Sweep pattern visual evoked response acuity vs logarithmic visual acuity
- VernacularTitle:扫描翻转图像视觉诱发电位视力与对数视力表视力的比较
- Author:
Jie, ZHU
;
Haisheng, LI
- Publication Type:Journal Article
- Keywords:
pattern;
visual;
evoked;
response;
visual;
acuity
- From:
Chinese Journal of Experimental Ophthalmology
2001;19(3):246-249
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo compare the sweep pattern visual evoked response acuity SPVER-A with the logarithmic visual acuity.MethodsSPVER-A and logarithmic visual acuity were measured and compared in 50 people. 8-squared vertical gratings were presented as stimuli continuously.The responses were averaged and displayed through the discrete fourier transform on the monitor display.The SPVER acuity was determined by extrapolating the SPVER amplitude-spatial frequency function to baseline.ResultsThe overall correlation was r=0.699 between the SPVER-A and logarithmic visual acuity.Underestimation of acuity by the SPVER when the logarithmic visual acuity is better than 0.5.On the other hand,when the logarithmic visual acuity is worse than 0.5 the SPVER-A was overestimated.ConclusionSPVER-A has a good correlation to logarithmic acuity.The difference between two methods may indicate that the grating acuity and logarithmic /visual acuity activate different system.
