Oakley Flak 2.0 S prescription sunglasses are designed for sport, delivering high-performance vision, protection and comfort in a compact fit. Built from lightweight and durable O-Matter™ material, the Flak 2.0 S features Oakley’s semi-rimless design for an extended field of view and secure, stay-put comfort during activity. Available with genuine Oakley lenses for authentic performance or premium non-branded prescription lenses for excellent clarity and value, making them ideal for cycling, running, golf and active outdoor use.
Oakley Flak 2.0 S Prescription Sunglasses
The Oakley Flak 2.0 S is a high-performance sports sunglass designed for athletes who want uncompromising vision, protection and stability in a smaller, more compact fit. Built for speed and precision, the Flak 2.0 S is ideal for cycling, running, golf and other fast-paced outdoor sports.
Featuring Oakley’s iconic semi-rimless design, the Flak 2.0 S offers an extended field of view while maintaining a lightweight feel. The frame is crafted from durable O-Matter™ material, ensuring long-lasting comfort even during intense activity.
Oakley Flak 2.0 S prescription sunglasses are available with Genuine Oakley lenses or Premium Non-Branded prescription lenses, allowing you to choose between Oakley’s factory-authentic optics or a high-quality, great-value alternative.
Genuine Oakley Prescription Lenses
Choosing Genuine Oakley lenses ensures your Flak 2.0 S sunglasses are fitted with optics engineered exactly to Oakley’s specifications. These lenses are designed to enhance contrast, clarity and impact resistance, helping you see detail more clearly in changing conditions.
Benefits include:
Authentic Oakley lens technology
Precision-matched optics for the Flak 2.0 S frame
Optional polarised lenses to reduce glare
Excellent UV protection for outdoor sport
Premium Non-Branded Prescription Lenses
Our Premium Non-Branded lenses are an excellent choice for customers seeking advanced optical performance with outstanding value.
Features include:
High-definition digital Freeform optics
Clear, distortion-free vision across the lens
Options for polarisation, mirror coatings and tints
Ideal for sport and everyday outdoor use
Both lens options are professionally glazed to ensure a precise fit and optimal performance in the Flak 2.0 S frame.
Oakley Sport Fit & Stability
The Flak 2.0 S is designed to stay secure during movement, with Unobtainium® nose pads and ear socks that increase grip as you sweat. This ensures a stable, slip-free fit even during high-intensity training or competition.
The compact “S” fit makes this model particularly suitable for smaller faces or those who prefer a closer, more secure feel.
What’s Included with Our Oakley Flak 2.0 S Prescription Sunglasses
All our prescription pricing is fully inclusive, with no hidden extras:
Oakley Flak 2.0 S frame
Prescription lenses (Genuine Oakley or Premium Non-Branded)
Oakley Case & Pouch
Frame Size
Bridge width
16 mm
Arm length
123 mm
Lens diameter
59 mm
Lens height
37 mm
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!
