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Welding Helmet

 
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Welding helmets are headgear used when performing certain types of welding
Welding

Welding is a fabrication or sculpture process that joins materials, usually metals or thermoplastics, by causing coalescence . This is often done by melting the workpieces and adding a filler material to form a pool of molten material that cools to become a strong joint, with pressure sometimes used in conjunction with heat, or by itself,...
 to protect the eyes, face and neck from flash burn, ultraviolet light, sparks and heat. Most commonly used with arc welding
Arc welding

Arc welding uses a welding power supply to create an electric arc between an electrode and the base material to melt the metals at the welding point....
 processes such as shielded metal arc welding
Shielded metal arc welding

Shielded metal arc welding , also known as manual metal arc welding or informally as stick welding, is a manual arc welding process that uses a consumable electrode coated in flux to lay the weld....
 and gas metal arc welding
Gas metal arc welding

Gas metal arc welding , sometimes referred to by its subtypes metal inert gas welding or metal active gas welding, is a semi-automatic or automatic arc welding process in which a continuous and consumable wire electrode and a shielding gas are fed through a welding gun....
, welding helmets are necessary to prevent arc eye
Arc eye

Arc eye, also known as welder's flash, bake eyes, corneal flash burns, or flash burns, is a painful ocular condition sometimes experienced by welders who have failed to use adequate Welding helmet....
, a painful condition where the cornea
Cornea

The cornea is the transparency front part of the eye that covers the Iris , pupil, and anterior chamber. Together with the cilliary muscles, the cornea reflects light, and as a result helps the eye to dilate, accounting for approximately two-thirds of the eye's total optical power....
 is inflamed. Welding helmets can also prevent retina
Retina

The vertebrate retina is a light sensitive tissue lining the inner surface of the eye. The optics of the eye create an image of the visual world on the retina, which serves much the same function as the film in a camera....
 burns, which can lead to a loss of vision.






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Welding helmets are headgear used when performing certain types of welding
Welding

Welding is a fabrication or sculpture process that joins materials, usually metals or thermoplastics, by causing coalescence . This is often done by melting the workpieces and adding a filler material to form a pool of molten material that cools to become a strong joint, with pressure sometimes used in conjunction with heat, or by itself,...
 to protect the eyes, face and neck from flash burn, ultraviolet light, sparks and heat. Most commonly used with arc welding
Arc welding

Arc welding uses a welding power supply to create an electric arc between an electrode and the base material to melt the metals at the welding point....
 processes such as shielded metal arc welding
Shielded metal arc welding

Shielded metal arc welding , also known as manual metal arc welding or informally as stick welding, is a manual arc welding process that uses a consumable electrode coated in flux to lay the weld....
 and gas metal arc welding
Gas metal arc welding

Gas metal arc welding , sometimes referred to by its subtypes metal inert gas welding or metal active gas welding, is a semi-automatic or automatic arc welding process in which a continuous and consumable wire electrode and a shielding gas are fed through a welding gun....
, welding helmets are necessary to prevent arc eye
Arc eye

Arc eye, also known as welder's flash, bake eyes, corneal flash burns, or flash burns, is a painful ocular condition sometimes experienced by welders who have failed to use adequate Welding helmet....
, a painful condition where the cornea
Cornea

The cornea is the transparency front part of the eye that covers the Iris , pupil, and anterior chamber. Together with the cilliary muscles, the cornea reflects light, and as a result helps the eye to dilate, accounting for approximately two-thirds of the eye's total optical power....
 is inflamed. Welding helmets can also prevent retina
Retina

The vertebrate retina is a light sensitive tissue lining the inner surface of the eye. The optics of the eye create an image of the visual world on the retina, which serves much the same function as the film in a camera....
 burns, which can lead to a loss of vision. Both conditions are caused by unprotected exposure to the highly-concentrated UV rays emitted by the welding arc (which can also damage uncovered skin, similar to a sunburn).

All welding helmets include a small window, called a lens shade, through which the welder looks at the weld. In older helmets, the window can be made of darkly tinted glass, or perhaps a pair of polarized lenses. In more modern helmet designs, transparent material that darkens automatically when exposed to the flare of a welding arc are more common. Either type, however, is susceptible to damages such as cracks that can compromise the protection from ultraviolet rays. In addition to the lens shade, the helmet has a shroud around the face to protect it from hot metal sparks generated by the arc. Some older models have a leather covering protecting the neck and shoulders as well.