TECHNICAL SPECIFICATIONS - PROPERTIES

Please take the time to browse through this section and understand why EYRES are of the highest standard.

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OPTICAL : X-LENS PARALLEL VISION CONTROL

LUMINOUS TRANSMITTANCE

Only a minute fraction of the sun's electromagnetic radiation excites our retinas.
The visible portion of the spectrum extends from 380 to 770 nanometers, and while our
eyes cannot discern rays outside this range, they are still very sensitive to them.

EYRES SAFETY OPTICS SPECTRUM

Sunray Transmittance	Polarized Grey	Polarized Brown	Polarized Blue	Polarized Green	Smoke
Luminous Transmittance	13%	16%	21%	18%	13%
Erythemal UBV	<0.1%	<0.1%	<0.1%	<0.1%	<0.1%
Near UVA	<0.008%	<0.1%	<0.1%	<0.1%	<0.1%
Red Factor	1.06	1.38	0.9	1.17	1.01
Violet Factor	0.8	0.5	0.9	0.5	0.8

Sunray Transmittance	Blue-Grey	Light Blue	Grey Flash Silver	Grey Anti Reflective	Clear Flash Silver	Clear
Luminous Transmittance	10%	38%	12%	12%	48%	90%
Erythemal UBV	<0.1%	<0.1%	<0.1%	<0.1%	<0.1%	<0.1%
Near UVA	<0.1%	<0.1%	<0.1%	<0.1%	2%	4.5%
Red Factor	1.24	0.88	1.16	1.27	1.12	1.01
Violet Factor	1.2	1.04	0.8	0.5	0.8	1.0

Grey Data - Lens Current Stock   •   White Data - On Request, Minimum Quantity Required

LENS CATEGORIES AND DESCRIPTIONS

Lens catergory	Description	Additional required information	Required symbol
0	Fashion spectacle – not sunglasses. Very low sunglare reduction. Some UV protection	None	None
1	Fashion spectacle – not sunglasses. Limited sunglare reduction. Some UV protection	Not suitable for driving at night	None
2	Sunglasses. Very low Medium sunglare reduction. Good UV protection	None	None
3	Sunglasses. Medium sunglare reduction. Good UV protection	None	None
4	Sunglasses-special purpose, Very high sunglare reduction. Good UV protection	Must not be used when driving

LENS TINT


GREY TINT
Perfect balance between comfort and protection, reducing light intensity and give superior accurate transmission of neutral colour; great to work for long hours on the sun.


BROWN TINT
This tint subtly enhances contrast, a technical lens which eliminates all reflection and glare giving superior clarity around water and the bush. For a work place with intense reflection and tiring glare of hazy conditions.


GREEN TINT
Accurate colour transmission, eliminates glare, prevents eyestrain. Perfect balance between comfort and protection, reduces light intensity, adapted use for city, forest and green or turf environmental activities.


BLUE TINT
Enhance relief, depth perception and contrasts of the environment and visual targets, allowing transition from sun to mist; developed to be soothing to the eyes the blue grey tint is recommended for hand/eye coordination work and pursuit.

POLAR-X
Traditionally used by fishermen to enable them to see past the surface glare and into the water to see the fish, polarized lenses are now available for outdoor workers.
 
So what is Polarization?
 
Whenever light strikes a reflective surface it becomes polarized. Unpolarised light is free to vibrate in any direction perpendicular to the direction it is traveling. However, when light strikes a horizontal reflecting surface, the vibration becomes restricted to one plane only. It is then said to be polarized.
 
A normal 99% UV sunglass lens will reduce all available light, therefore reducing the reflected glare. Unfortunately, this leaves the glare at the same relative level as the rest of the surroundings. Consequently, the annoying ‘masking effect’ of the reflected glare still remains.

INDOOR/OUTDOOR EYRES
A dual purpose clear mirrored lens is recommended for indoor or outdoor work. Comfortable in a wide variety of lighting conditions and reduces glare from artificial and natural light. Recommended for use at dusk and in low light and between frequent In and Out movement of a covered surface.

LENS COATING The Blue light component of the visible spectrum is not easily brought into focus by the naked eye resulting in a blurred image and visual fatigue. Moreover, blue light is responsible for the dazzling effects of strong sunlight and can lead to errors in visual perception and judgment. The filtering qualities of the lenses must be considered so that you have the correct type of lenses for your intended use; there is no point in buying lenses designed to work in the salt mine if you use them for everyday urban life. As a primary safety criteria, all EYRES lens are 99.9% protective of UV rays. They benefit from anti-reflective and flash mirror coatings, which eliminate the annoying reflections of concave and front side of the lens improving by reducing the transmission of light through it. The lenses are scratch resistant, treated with hard coating. This treatment ensures very high resistance to abrasion and scratching.

FRAME MATERIAL

EYRES frames are made to perform. They are injection-moulded from high velocity Grylamid TR-90 (Low Impact Category) and Polycarbonate (Medium Impact Category), highly advanced materials that are uniquely formulated for strength, flexibility and memory retention. Lightweight and extremely durable, they withstand harsh elements without breaking down or losing them finish providing structural integrity and stability.

EYRES frames are uniquely coated with our own exclusive and limited edition colors which render unique and attractive appearances. Deep, rich crystal colors naturally complement rare visual textures that are as pleasing to the eye as they are to the hand.