628 results about "Eye protecting" patented technology

A polarized optical element is disclosed comprising an upper portion and a lower portion defined at opposite parts with respect to a median line passing through the geometric center of the optical element, wherein: a) in the upper portion and at a distance of at least 10 mm from the median line the factor of luminous transmittance is between 3% and 20%; b) in the lower portion and at a distance of at least 10 mm from the median line the factor of luminous transmittance is between 15% and 65%; c) the ratio of the luminous transmittance measured in the lower portion at a distance of at least 10 mm below the median line and the luminous transmittance measured in the upper portion at a distance of at least 10 mm above the median line is not lower than 1.5; d) the colors of the upper and lower portions of the optical element are such that: d1) the absolute value of the difference between the value of the colorimetric coordinate a* of the upper portion measured at a point located 10 mm above the median line and the value of the colorimetric coordinate a* of the lower portion measured at a point located 10 mm below the median line is comprised between 0 and 60, d2) the absolute value of the difference between the value of the colorimetric coordinate b* of the upper portion measured at a point located 10 mm above the median line and the value of the colorimetric coordinate b* of the lower portion measured at a point located 10 mm below the median line is comprised between 0 and 60, e) the degree of polarization of the optical element is uniform both along a vertical and along a horizontal direction and is equal to at least 45% as measured according to European Standard EN 1836.

An optical element is disclosed comprising at least one transparent eye-protecting portion comprising a plastic material, preferably having a hardness within a range of about 40 Shore A to about 77 Shore D, as measured according to ASTM Standard D2240, and an elongation at break within a range of about 200% to about 700%, as measured according to ASTM Standard D638.

A protective face mask comprising:an eye-protecting shield made essentially from a plastics material, the eye-protecting shield being dimensioned to cover at least the eye portions of a human wearer, the eye-protecting shield having a perimeter defining a first surface facing the wearer's face, and a second surface facing away from the wearer's face;an adhesive forming an adhesive strip attached to the first surface of the eye-protecting shield for providing a substantially watertight and releasable sealing engagement between at least a portion of the perimeter forming an upper edge of the face mask and at least a portion of the skin of the wearer's face, whereinthe upper part of the perimeter of the mask is provided with a continuous layer of adhesive along the perimeter, and the lower part of the perimeter of the mask is free of adhesive,the lower part of the perimeter forms a bottom edge of the mask being provided with at least one part forming a projection offset from the centre line of the mask, and whereinthe mask extends along the contour of the wearer's face from the forehead to cheekbones and the lower perimeter thereof extends above the mouthprovides a comfortable and flexible mask without the need for straps, elastic bands or side bars, avoids pressure on the skin in the contact zone, allows free eye movement and airflow and minimizes the formation of dew.