Abstract
Visually evoked cortical responses and visual acuity were investigated as a function of changes in accommodation (accommodation stimuli of 0, −1.25, −2.50 and −5.0 diopters) and convergence (convergence stimuli of 0, −4, −8 and −16 prism diopters). The effects of convergence on both evoked response amplitude and visual acuity depended on the accommodative stimulus used: increasing the convergence stimulus from 0 to −16 prism diopters resulted in a reduction in both measures when the 0 diopter accommodative stimulus was used, whereas it resulted in an enhancement of both measures when the −5 diopter accommodative stimulus was used. Evoked potential amplitude was greatest and visual acuity best when the stimuli to accommodate and converge were associated; that is, simulated the same viewing distance. Evoked response amplitude appeared to reflect the degree to which subjects accommodated the different experimental conditions since response amplitude was positively correlated with visual acuity. The results were discussed in terms of the physiological and functional relationship between convergence and accommodation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Electroencephalography and Clinical Neurophysiology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
