Bifocal lenses are designed for wearers needing two corrections. For example, one for near vision and one for distant vision, with the upper part of the lens correcting for distant vision and the lower part correcting for near vision. In these cases, BBGR offers bifocals, with curved and round segments in both organic and mineral materials.
These lenses can be prescribed for presbyopes, allowing them to recover their prismatic balance in near vision.
Certain specific visual deficiencies cannot be corrected by traditional equipment. In these cases, BBGR offers what are known as ‘special’ lenses.
Prismatic compensation bifocals: these lenses can be prescribed for people with presbytia to enable them to recover their prismatic balance in near vision.
Special toric multifocals: these lenses are designed for ametropia patients with or without presbytia who need different astigmatic correction in both DV and NV or who are unable to wear bifocals or progressive lenses, but who do, however, need this double correction in a single lens. The wearer thus acquires identical comfort in long and short distance vision with a single item of equipment.
Prismatic lenses with polymerised applications: these are recommended for people with or without presbytia with a phoria or strabism in need of correction. Their main advantage is to present prismatic corrections which differentiate between DV, medium distance and NV.
Non-standard solutions for presbyopes: these lenses are adapted to meet specific needs. They offer multiple possibilities for wearers wishing to favour certain zones of vision. These are mostly NV, although with very broad DV, dominant use of intermediary vision and NV with clear, but only occasional use of DV, etc.
These lenses can also meet to the needs of the independent professional when no standard lens is really suitable.
They do not fit into standard categories, the special BBGR lenses are individually made and treated with particular attention and care from the time of ordering through to manufacture.