Choosing between organic or mineral
The choice of material, whether organic (plastic) or mineral (glass), will depend on wearers’ visual correction and their activities (leisure, sport, etc.).
|BBGR offers each type of lens in the following materials:
organic: allows for the creation of light and impact-resistant lenses. According to the various kinds of organic material used, lenses can also be very thin. Moreover, they can be used in all kinds of frames.
mineral: mineral lenses are very hard and do not scratch easily, making maintenance extremely easy. This resilience allows them to be worn in extreme conditions. But they are made of glass, and are therefore more fragile. They are also heavier, which makes them less comfortable to wear.
Choosing the right index
The effect of index, constringence, UV blocking and mass are the principal factors which must be taken into account when choosing spectacles.
BBGR offers a diverse range of integrated solutions to satisfy your most demanding customers.
1.5 index: the benefits of organic lenses at an attractive price
The 1.5 material offers all the added advantages of organic lenses when compared with the mineral alternative, such as light weight, high constringency and numerous tinting possibilities – all at an attractive price. The very wide range available allows for correction of most ametropic conditions, but it is also particularly recommended for weak corrections.
High indices: reference organic material
High indices make it possible to obtain thinner and lighter lenses than organic 1.5.
They also offer better protection against UV.
Thanks to its high shock-resistance and its lightness, the polycarbonate “Tilium®” is particularly appreciated by children and sporty people. It is the lightest of materials: with a density of 1.20 g/cm3. The very slim “Tilium®” is a high index lens: 1.59.
The 1.6 MR8 is the benchmark organic material, combining exceptional optical quality, optimised slimness, extreme light weight and total UV protection. Furthermore, it is well-known for being particularly easy to work, which opticians greatly appreciate. The MR8 is ideal for use with pierced frames.
Ultra-high indices: increased comfort and aesthetics for all corrections
The ultra-high 1.67 and 1.74 indices offer exceptional performance in termes of slimness and flatness.
Index 1.74: a very high-end product. It's the flattest and thinnest of all organic indices. It has excellent UV blocking ability, incorporating a selective filter at above 400 nanometres. Offering aesthetics and comfort at all strengths, it is ideal for strong corrections.