Employing following eye movements to discriminate normal from glaucoma subjects

Wl Severt, T. Maddess, Ibbotson

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We 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.

Original languageEnglish
Pages (from-to)172-174
Number of pages3
JournalClinical and Experimental Ophthalmology
Issue number3
StatePublished - 2000
Externally publishedYes


  • Frequency doubling
  • Glaucoma
  • Illusion
  • Optokinetic nystagmus
  • Variability


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