Crystal-Clear Vision - Oakley’s HDO lenses give sharper, distortion-free clarity.
Tough Protection - Built to meet ANSI impact standards for superior safety.
Full UV Defence - Blocks 100% of UVA, UVB, UVC, and harmful blue light.
Advanced Tech - Options like Prizm and Polarised enhance colour and contrast.
Built to Last - Scratch-resistant, durable, and backed by Oakley’s 2-year warranty.
Oakley Etched Lenses
Our Premium Non-Branded Lenses are still great lenses for those who have a prescription out of Oakley's range or require a lens not available from Oakley such as Transitions Xtractive or Drivewear.
Complete prescription sunglasses including a genuine Oakley Flak 2.0 XL frame and your choice of lenses. Choose between official Oakley prescription sunglass lenses or high-quality non-branded prescription lenses, all custom made to your prescription.
What’s Included
When you order Oakley Flak 2.0 XL, you’ll receive:
Oakley Flak 2.0 XL frame fitted with Oakley prescription lenses or our own non-branded premium lenses
Official Oakley documentation and authenticity card when purchasing with Oakley prescription lenses.
Oakley protective pouch
Sturdy Oakley case for safe storage
Oakley Flak 2.0 XL Prescription Sunglasses
Complete prescription sunglasses featuring a genuine Oakley Flak 2.0 XL prescription sunglasses frame, fitted with your choice of official Oakley prescription lenses or premium non-branded alternatives.
The Oakley Flak 2.0 XL Prescription Sunglasses are one of Oakley’s most popular and versatile sports models, trusted by athletes and active lifestyle users worldwide. Designed for all-day comfort, high performance, and exceptional durability, this iconic Oakley frame is ideal if you want prescription sports sunglasses that deliver both style and functionality.
With its sleek design and true 8-base wrap, the Flak 2.0 XL has become a classic choice for sports, driving, and everyday wear.
The Flak 2.0 XL combines Oakley’s signature innovation with a lightweight, performance-driven design built for demanding activity.
Durable O-Matter Frame
Built from Oakley’s stress-resistant O-Matter™ material, the frame is lightweight, flexible, and tough enough to withstand intense sporting use.
Unobtainium Grip Technology
Oakley’s Unobtainium nose pads and ear socks increase grip as you sweat, keeping the sunglasses securely in place. The harder you exercise, the more securely they grip.
XL Lens Shape for Enhanced Coverage
The slightly larger XL lenses provide wider coverage, improved peripheral vision, and greater protection from wind, sun, and impact.
Oakley Flak 2.0 XL Three-Point Fit System
Oakley’s Three-Point Fit ensures precise optical alignment of the lenses while reducing pressure points for long-lasting comfort.
Oakley's Sporty & Versatile Design
A universal frame suitable for both men and women, perfect for competitive sport, driving, and everyday active wear.
Flak 2.0 XL Prescription Measurement & Fitting Support
If you don’t know your pupil distance (PD), simply leave the PD option set to the default. Extreme Eyewear will measure this for you.
We’ll send you our PD measuring glasses, allowing you to take a quick photo while wearing them. This enables us to accurately measure your fitting positions and ensure the best possible visual performance from your Oakley Flak 2.0 XL prescription sunglasses.
Oakley Prescription Lens Technology
These sunglasses can be fitted with genuine Oakley prescription lenses, delivering the same optical performance and impact protection Oakley is renowned for.
Wrap-Corrected Optical Precision
Oakley prescription lenses compensate for the wraparound curvature of sports frames. The prescription is recalibrated to eliminate distortion, preventing the “fishbowl” effect often found in older curved lenses.
Full Field of View Clarity
Enjoy sharp, accurate vision across your entire field of view, including peripheral and lower lens areas — ideal for sports such as golf and cycling.
Wide Prescription Range with Edge Technology
Oakley’s Edge Lens Technology reduces edge thickness by approximately 40%, allowing one of the widest prescription ranges available in performance eyewear. This technology is automatically applied for prescriptions over ±2.00.
Optional Prizm™ Lens Technology
Enhance colour, contrast, and detail with Oakley Prizm™ lenses, engineered for specific sports and environments.
