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ZEISS FOR EYE CARE PROFESSIONALS
Special Filter Lenses by ZEISS
Special filter lenses absorb specific part of the visible spectrum.
With special filter, some of them also known as cut-off filters, ZEISS rounds off its range of filter lenses. Special filter lenses often enhance contrast and reduce the time required to adapt to different light conditions.
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Increased contrast sensitivity, acuity, and twilight acuity
Special Filter F 451-452
The blue filter lens F 451 and the dark blue filter lens F 452 can be used to achieve a marked increase in contrast sensitivity, acuity, and twilight acuity. They absorb selectively in the wavelength range between 550 and 650nm (less than 20% transmission in this range) and therefore relatively let pass more light in the blue light wavelength range.
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Increased visual comfort
Special Filter F 60-90 and F 540-580
The special filter lenses F 60, F 80 and F 90 and F 540, F 560 and F 580 have been optimised to absorb a part of the visible shortwave spectrum.
Filter categories
Category as per DIN EN ISO 8980-3
|
Solar UV absorption
|
Suitability for traffic and driving at night and in twilight as per DIN EN ISO 14889
|
|
---|---|---|---|
F 451/452
|
Category 2 (57-82%)
|
100% solar UV-B absorption
|
Not suitable for use in traffic!
|
F 60
|
Category 2 (57-82%)
|
100% solar UV-B absorption, 100% solar UV-A absorption
|
Not suitable for use in traffic!
|
F80 F90
|
Category 3 (82-92%)
|
100% solar UV-B absorption, 100% solar UV-A absorption
|
Not suitable for use in traffic!
|
F 540 F 560
|
Category 1 (20-57%)
|
100% solar UV-B absorption, 100% solar UV-A absorption
|
Not suitable for use in traffic!
|
F 580
|
Category 2 (57-82%)
|
100% solar UV-B absorption, 100% solar UV-A absorption
|
Not suitable for use in traffic!
|
Tips for the optician
- Every Special filter lens with the refractive index 1.5 is also available as the special filter lenses F 451 and F 452
- Every lens with the refractive index 1.5 is also available as F 60, F 80, F 90 and F 540, F 560, F 580