Optical Filters ONIRS: ONIRS treats Sunglasses. Upon customer requests, through the release of optometrist data, ONIRS can also provide Filters that include Mono-focal or Bi-focal Type View Correction. ONIRS uses only High Quality Certified Optical Filters (1st Class – UV 400), in CR39 or Nylon, purchased exclusively by Italian Companies.

Filter: It indicates an optical lens in its property to stop a given type and percentage of light. If not specified, the filter refers to sunlight.

Solid filter: It indicates a normal lens Uniform filter, without mirroring or other optical properties.

Cat. Filter

             Type of Filter

Transm. Light



Minimally obscured lenses

    80 – 100%

    Closed places, cloudy


Slightly darkened lenses

    43 – 79%

    Sunlight attenuated


Moderately obscured lenses

    18 – 42%

    Average sunlight


Dark lenses

    8 – 17%

    Intense sunlight


Very dark lenses

    3 – 7%

    Extremely intense solar light

    (high mountains, sea, snow)

(*) Category 4 filters lenses are not suitable for driving

Shaded Filter: It indicates a lens normal filter NOT uniform, without mirroring. A Gradient Filter is usually neutral + one color.

Mirror Filter: It indicates a Solid Lens on which a reflective film is applied. The color and filter category and mirror type combinations are invariable formulations established by the manufacturer.

Polarized Filter: It Indicates a lens that has the property of regularizing brightness and attenuating reflections.

Photochromic Filter: It indicates a lens that has the ability to vary quickly in intensity according to the brightness.


ONIRS sunglasses system is characterized by an elastic and flexible lens-holder band, which has an annular housing within which the lens is permanently adapted. To disassemble it, just slightly widen the belt by pushing the lens until the edge is undermined. The Reassembly is just as fast and just Insert the edges of the lens in the inner annular space of the flexible band, starting from the curve adjacent to the bridge / nose. Subsequently it will be sufficient to check the symmetry of the lenses, orienting them and making them settle keeping the frame still from the nose / bridge. Within a limited range, a custom lens orientation can be configured.