The principle of adaptive independence regarding middle- and short-wave cones was tested by Stiles "Two-colour threshold technique". Using yellow background light, the sensitivity of middle-wave cones was lowered and the shift in higher sensitivity of middle-cones to short-wave cones to blue test flashes was found to occur at a background radiance of 0.03 W/m^2sr .
Inhaltsverzeichnis (Table of Contents)
- Introduction
- Methods
- Apparatus
- Procedure
- Results
- Discussion
- Conclusion
- References
Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)
This report explores the principle of adaptive independence within the visual system by isolating different cone types and observing their responses to light stimuli. The study aims to test how the sensitivity of middle- and short-wave cones is affected by adaptation to different wavelengths of light.
- Adaptive independence of cone types
- Threshold sensitivity of middle- and short-wave cones
- Influence of background light intensity on cone sensitivity
- Application of Weber's law to visual perception
- Experimental methods for isolating cone responses
Zusammenfassung der Kapitel (Chapter Summaries)
The Introduction discusses the principles of neural coding in vision, focusing on the concept of adaptive independence. The Methods section outlines the experimental procedure, detailing the use of a two-color increment-threshold technique with yellow background light and blue or green test flashes. The Results chapter presents the findings, highlighting the shift in sensitivity from middle- to short-wave cones at a specific background radiance. The Discussion analyzes these findings in relation to Weber's law and the principle of adaptive independence, considering potential explanations for discrepancies from expected outcomes.
Schlüsselwörter (Keywords)
The key terms in this report include adaptive independence, cone types, visual thresholds, background radiance, Weber's law, and the two-color increment-threshold technique. These concepts are central to understanding the mechanisms by which the visual system adapts to different light conditions and processes visual information.
- Quote paper
- Laura Imperatori (Author), 2013, Visual Thresholds and Adaptation, Munich, GRIN Verlag, https://www.grin.com/document/274743
