Prescription sunglassesEverything you wanted to know about prescription

sunglasses but were afraid to ask

www.julbo-eyewear.com

With nature as its playground, Julbo has always looked after the needs of outdoor sports fans by working hard to find the best solutions to help each

and every one of them see the world better; because it's not your vision that's going to stop you!

1. Why use sports sunglasses?

When practising sport, good vision is essential to read the terrain correctly. More than 70% of our movements are guided by our vision. Sunglasses are therefore much more than a simple fashion accessory and can be used as a tool to improve performance.

You're a glasses wearer and would like to be able to use prescription sunglasses? Using its expertise in sunglasses solutions and sports eyewear, Julbo can help you through its prescription sunglasses program, known as RX Trem: the full spectrum of Julbo technology adapted to your vision and your favorite discipline, from daily use to the most extreme sport.

Find the answers to your questions on prescription sunglasses below.

2. What are the conventional solutions if you wear glasses and want to practice sport?

Several solutions are offered by opticians:

Keep wearing your normal glasses... but they won't protect you from the sun and aren't suited to practising sport (fragility, poor hold, etc.).

Prescription sunglasses with a low base curve (max. 6): this solution is simple but has the disadvantage of limiting the field of vision.

Prescription clip-ons: another simple solution but which has several disadvantages (reduced field of vision, poor comfort levels and limited optical quality).

Contact lenses: they offer a very good alternative, but not everyone gets on with them and many types of sport involve factors that make them particularly uncomfortable (dust, perspiration, dryness of the eye, etc.).

3. What shape should sports sunglasses be?

A wraparound shape and curved lenses are two essential features of sports sunglasses. Their purpose is to provide a wide field of vision and block out the sun's rays but also to protect the wearer from all the elements they might encounter in the great outdoors such as wind, dust, salt water, etc.

This shape has traditionally been a problem for wearers of corrective lenses because it is difficult to adapt them to a curved frame.

4. Are prescription lenses suitable for curved sports frames?

Curved frames require a large lens surface which increases the area of vision to be corrected by the glasses:

This leads to the risk of blurring of peripheral vision Wraparound glasses require a large base curve (angles between the two lenses); 8 for a sports frame compared with 4.5 for conventional sunglasses. This has the effect of decentering the optical axis.

Complex optical processes are necessary to correct this problem: Julbo has developed lenses of variable thicknesses in order to produce the same specifications as a conventional sunglasses lens.

5. Can you get prescription lenses into curved frames?

YES. With the Julbo RX Trem program, new digital lens surfacing techniques make it possible to produce prescription sunglasses with curved frames.

Angle of visionRX Trem lenses offer the widest field of distortion-free vision possible, ensuring clear vision whichever direction is looked in. In other words, the angle of vision is increased by around 20%.

Expanded optical centerRX Trem lenses offer an expanded optical center which means the optical axis of the glasses can be recentered despite a high base curve.

No distortionNo distortion

6. What about the quality of sun protection offered by prescription sunlenses?

All RX Trem lenses are treated with in-mass technology. The entire depth of the lens is colored, polarized and treated photochromically for optimum durability and resistance.

In-mass treatment technology 

Photochromic tint

Machined during surface treatment

Polarizing film

7. Is it possible to wear progressive lenses in sports sunglass frames?

Progressive lenses are used to correct both short-sightedness (myopia, astigmatism) and long-sightedness (presbyopia).

Outdoor sports require both excellent overall vision combined with good close vision for reading maps and other information.

Through its RX Trem program, Julbo offers progressive lenses optimized for use in movement. The coating technology of RX Trem lenses favors dynamic vision. It guarantees the moving wearer perfect distance as well as intermediate vision and close-up vision is easily obtained.

8. Is it difficult to get used to prescription lenses in curved frames?

With RX Trem prescription sunglasses, adaptation is immediate!

Incorporation of a compensating prism in the surface finish, together with the wide field of vision provided by our lens design, ensures that the wearer adapts to our equipment almost immediately.

9. Which frame for your sport?

Each sport has specific requirements and it's therefore important to clearly define them so you get the most suitable lenses and frames. We recommend:

for high-mountain wear: a wraparound frame with side shields to block out glare from the sun's rays and straight or adjustable temples for good hold under a helmet or hat.

for mountain biking / cross-country skiing: a light frame with slim temples for slipping under a helmet or cap and good grip on the nose and temples to keep the glasses on the face.

for trail running: a very light frame with suspended lenses for optimum ventilation and maximum comfort over long periods of time.

water sports: a flexible, wraparound frame to protect against splashing water but with good ventilation to prevent fogging.

Travelling: a frame comfortable enough to be forgotten so you can wear it all day.

10. Which materials for your sport?

The most important thing is for a sunlens to be tough, and light enough to forget you're wearing it. The comparison table below shows the materials used to make prescriptions sunlenses.

Light and tough: Julbo RX Trem lenses are available in NXT® and PC, light materials that are low-density and ultra-tough, and particularly suitable for sports and outdoor activities.

Material Refractive index

Production ABBE number

Density Resistance Surfacing

Mineral lens 1.5 - 1.8 Cast 42 - 59 ~ 2.5 + +

CR39 1.50 Cast 58 1.3 -- -

MR8 1.60 Injected 42 1.3 - ++

PC 1.59 Injected 32 1.2 + +

NXT 1.53 Cast 45 1.11 ++ -

10. Which materials for your sport?// Julbo RX Trem lenses: NXT vs Polycarbonate

NXT: its transparency and stability over time are exceptional. It is ultra light, unbreakable, solvent-resistant and of good optical quality.

