The Effects of Refractive Error on the Detection and Identification of Simple and Complex Targets

Abstract

The effect of refractive error on the detection and identification of simple and complex targets was studied. Contrast sensitivity to sine-wave gratings of spatial frequencies from 0.61 to 22 cycles per degree with induced refractive errors of 0, +1, +2, +3, +4, +5, and +6 diopters were measured. Objective subject accommodation measurements were determined. The contrast needed to detect and identify Snellen letters and aircraft was also measured at the same levels of refractive error. In addition, some measurements were accomplished with reductions in the average luminance of 6 foot lamberts by factors of 10, 100, and 1000.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1980
Accession Number
ADA103374

Entities

People

  • Julie B. Cohen

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Airplanes
  • Contrast
  • Detection
  • Engineering
  • Eye Diseases
  • Frequency
  • Identification
  • Luminance
  • Measurement
  • Plastic Explosives
  • Polarizers
  • Security
  • Sensitivity
  • Sine Waves
  • Waves

Readers

  • Vision Science/Vision Psychology/Cognitive Neuroscience.