Retro Sun 031 Memory Metal
£ 94 Original price was: £ 94.£ 69Current price is: £ 69.
Unisex round sunglasses in black or brown tortoise.
- Size: 51-21-145 mm
- Frame: Full Rim, Metal
- Colours: Black, Brown Tortoise
- Case & microfibre cloth included
- Lenses made in our UK labs
- Free delivery
- Free 30-day returns
About the Retro Collection Retro Sun 031 Memory Metal
Retro Sun 031 Memory Metal Prescription Sunglasses
Round frames soften the face in a way square ones just cannot. The Retro Sun 031 Memory Metal is a pair of unisex full-rim metal round sunglasses, sized 51-21-145, in Black or Brown Tortoise. It can be made with your prescription, so you can see clearly and keep the sun out at the same time. It is part of our Retro Collection.
Choosing your Retro Sun 031 Memory Metal colour
Black. Black is a deep, solid black. It looks sharp at work and just as good with jeans at the weekend.
Brown Tortoise. Brown Tortoise is a good everyday shade. It flatters warm and olive skin and works with almost any outfit.
Still torn? Think about what you wear on an ordinary weekday, not on a night out. That is the colour you will be happiest with.
Design details
Round frames soften angular features, so they are a great match for square and heart-shaped faces. Metal lets the frame stay slim and light while keeping its shape.
Keep the Retro Sun 031 Memory Metal in the car, take it to the beach or wear it on your lunch break; it is ready for bright summer days.
Styling tips
Easy to wear with almost anything, from beachwear to a smart jacket.
How it fits
| Brand | Retro Collection |
|---|---|
| Frame | Full Rim, Metal |
| Colours | Black, Brown Tortoise |
| Frame size | 51-21-145 mm (lens width, bridge, arm length) |
| Lens depth | 43 mm |
| Effective diameter | 50 mm |
The 51mm lenses make this a medium frame that suits most faces. The 21mm bridge is wider than average, which suits a broader nose bridge. The 145mm arms are on the longer side, which suits larger heads. 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.
Prescription lenses for the Retro Sun 031 Memory Metal
The Retro Sun 031 Memory Metal can be made with any of these lens types:
- 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.
At 43mm, the lens depth is deeper than most frames in our range, so varifocal lenses have lots 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.
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
Your Retro Sun 031 Memory Metal 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
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
Can I get the Retro Sun 031 Memory Metal with my prescription?
Yes. Choose single vision, varifocal, bifocal or ready reader lenses when you order.
Can I get varifocal lenses in the Retro Sun 031 Memory Metal?
Yes. The 43mm lens depth gives varifocal lenses enough height for all three vision zones.
What size is it?
It is size 51-21-145: 51mm lens width, 21mm bridge and 145mm arms, a medium fit.
Will it suit a wider nose bridge?
Yes. The 21mm bridge is wider than most frames.
Who glazes my lenses?
Our own optical lab in the UK. Your lenses are made to your prescription and fitted into the frame before your glasses are sent to you.
Still deciding on the Retro Sun 031 Memory Metal? Browse more prescription sunglasses.
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
| Color | Black, Brown Tortoise |
|---|---|
| Brand | Retro Collection |
| Bridge Size | 21 |
| Eye Size | 51 |
| Effective Diameter | 50 |
| Temple Length | 145 |
| Lens Height | 43 |
| Type | Sunglasses |
| Rim | Full Rim |
| Material | Metal |
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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