Effects of temporal frequency on the sweep pattern visual evoked response acuity.
- Author:
Rui-Jue LIU
1
;
Jie-Min CHEN
;
Wen-Tao XIA
;
Li-Hua FAN
;
Guang-You ZHU
Author Information
1. Shanghai Key Laboratory of Forensic Medicine, Institute of Forensic Science, Ministry of Justice, Shanghai 200063, PR China.
- Publication Type:Journal Article
- MeSH:
Adult;
Evoked Potentials, Visual/physiology*;
Female;
Forensic Medicine/methods*;
Humans;
Male;
Photic Stimulation/methods*;
Time Factors;
Vision Disorders/physiopathology*;
Vision Tests/methods*;
Visual Acuity/physiology*;
Young Adult
- From:
Journal of Forensic Medicine
2009;25(6):409-411
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE:To investigate the changes of sweep pattern visual evoked response (SPVER) acuity in different temporal frequency.
METHODS:The persons were collected and divided into the low visual acuity group (71 eyes) and the high visual acuity group (92 eyes). The eyes were stimulated with different temporal frequency (8.5 Hz, 10 Hz, 15 Hz and 20 Hz, respectively) and the same series of spatial frequency. The accuracy of SPVER acuity in different temporal frequency was evaluated by compare the SPVER acuity with the subjective vision.
RESULTS:In the low visual acuity group, there was a good correlation between the SPVER acuity and the subjective vision applying the spatial frequency of the group. In the high visual acuity group, the SPVER acuity was lower than the subjective vision. SPVER acuity showed a good correlation with the subjective vision at the temporal frequency of 10 Hz in two groups.
CONCLUSION:The temporal frequency can influence SPVER accuracy, so it is necessary to select the suitable stimulation condition in forensic practice.
