Synergy 6004
$ 168 Original price was: $ 168.$ 118Current price is: $ 118.
A unisex square frame in matt black/grey or matt blue/brown. Soft colour fade.
- Size: 53-18-140 mm, lens depth 38 mm
- Frame: Full Rim, Plastic
- Colours: Matt Black/Grey, Matt Blue/Brown
- Case & microfibre cloth included
- Lenses made in our UK labs
- Delivered across Australia
- Free 30-day returns
About the Synergy 6004
Synergy 6004 Prescription Glasses
Square frames have a confident, modern look that works almost anywhere. The Synergy 6004 is a unisex full-rim plastic square frame, sized 53-18-140, in Matt Black/Grey or Matt Blue/Brown. You can order it with single vision, progressive or bifocal lenses made to your prescription. You will find it in our Synergy collection.
Matt Black/Grey or Matt Blue/Brown: which one is you?
Matt Black/Grey. In Matt Black/Grey, the frame is matte black that fades to grey. It defines the eyes and goes with every outfit you own.
Matt Blue/Brown. In Matt Blue/Brown, the frame is matte blue that fades to brown. It is softer than black and suits brown, auburn and red hair.
If you are stuck between two, choose the one closest to the colours you wear most. You can always add a second pair later.
About the Synergy 6004 design
Square lenses add structure to round and oval faces and make features look more defined. A soft colour fade defines the brow line and lets the lower half of the frame melt away.
Look for the little studs at the corners, a classic detail that lifts the whole frame. The matte finish looks modern and keeps fingerprints and shine to a minimum. The plastic frame is light on the nose and comfortable for all-day wear.
If you want a frame you can put on in the morning and forget about, the Synergy 6004 is a strong choice.
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.
How it fits
| Brand | Synergy |
|---|---|
| Frame | Full Rim, Plastic |
| Colours | Matt Black/Grey, Matt Blue/Brown |
| Frame size | 53-18-140 mm (lens width, bridge, arm length) |
| Lens depth | 38 mm |
| Designed for | Men, Women |
At 53mm per lens, it sits in the medium range, the most common adult fit. The 18mm bridge is average. The 140mm arms are a standard length. Across the lenses and bridge it measures about 124mm.
The easiest way to check is against glasses you already love. Most frames show their size inside the arm; if yours are close to these, you are in safe territory.
Lens options for the Synergy 6004
Your optometrist’s prescription will usually tell you which of these you need:
- Progressive lenses for clear vision at every distance without swapping pairs.
- Single vision for one job done well: driving, reading or desk work.
- Bifocal if you like a clearly marked reading section.
- Ready readers when you only need help close up.
The 38mm lens depth gives progressive lenses plenty of room. Prefer to keep things slim? Choose a high-index lens, which is thinner and lighter than standard. Then add an anti-reflective coating to cut glare from headlights and screens. Spend a lot of time on screens? This frame is also part of our blue light glasses range.
Before you order
Check that your prescription is current; an eye test every couple of years is a good habit, and your optometrist will tell you how often you need one. You will also need your PD, which tells the lab where to centre the lenses so you look through the right spot. With those two things in hand, ordering takes just a few minutes: choose your colour, pick your lenses, enter your details and you are done.
How your glasses are made
Choose your colour and lenses, enter your prescription and PD, and our optical lab in the UK makes your lenses and fits them into your Synergy 6004 before sending them to you in Australia.
Keep them looking new
Rinse off dust before wiping, dry the lenses with a clean microfibre cloth, and take your glasses off with both hands so the arms stay straight. For more tips, see our lens care guide.
FAQs
Can I get progressive lenses in the Synergy 6004?
Yes. The 38mm lens depth gives progressive lenses enough height for all three vision zones.
Can I use the Synergy 6004 as computer glasses?
Yes. Single vision lenses set to your screen distance, or progressive lenses if you also need distance vision, both work well for desk work.
What size is it?
It is size 53-18-140: 53mm lens width, 18mm bridge and 140mm arms, a medium fit.
Is it unisex?
Yes. It suits men and women.
What does the colour fade look like?
The colour is darker at the top of the frame and becomes lighter towards the bottom.
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.
Want to compare? See more women’s glasses, men’s glasses and 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
| Color | Matt Black/Grey, Matt Blue/Brown |
|---|---|
| Eye Size | 53 |
| Brand | Synergy |
| Lens Depth | 38 |
| Temple Length | 140 |
| Bridge Size | 18 |
| Type | Optical |
| Material | Plastic |
| Wearer | Men, Women |
| Rim | Full Rim |
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 to Australia: the cost and your estimate are shown at checkout before you pay.
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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