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Assessment of a Prototype Apache Flight Eyewear.

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Apache pilots reported dissatisfaction with current aviator spectacles and Helmet Display Units (HDUs). This study found no significant field of view differences between current and modified frames, suggesting no eyewear is optimal for HDU integration.

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Area of Science:

  • Aviation physiology and human factors research.
  • Ophthalmology and vision science.
  • Aerospace medicine and engineering.

Background:

  • Apache pilots requiring vision correction use modified aviator spectacles.
  • A recent survey indicated dissatisfaction with the field of view (FOV) of current spectacles when using Helmet Display Units (HDUs).
  • A modified Air Force flight frame was developed to address FOV limitations.

Purpose of the Study:

  • To evaluate and compare the FOV provided by the current Apache flight frame versus a modified flight frame.
  • To assess the impact of different eyewear conditions on pilot FOV during HDU use.

Main Methods:

  • Twenty-one Apache pilots participated in the study.
  • FOV was assessed under three conditions: current Apache frame, modified Apache frame, and no frame.
  • The primary outcome measure was the total FOV across four defined quadrants.

Main Results:

  • No statistically significant differences in FOV were observed between the current and modified Apache flight frames.
  • Significant differences in FOV were found between wearing no frame and wearing either of the tested frames.
  • These differences were consistent across both current and new Apache helmet configurations.

Conclusions:

  • Neither the current nor the modified Apache flight frames significantly improved FOV compared to each other.
  • Wearing no eyewear appears to be optimal for integrating HDU devices.
  • Future research should explore multifocal contact lenses for Apache aviators given advancements in contact lens technology.