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Corneal lens goggles and visual space perception

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Abstract

Night vision goggles are head-mounted, unity-power systems designed to allow the human operator to see and operate at night. Field experience and experimental studies have revealed many drawbacks in conventional designs that impair performance. One major drawback is the poor space perception provided by the goggles. The Hadani et al. [ J. Opt. Soc. Am. 70, 60– 65 ( 1980)] model for space perception attributes this drawback to the fact that the conventional designs shift the observer's effective center of perspective ∼15 cm ahead and also predicts the resulting impairments. An innovative redesign is presented in this paper—the corneal lens goggles (CLG)—which brings the effective center of perspective of the goggles to coincide with the center of perspective of the eyes, thus annulling the optical length of the device. Qualitative and quantitative laboratory studies have compared the performance of the CLG and conventional goggles (type AN/PVS-5). These studies have revealed better visual and visual-motor performance with the CLG. The implications to optical design of the Hadani et al. theory and the CLG concept are discussed.

© 1991 Optical Society of America

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