Related Experiment Video
Updated: May 9, 2026

07:48
Eye Tracking During A Complex Aviation Task For Insights Into Information Processing
Published on: April 4, 2025
Military aircrew eyewear survey: operational issues
José E Capó-Aponte1, David J Hilber, Thomas G Urosevich
1U.S. Army Aeromedical Research Laboratory, Fort Rucker, AL, USA. jose.e.capoaponte.mil@mail.mil
Aviation, Space, and Environmental Medicine
|August 10, 2013
Summary
Current U.S. Army aircrew eyewear presents significant operational deficiencies, including discomfort and restricted fields of view, impacting mission readiness. Improved, aviation-compatible protective eyewear is urgently needed for aircrew safety and performance.
Area of Science:
- Military Aviation
- Ophthalmology
- Human Factors Engineering
Background:
- U.S. Army aircrew operate in demanding environments requiring specialized protective eyewear.
- Current U.S. Army-issue aircrew eyewear may have mission-related operational issues.
Purpose of the Study:
- To assess operational issues and mission needs related to current U.S. Army aircrew eyewear.
- To identify deficiencies in existing aircrew spectacles and determine aircrew desires for improved eye protection.
Main Methods:
- An anonymous online survey was distributed to 976 U.S. Army aircrew personnel.
- Data collected focused on operational problems, comfort, field of view, and compatibility with flight systems.
Main Results:
- Nearly 50% of aircrew reported dissatisfaction with the HGU-4/P Aviator spectacles due to discomfort and fit.
- Restricted field of view (FOV) in HGU-4/P and Modified HGU-4/P Apache spectacles adversely affected performance for 16% and 79% respectively.
- 46% experienced eye discomfort from wind and dust; over 82% desired improved spectacles and 73% aviation-compatible protective eyewear.
Conclusions:
- The HGU-4/P Aviator and Modified HGU-4/P Apache spectacles exhibit significant operational deficiencies and compatibility issues.
- These deficiencies lead to poor wear compliance and unauthorized modifications, creating safety and readiness concerns.
- There is a clear need for military combat eye protection specifically designed for compatibility with flight systems.
Related Concept Videos
Accessory Structures of the Eye
Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
Survey Safety
Surveying near highways, rough terrain, or power lines involves significant risks. Working along highways is particularly dangerous and requires the use of warning signs and flagmen. It is safest to avoid working directly on roads and use offsets whenever possible. When highway work is unavoidable, it must follow all safety guidelines. Surveyors should wear bright clothing, such as orange reflective vests, to ensure visibility to motorists, coworkers, and hunters. In construction zones, wearing...
Ophthalmic Drug Delivery Systems
Ophthalmic drug delivery faces major limitations due to poor absorption across the corneal membrane. This process is primarily driven by diffusion and is influenced by two main factors: the physicochemical properties of the drug and tear drainage. Most ophthalmic drugs, such as pilocarpine, epinephrine, atropine, and local anesthetics, are weak bases. They are typically formulated at an acidic pH to enhance chemical stability. However, this leads to high ionization, reducing their ability to...

