Umbra with Extreme Reductions
	If technically possible, Umbra coatings can be com-bined with each other and applied to both the front and back surfaces of the lens. In this way, glass lenses can be produced with a level of light reduction of up to 97.5% (front surface: Umbra 85, back surface: Umbra 85) for people who are particularly sensitive to light. However, lenses with light reduction >92% are not suitable for use in traffic! What tint is preferred is a matter of personal taste. It is therefore advisable to demonstrate the various levels of light reduction to patients in daylight.		Diese Seite auf Deutsch Back to previous page