Polycarbonate: light and multipurpose, it is suitable for all sports and budgets. It is also a material with a higher refractive index (1.59), making it easier to create prescription lenses for sports people with high optical correction.

11. Which lens color?

Depending on its color, a lens will filter light differently, producing particular characteristics:

Brown/yellow lens: accentuates relief.

Grey lens: faithful color reproduction.

Copper lens: accentuates contrasts, more comfortable vision.

12. Which finishes can be used on a prescription sunlens?

Photochromic treatment: the lens gets darker or lighter depending on the intensity of the light.

Polarizing treatment: eliminates glare from the sun on reflective surfaces (snow, water, etc.).

Anti-reflective coating: reduces eyestrain and eliminates interference glare.

Oil-repellent coating: prevents finger or grease marks and makes cleaning easier.

Hydrophobic coating: causes water to glide over the lens, improving visibility.

Photochromic: protection category 2 to 4. Fast activation speed: from 22 to 28 s. Brown tint: accentuates relief.

This photochromic lens, developed for the Speed range, is ideal for mountain biking, trail running and climbing.

FROM SHADE TO LIGHT

13. Which lens for practising sport?

Photochromic: protection category 1 to 3. Fast activation speed Brown tint: accentuates relief.

This photochromic and anti-fog lens, developed for the Speed range, is ideal for mountain biking, trail running and climbing.

FROM SHADE TO LIGHT

13. Which lens for practising sport?

3 ou 4

Photochromic: protection category 2 to 4. NTS technology: the lens gets darker or lighter regardless of the temperature. Polarizing: eliminates snow glare, ensuring purity of vision. Brown tint: accentuates relief.

This photochromic, anti-fog and polarizing lens, developed for the outdoor range, is designed for use in mountain and desert environments.

PURE ALL-TERRAIN VISION

13. Which lens for practising sport?

Photochromic: protection category 2 to 4. NTS technology: the lens gets darker or lighter regardless of the temperature. External and internal hydrophobic coating: makes water run off the lens,

improving visibility. Grey: faithful color reproduction.

This photochromic, polarized and water-repellent lens, developed for the Nautic range, is suitable for all water sports.

A CLEAR VIEW TO THE HORIZONIN ALL WEATHERS

13. Which lens for practising sport?

Photochromic: protection category 2 to 3. Polarizing: eliminates glare from all reflective surfaces (water, tarmac, glass etc.)

and provides the purest of vision. Anti-reflective coating: reduces eyestrain and eliminates interference glare. BWS (Behind the Windshield): the lens will get darker behind a windshield and is

particularly suitable for driving. Copper: accentuates contrasts, more comfortable vision.

This lens, developed for the Travel range, is multipurpose and recommended for driving.

CLEAR VISION AT ALL TIMES

13. Which lens for practising sport?

13. Which lens for practising sport?

Polycarbonate is an excellent compromise, producing prescription sunlenses which are extremely tough and low density. It also combines ease of surfacing with good optical quality.

Category 3 brown lens for multi-purpose use

Category 4 brown lens for maximum protection in high glare conditions. Flash finish.

Category 3 grey lens with polarizing filter.to combat glare from water, snow and windscreens.

13. Which lens for practising sport?

Lens MaterialsProtection

indexVLT*

Mountaine-ering

Hiking Skiing

Cross country skiing

SailingMountain

bikingTrail

runningTravel Driving

Zebra NXT© 2 to 4 7-42%** x xxxx xxx xxxx x xxxx xxxx x x

Zebra Light NXT© 1 to 3 16-80% - x - xxxx x xxxx xxxx x x

Cameleon NXT© 2 to 4 5-20% xxxx xxxx xxxx x x x x x x

Octopus NXT© 2 to 4 5-30% x x x x xxxx x x xxx x

Falcon NXT© 2 to 3 9-20% x x x x xxx x x xxxx xxxx

Spectron3 Polycarbonat 3 13% xx xxx xxx xxx xxx xxx xxx xxx xxx

Spectron4 Polycarbonat 4 5% xxxx xx xxxx - x x x x -

Polarized3 Polycarbonat 3 12% xx xxx xx xx xxxx xx xx xxx xxx

* Visible light transmission rate** At an ambient temperature of 10 ° C.

14. Which sunglasses can I use for my correction?

Talking with your optician is essential to get the most suitable frame.

The most important points you need to discuss are:

Corrective power (prescription)

Intensity of use and sporting discipline

This initial information will allow the optician to select the appropriate lenses and frames available in your correction.

After making the necessary adjustments in terms of comfort and facial shape, the optician will take 4 measurements (instead of the usual 2) to ensure you get the best quality lens: pupillary distance, lens depth, lens/eye distance, pantoscopic tilt.

For any new prescription, we recommend conducting tests to make sure it's correct.

The RX selector allows you to see which Julbo sunglasses are available with your correction: http://www.julbo-eyewear.com/en/rx-selector.html

15. How can I get hold of Julbo prescription sunglasses?

In order to offer you the best possible service, Julbo has selected the opticians participating in the RX Trem program on the basis of their familiarity with the brand and their qualifications.

These opticians were then trained to give them the best possible knowledge of the procedures for selecting the lenses and frames in the program.

We have also provided them with the necessary equipment for conducting in-store tests.

See our partners on www.julbo-eyewear.com in the "Resellers" section to find a Julbo RX Trem optician.

Julbo EuropeRue Lacuzon

39400 Longchaumois - FranceTel.: +33 (0)3.84.34.14.14

info@julbo.fr

www.julbo-eyewear.com

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Julbo USA296 Avenue D, Ste 10

Williston, VT 05495 - USAPhone: 802-651-0833

info@julbousa.com

www.julbousa.com