Lenses made in our UK labs
- Free delivery
- Free 30-day returns
About the Solo 813
Solo 813 Prescription Glasses
A rounded square gives you the softness of a round frame with a little more structure. The Solo 813 is a unisex full-rim rounded square frame, sized 48-19-145, in Black, Blue or Matt Crystal. You can order it with single vision, varifocal or bifocal lenses made to your prescription. You will find it in our Solo collection.
Choosing your Solo 813 colour
Black. Black is a deep, solid black. It looks sharp at work and just as good with jeans at the weekend.
Blue. In Blue, the frame is navy. It brings a cool, calm touch of colour that suits most skin tones.
Matt Crystal. Matt Crystal is easy to wear. Because light passes through it, the frame looks lighter on the face and lets your features do the talking.
Each colour is shown in the gallery, so you can compare them side by side before you decide.
The details
The rounded corners and straight lines balance most face shapes, especially oval, square and heart-shaped faces. The crystal finish is clear and fresh, and it lets your features take centre stage.
The Solo 813 is a great everyday frame: smart enough for work and relaxed enough for the weekend.
Wearing it every day
Choose the colour closest to what you wear most and it will go with almost everything.
Size and fit
| Brand | Solo |
|---|---|
| Colours | Black, Blue, Matt Crystal |
| Frame size | 48-19-145 mm (lens width, bridge, arm length) |
| Lens depth | 39 mm |
With 48mm lenses, this is a compact frame that suits smaller faces. The 19mm bridge is a little wider than average. The 145mm arms are on the longer side, which suits larger heads. Across the lenses and bridge it measures about 115mm.
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 813
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.
The 39mm lens depth gives varifocal lenses plenty of room. With a stronger prescription, a thinner high-index lens keeps the edges slim, and an anti-reflective coating cuts reflections from screens and street lights.
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 813 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.
Keep them looking new
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 813?
Yes. The 39mm lens depth gives varifocal lenses enough height for all three vision zones.
Can I use the Solo 813 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 a small frame?
Yes. With 48mm lenses it suits smaller faces.
What does crystal mean?
A clear, see-through finish.
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.
Still deciding on the Solo 813? 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 | 19 |
| Color | Black, Blue, Matt Crystal |
| Eye Size | 48 |
| Lens Depth | 39 |
| Temple Length | 145 |
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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