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Updated: Jun 19, 2026
07:06
Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
Published on: March 29, 2022
The effects of visual acuity on target discrimination and shooting performance
Brian C Hatch1, David J Hilber, James B Elledge
1Tri-Service Vision Conservation and Readiness Program, U.S. Army Center for Health Promotion and Preventive Medicine, Aberdeen Proving Ground/EA, Maryland, USA. brian.hatch@med.navy.mil
Summary
Better vision significantly improves marksmanship and target identification. The study supports military vision standards, with 20/40 vision being a critical threshold for performance.
Area of Science:
- Ophthalmology
- Military Science
- Human Performance
Background:
- Visual acuity is crucial for tasks requiring precise aiming and identification.
- Assessing the impact of varying visual acuity on performance in simulated combat scenarios is essential for military readiness.
Purpose of the Study:
- To investigate the relationship between visual acuity and performance in target discrimination and marksmanship.
- To provide evidence-based recommendations for military vision standards.
Main Methods:
- A randomized, single-blind, repeated measures study was conducted.
- Participants' visual acuity was manipulated using corrective lenses to achieve five distinct levels.
- Subjects engaged in simulated marksmanship and target discrimination tasks at various distances.
Main Results:
- Significantly higher hit rates were observed for subjects with visual acuity better than 0.2 LogMAR compared to those with 0.7 LogMAR or worse.
- Correct target identification was significantly more likely in subjects with visual acuity between -0.2 and 0.6 LogMAR than in those with 0.7 LogMAR or worse.
- Performance declined notably in the 0.3 to 0.4 LogMAR range, indicating a transition zone.
Conclusions:
- Visual acuity is a significant determinant of marksmanship and target discrimination.
- The findings support the validity of the current U.S. military vision readiness standard of 20/40 or better.
- Mandating corrective eyewear to meet this standard is recommended to optimize visual performance for military personnel.
