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Face Shields: benefits and risks during the COVID-19 crisis

Face shields are personal protective equipment (PPE) new devices used by various professionals (e.g., medical, dental, and veterinary) to protect both the face and related mucous membranes (eyes, nose, and mouth) as well from bodily fluid splashes, sprays, and splatter. Face shields are classed as additional personal protective equipment because they have been typically used in combination with other personal protective equipment. Although face shields have millions of potential users, rules for their use differ between governmental bodies and professions, and there is little research on their overall effectiveness. When you wear a face shield, you protect others as well as yourself. Protection works best when everyone wears one.

Proper Use of The Face Shield 

The indications for usage determine the proper application of a face shield. Face shields are recognised as an alternative to goggles for preventing infectious agent contamination. Indirectly vented goggles that are appropriately fitted provide the most dependable, practical, and use eye protection against splashes. Though the combination of a face shield and goggles has been advocated for use during invasive surgical operations, any extra protection provided to the eyes when protective eyewear is coupled with a face shield has not been fully explored. Some types of protective eyewear paired with a face shield can reduce visual clarity and limit peripheral vision to some extent. Therefore, you must consider these effects before usage of face shields. It's also been claimed that goggles fog up more than face shields, so you may be better off using the latter. 

Ergonomic Design

You may find visors of varying length, including a mid-face half facepiece; you also find a full facepiece covering the chin and one with size going till face/neck covering the anterior neck area. Most visors curve around the face and are available in various widths; more giant projections provide additional special protection. Some disposable medical or surgical face masks include an integrated, flimsy plastic visor and an anti-fogging mechanism attached to the top of the cover. The large respiratory droplets can be blocked by the large plastic panel, which descends from the forehead of the face shield extending to the chin. It helps in preventing the virus from reaching and infecting you quickly.

Protection From Germs

These face shields are made using the best technology and successfully eliminate germs and bacteria from surfaces. It can effectively decrease the transmission of potentially disease-causing germs.

Face shields are personal protective equipment (PPE) that are frequently employed as a barrier for infection control by many workers. There is presently no standard for protecting the face and eyes from biological threats, and we must address this deficiency as soon as feasible. Face shields should not be utilised as a stand-alone face or eye protection due to the absence of an excellent peripheral facial seal allowing for aerosol penetration. Instead, they should use them with other PPE (protective facemasks, goggles, etc.). Given the scarcity of data on the proper use of face shields for infection control, a scientifically solid study on this type of PPE is required.

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