By choosing authentic Oakley prescription lenses, you get the perfect balance of protection, clarity, and comfort.
Alternative Prescription Lenses for Oakley Flak 2.0 XL
We also offer carefully selected premium non-branded prescription lenses, sourced from industry-leading suppliers.
These lenses:
Use the same wrap-compensation technology for distortion-free vision
Match the frame’s curvature to maintain fit and feel
Are ideal if your prescription falls outside Oakley’s range or if you want lens options not available in the Oakley programme
Available Alternative Lens Options
Transitions XTRActive®
Transitions XTRActive® Polarised
Transitions® with mirror coatings
Transitions Drivewear®
Additional lens options available on request
Transitions XTRActive® lenses are especially popular for customers wanting a reactive lens that performs effectively inside a vehicle.
What Do We Recommend Oakley Flak 2.0 XL Prescription Sunglasses For?
The Flak 2.0 XL is a top choice for athletes across multiple sports:
Running & Cycling
Lightweight, aerodynamic, and stable on the move. Best paired with Prizm Road or Prizm Trail lenses.
Golf
Prizm Golf lenses enhance contrast and depth perception for improved performance on the course.
Tennis & Cricket
Wide field of vision and secure fit for fast-paced sports.
Everyday Active Wear
Stylish enough for daily use while delivering true sports-level performance.
What’s Included
When you order Oakley Flak 2.0 XL Prescription Sunglasses, you’ll receive:
Genuine Oakley Flak 2.0 XL frame
Prescription lenses (official Oakley or premium non-branded)
Official Oakley authenticity documentation
Oakley protective microfibre pouch
Sturdy official Oakley hard case
Oakley Warranty, Authenticity & Aftercare
Every pair of Oakley prescription sunglasses includes:
Official Oakley two-year manufacturer’s warranty (extended from the standard one year, exclusive to Extreme Eyewear as a Platinum supplier)
100% authenticity guarantee on all frames and lenses
Dedicated aftercare from Extreme Eyewear, including warranty handling, repairs, and adjustments
30-Day Exchange & Refund Promise
You have 30 days from receiving your sunglasses to exchange or refund them. This includes prescription orders — whether you want to change lens colour, frame colour, or even switch to a completely different model. If they’re not suitable, we’ll refund you in full.
Frame Size
Bridge width
12
Arm length
133
Lens diameter
59
Lens height
38
Lead Times
Oakley Prescription Sunglasses – 2 to 3 weeks *
Ray-Ban Prescription Sunglasses – 2 to 3 weeks *
Bolle Prescription sunglasses – 2 to 3 weeks
Rudy Project Prescription sunglasses – 3 to 4 weeks
Uvex Prescription sunglasses – 2 to 3 weeks
Serengeti Prescription Sunglasses – 2 to 3 weeks
Oakley Prescription Sunglasses fitted with Digital custom lenses – 3 to 4 weeks
* If you have a required by date in mind during checkout please leave a note in the ‘comments’ box to advise your date and we will pass it onto the manufacturer. If your date is before the lead times we can’t promise the sunglasses will be delivered in this timescale however the brands will aim to hit your dates.
Prescription Help Understanding your prescription
Your prescription is split into three sections, Sphere, Cylinder and Axis. You will most commonly see this written as, Sph, Cyl and Axis.
There are simple rules for each part of the prescription
Sphere – Is always a number in 0.25 jumps (i.e. 0.25, 0.50, 0.75, 1.00, 1.25). This can either be written in minus or plus (- or +).
IMPORTANT: You must select the correct symbol when ordering (minus or plus, – or +) as selecting the wrong sign will create the completely wrong prescription required to correct your vision.
Cyl – Is always a number in 0.25 jumps (i.e. 0.25, 0.50, 0.75, 1.00, 1.25). This can either be written in minus or plus.
IMPORTANT: You must select the correct symbol when ordering (minus or plus, – or +) as selecting the wrong sign will create the completely wrong prescription required to correct your vision.
Axis – Is a number between 0 and 180, it can also be written to point five (0.5) of a degree. This simply happens if the optometrist can’t decide wether you prefer for example 79 or 80 so they simply write your axis as 79.5. In this case lets get your glasses as accurate as possible so please provide us with the 79.5.
