ZEISS Vision is among leading manufacturers of ophthalmic lenses.
With its constant technological development, ZEISS creates and advances the future of optics. Grossoptic is a long standing distributor of ZEISS ophthalmic lenses.
Nidek is a Japanese company operating on the global market for 40 years already.
It manufactures ophthalmological equipment – diagnostic devices and automatic machines for glass processing. As a Nidek distributor, Grossoptic has been offering its customers top quality equipment for 14 years already.
Centrostyle is an Italian company operating for over 40 years on the global market, with its products present on all 5 continents.
Centrostyle offers innovative high quality optical products and over its wide network of distributors, it supplies optician’s shops throughout the world.
Its global success and a decades-long presence result from high quality, wide product range and innovative solutions.
As a regional partner, Grossoptic has been bringing Centrostyle products to its customers for 25 years.
If when ordering RX lenses, individual parameters are also provided, they will be taken into account during their manufacturing and the user will get lenses that will provide excellent vision.
The back vertex distance (BVD) is the distance of the eye from the inner surface of the lens.
The average value is 12mm.
Pantoscopic angle
The pantoscopic angle is the angle of inclination of the frame relative to the vertical plane.
The average value is 7°.
Reading distance
The distance by which reading differs for digital and printed media.
On average, this is from 30cm to 40cm.
Frame curvature angle
The frame curvature angle depends on the model of the frame. It is measured using the card for determination of the curvature angle.
The average parameter is 5°.
Pupillary distance
The pupillary distance can differ for the left and the right eye, so it is necessary to measure the monocular distance separately for the left and the right eye.
Fitting height
Fitting height is the distance from the position of the pupillary center marked on the form, to the farthest point on the ocular.
This measured value must be larger than the minimum fitting height given for a specific model of progressive lens and it is the criterion for selecting the model of progressive lens and accepting a frame as being appropriate for mounting.
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