Field evaluation of polycarbonate versus conventional safety glasses

Area of Science:

• Ophthalmology
• Trauma Surgery
• Materials Science

Background:

• Gunshot injuries are a leading cause of severe eye trauma with poor visual outcomes.
• Hunting accidents represent a significant portion of these preventable eye injuries.
• The efficacy of protective eyewear in mitigating shotgun-related ocular trauma is not well-established.

Purpose of the Study:

• To evaluate the protective capabilities of different safety lens materials against shotgun impacts.
• To determine the effectiveness of safety glasses in preventing or reducing ocular damage from hunting-related gunshot injuries.

Main Methods:

• A Remington automatic shotgun was fired at mannequin heads equipped with four types of safety lenses (polycarbonate, heat-treated, chemically treated, CR39).
• Ballistic impacts were tested at two distances: 10 yards and 30 yards.
• Visual protection levels afforded by each lens type were assessed.

Main Results:

• At 10 yards, only polycarbonate lenses offered any degree of protection.
• At 30 yards, polycarbonate and heat-treated lenses demonstrated superior protection compared to chemically treated and CR39 lenses.
• Chemically treated and CR39 lenses provided significantly less protection against shotgun impacts.

Conclusions:

• Polycarbonate safety glasses are recommended for hunters using shotguns, particularly in low-visibility conditions.
• Wearing polycarbonate eyewear can significantly minimize the risk of devastating ocular gunshot injuries.
• Combined use of safety glasses and "hunter's orange" clothing is advised for enhanced safety.