The in instances when a prescription doesn’t have a value for the Cyl section please leave the Axis blank (or some opticians write this as 0.00), the Axis is indicating what degree the Cyl figure sits at so if there is no Cyl there is no Axis required.
Other symbols which are often seen written in a glasses prescription
Infinity Symbol ∞ – this is another way of writing zero (no prescription) so simply select 0.00 into the corresponding section for either sphere or cyl.
Plano – this is another way of writing zero (no prescription) so simply select 0.00 into the corresponding section for either sphere or cyl.
Varifocals - What is the Add (Addition) part of my prescription?
You typically start to get the add part to a prescription when you hit 40+ and it is a measure of the amount of magnification you require to read.
The add is a plus (+) power which identifies how much extra addition (magnification) a glasses wearer requires (on top of their distance prescription) in order to read comfortably at close up distances, such as reading.
NOTE: Sometimes an optician will write your prescription for reading as a full prescription rather than simply supplying your reading add.
Example:
Distance
Right: -2.50 / -0.50 x 180
Left: -2.00 / -0.75 x 175
Near
Right: -1.00 / -0.50 x 180
Left: -0.50 / -0.75 x 175
Reading Add = +1.50
In this case to get your reading add take your distance Prescription Sphere off your reading Shere. The difference between the two figures is your reading add used for Varifocals.
Pupil DistanceLet our Dispensing Optician Measure your Pupil Distance accurately
For the Pupil Distance options on the ordering pages select 'Let Extreme eyewear measure your PD' and we'll post you our specially designed glasses.
(Note: On some projects the PD option will state 'send ruler' this option will still get you the new PD Measuring Glasses)
All you have to do is take a simple photo of you wearing our glasses and emailing your photo to us.
Our Dispensing Optician will then accurately take your mono pupil distances. Our PD glasses allows our dispensing opticians to gain all the details they need to set up single vision and varifocal sunglasses / eyewear accurately.
Let us supply you with perfect vision.
This service is free for all prescription eyewear orders.
What is your PD?
Your Pupil Distance is the measurement between the centre of your right and left pupils in mm.
How can you find out your Pupil Distance?
You may be lucky enough to have been given this by your optician
You can select to have our Pupil Distance measuring glasses posted to you. These will leave us on the same day you place an order 1st class post.
Why have we gone to the trouble of supplying PD Glasses?
Prescription glasses and sunglasses always work better when the centre of the optical lens is over your pupil. Not having this set up correctly can cause head aches and limit how well the glasses will work.
Varifocal Wearers
If you don't know your Mono Pupil Distances (this is two separate measurements for your right and left pupils) we strongly advise you select to have our PD Glasses posted to you. Varifocals with out mono pupil distances will not work correctly.
If you know your Mono Pupil Distances during the checkout there is a comment box, please write your right and left mono pupil distances in this comment box.
Examples
A pupil distance of 65 may have mono pupil distances of
Right 33
Left 32
Your total PD is still the same (65) But by using the separate mono pupil distances the centre of the varifocals will be positioned over your pupils making sure the clear corridor leading to your reading is in the correct position.
How do I receive PD Measuring Glasses?
In the PD options select ‘Let Extreme eyewear measure your PD’. The Digital ruler will be posted out on the same day as your order is placed to your shipping address supplied. (If your order comes in after 4.00pm the ruler will leave us the next day).
Abroad Orders
We will post the PD Measuring Glasses abroad but please allow a little more time to complete your order. The PD measuring glasses may take up to a week to get to abroad addresses.
Reviews
I messed up and they still put it right...
Great service from the guys at extreme Eyewear. I goofed up and ordered the wrong thing. What I wanted was something they did not even sell. But, this was no problem. They ordered in what I wanted and sent it out with a postage bag to send back the wrong product. I messed up and they still put it right. Highly recommended.
Marcus Miller - Google Review
Nothing is too much trouble...
Excellent service. Got a pair of Oakley prescription glasses with Oakley varifocal lenses which I couldn't get from any local opticians . Struggled to get Oakley lenses anywhere to be honest. Two week delivery time turned out to be less than a week and included May bank holiday. Nothing is too much trouble for these guys. Glasses are spot on and you won't find the bloke next to you wearing the same!
