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Sun Lenses
Sun Lenses reduce the amount of visible light reaching the eye and must perform in a manner consistent with their intended use. Colour, filter category, light transmission and UV protection are distinct characteristics, which should be checked on the actual product.
Dark does not automatically mean protective
Colour intensity primarily describes how much visible light passes through the lens; protection against UV radiation, on the other hand, depends on the declared and certified performance specifications. For this reason, it is not enough to judge a lens by its appearance alone. At Isolani Optical Centres, we check the origin, markings and technical specifications of the selected lens.
Filter categories from 0 to 4
The categories classify sunglasses according to their visible light transmission: from the very light lenses of category 0 to the very dark ones of category 4. The choice depends on the environment and the activity. Category 4 lenses are designed for conditions of extreme brightness and are not suitable for driving.
Ordinary Sun Lenses are not designed for direct observation of the sun or a solar eclipse: specific devices that comply with the relevant regulations are required for that purpose.
Polarised, photochromic and mirrored
Polarised lenses can reduce annoying glare from surfaces such as water and tarmac, without eliminating it in every situation. The photochromic They alter light absorption depending on the conditions under which they are activated; the mirrored coating alters part of the reflected light and the appearance of the lens. Each technology has specific limitations and areas of application.
Even in sizes, when needed
Many Sun Lenses can be made to order, subject to the frame, curvature, power and chosen technology. The Behavioural Centring It helps to ensure the design remains consistent even on wide or wraparound frames.
How we choose the lens
Let’s start with real-world use: driving, city life, the seaside, the mountains, sport, or individual sensitivity to brightness. Let’s compare light transmission, colour, colour rendering, polarisation and compatibility with the prescription, explaining what the lens offers without turning a technical feature into a universal promise.
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The information on this page is provided for information purposes only and relates to the field of optics and commerce. It does not contain any medical, clinical or diagnostic content.