1. (a) General information.

   1. (1) The word "approved" refers to approval by the Texas Department of Health, i.e., the agency having jurisdiction over the specific requirement.
   2. (2) The use of the word "shall" indicates a mandatory requirement. The word "should" indicates a recommendation.

2. (b) Specific definitions.

   1. (1) Bridge size--The distance between lenses on the nose side of each eye, expressed in millimeters.
   2. (2) Contaminant--A harmful material that is foreign to the normal atmosphere.
   3. (3) Cover plate--A removable pane of colorless glass, plastic-coated glass, or plastic that covers the filter plate and protects it from damage.
   4. (4) Dust--Finely divided solid particles generated by processing (including handling, crushing, grinding, or pulverizing) materials such as rock, metal, wood, and grain.
   5. (5) Eyepiece--A gastight transparent window in a gas-mask facepiece through which the wearer may see.
   6. (6) Eye size--A measurement expressed in millimeters and denoting the size of the lens-holding section of an eye frame.
   7. (7) Face shield--A device worn in front of the eyes and a portion of or all of the face, whose predominant function is protection of the eyes and face.
   8. (8) Filter plate--Removable pane in the window that absorbs varying proportions of the ultraviolet, visible, and infrared rays according to the composition and density of the plate.
   9. (9) Fume--Solid dispersoids formed by condensation of vapors, such as those from heated metals.
   10. (10) Goggles--A device, with contour-shaped eyecups or facial contact with glass or plastic lenses, worn over the eyes and held in place by a headband for the protection of the eyes and eye sockets.
   11. (11) Hand shield--A device, usually held in the hand or supported on the wearer's chest, designed to protect the eyes and face during welding operations.
   12. (12) Helmet--A device that is worn by a person to shield the eyes, face, neck, and other parts of the head.
   13. (13) Lens--The transparent glass or plastic device through which the wearer of the protective goggles or spectacles sees, and which provides protection to the eyes against flying objects, glare, or injurious radiation, or a combination of these hazards.
   14. (14) Lens, corrective--A lens ground to the wearer's individual corrective prescription.
   15. (15) Mist--Suspended liquid droplets generated by breaking up a liquid into a dispersed state.
   16. (16) Particulate matter--Matter occurring in the form of minute separate particles, such as dust, fume, mist, and fog; a dispersoid.
   17. (17) Protector--A device that provides head, face, and eye protection against the hazards of processes encountered in employment or in the natural environment.
   18. (18) Shield--A device to be held in the hand, or supported without the aid of the operator, whose predominant function is protection of the eyes and face.
   19. (19) Spectacle--A device patterned after conventional-type spectacle eyewear but of more substantial construction, either with or without side shields, and with clear, impact-resistant filter or corrective lenses of glass or plastic.

Source Note:The provisions of this §295.143 adopted to be effective February 22, 1993, 18 TexReg 848.