The Relationship between Visual Acuity and Illumination in the Fly, Lucilia sericata
Open Access
- 1 February 1978
- journal article
- research article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung C
- Vol. 33 (1-2) , 139-143
- https://doi.org/10.1515/znc-1978-1-225
Abstract
The variation in visual acuity with illumination has been studied by monitoring the extracellular response of direction sensitive motion detecting neurons to a drifting sine wave grating displayed upon an oscilloscope spreen. Acuity reaches a maximum value of 0.46 cycles/degree at luminances above 1.0 cd/m2 and decreases gradually over a 3.8 log unit attenuation in intensity to a minimum value of 0.05 cycles/degree. The results have been compared with theoretical acuity curves for the coupound eye with various dark adaptation mechanisms. The analysis indicates that a major strategy of dark adaptation in the fly is a process involving intensity-dependent neural summation of signals from photoreceptors having different visual axes.Keywords
This publication has 3 references indexed in Scilit:
- Spatial information capacity of compound eyesJournal of Comparative Physiology A, 1977
- Acuity of compound eyes: Physical limitations and designJournal of Comparative Physiology A, 1977
- Motion detection by interneurons of optic lobes and brain of the flies Calliphora phaenicia and Musca domestica.Journal of Neurophysiology, 1968