Technique for simulating G-induced tunnel vision

Area of Science:

• Aerospace Medicine
• Human Physiology
• Ophthalmology

Background:

• Human centrifuge training is crucial for G-force acclimatization in aviation and spaceflight.
• Understanding the physiological endpoints of G-force exposure, such as greyout and tunnel vision, is vital for safety.

Purpose of the Study:

• To describe a straightforward method for trainees to comprehend the specific endpoint of centrifuge stress exposure.
• To enhance the training effectiveness on human centrifuges.

Main Methods:

• The technique involves the manual induction of elevated intraocular pressure.
• This increase in intraocular pressure simulates the physiological effects of G-force exposure.

Main Results:

• Induced intraocular pressure leads to reduced retinal perfusion.
• This reduction in blood flow to the retina causes the onset of greyout and tunnel vision phenomena.

Conclusions:

• This technique provides a practical, self-induced method for trainees to experience and understand centrifuge stress endpoints.
• It offers a valuable tool for improving human centrifuge training protocols and safety.