advertisement
Abstract #15939 Published in IGR 2-3
Employing following eye movements to discriminate normal from glaucoma subjects
Severt WL; Maddess T; Ibbotson MRClinical and Experimental Ophthalmology 2000; 28: 172-174
The authors recorded optokinetic nystagmus (OKN) to see if slow phase velocity, duration, or other measures were affected by glaucoma. Drifting grating patterns that either weakly or strongly evoked the spatial frequency doubling illusion were employed. Analysis of 68 variables characterizing the OKN revealed that small subsets of these variables were good at discriminating normal from primary open-angle glaucoma subjects. The variables were related to the regularity of following eye movements. Models including the best five variables selected in two different ways classified about 90% of subjects correctly. Impaired accuracy of eye movements suggests that glaucoma changes the signal to noise ratio available to the brain. The gross changes observed permit the use of electro-oculography or other simple methods in the clinic.
Dr. T. Maddess, Visual Sciences Group, Research School of Biological Sciences, Australian National University, Canberra, ACT 0200, Australia
Classification:
6.6.3 Special methods (e.g. color, contrast, SWAP etc.) (Part of: 6 Clinical examination methods > 6.6 Visual field examination and other visual function tests)
