Compromises in the visual field with the M43 aviation mask

Area of Science:

• Aviation physiology
• Ophthalmology
• Human factors engineering

Background:

• Aviators in the AH-64 Apache helicopter utilize the M43 protective mask.
• Peripheral vision is critical for situational awareness and flight safety in aviation.
• The impact of protective masks on aviator visual fields requires evaluation.

Purpose of the Study:

• To evaluate the effect of the M43 protective mask on aviator peripheral vision.
• To quantify changes in visual field sensitivity and extent while wearing the mask.

Main Methods:

• Peripheral vision was assessed using a Humphrey Visual Field Analyzer.
• Visual field sensitivity was measured with and without the M43 mask.
• Data were analyzed using Dicon's Fieldview software.

Main Results:

• Monocular visual fields were reduced, particularly in superior and nasal areas, when wearing the mask.
• Overall visual field size was not significantly reduced with both eyes open.
• Visual field quality was degraded, and the central binocular fusion field was restricted to 30 degrees.

Conclusions:

• The M43 protective mask significantly impairs peripheral vision quality and binocular function in AH-64 Apache aviators.
• These visual field deficits may impact aviator performance and safety.
• Further research into mask design or alternative solutions is warranted.