ORIENTATION-SPECIFIC EFFECTS OF PATTERNS OF ADAPTING LIGHT ON VISUAL ACUITY

INSPECTION OF A PATTERN OF HORIZONTAL, VERTICAL, OR OBLIQUE LINES DIFFERENTIALLY AFFECTS THE VISUAL ACUITY FOR TEST GRATINGS AS A FUNCTION OF THEIR ORIENTATION. AFTER A HORIZONTAL GRATING IS VIEWED FOR 1 SEC. OR LONGER, THE RESOLUTION THRESHOLD FOR HORIZONTAL CONTOURS IS GREATER THAN THE THRESHOLD FOR THE IDENTIFICATION OF VERTICAL AND OBLIQUELY ORIENTED CONTOURS. CONVERSELY, PROLONGED VIEWING OF VERTICAL CONTOURS RAISES THE THRESHOLD FOR THE IDENTIFICATION OF VERTICAL LINES ABOVE THOSE FOR OTHER ORIENTATIONS. SIMILAR RESULTS ARE FOUND FOLLOWING ADAPTING EXPOSURES TO LEFT-AND-RIGHT-OBLIQUE CONTOURS. THE DIFFERENTIAL MASKING EFFECTS ARE SYSTEMATIC FUNCTIONS OF THE DURATION OF EXPOSURE TO THE LIGHT-AND-DARK ADAPTING PATTERN./RRL/A/

• Supplemental Notes:
  • Vol 58, pp 13-18, 6 FIG, 2 TAB, 4 REF
• Authors:
  • Gilinsky, A S
• Publication Date: 1969-1

Media Info

• Serial:
  • Optical Society America Journal

Subject/Index Terms

• TRT Terms: Contours; Eye; Light; Perception; Psychological adaptation; Testing; Vision
• Uncontrolled Terms: Resolution
• Old TRIS Terms: Lines; Thresholds (Perception)
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00220156
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS
• Created Date: Sep 22 1994 12:00AM