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Abstract #18991 Published in IGR 3-1
Movement detection threshold and ocular hypertension
Ansari E; Buckingham TEye 2001; 15: 193-196
PURPOSE: To determine whether patients with ocular hypertension (OH) have elevated oscillatory movement displacement thresholds (OMDT) indicative of early neural damage. METHODS: Evidence of early neural loss was sought using OMDT. The OMDTs of 29 normotensive individuals was compared with those obtained from 44 unrelated age-matched OH eyes (20 male, 24 female). RESULTS: A mean OMDT at 15 sec arc at 40 years of age was obtained in normotensive individuals, the age trend increasing by about 4 sec arc per decade. About one-third of all ocular hypertensives (13 cases; six male, seven female), who were dismissed without treatment, exhibited abnormal OMDT. An equal proportion of abnormal thresholds was observed in individuals in each decade, although the age trend diverged from that established for normotensives with increasing age. Mean OMDT for ocular hypertensives (37.1 sec arc) was significantly different (t = 2.7, p < 0.007) from the mean obtained from normotensives (22.2 sec arc). CONCLUSIONS: The results emphasize the need for more rigorous differentiation of OH using psychophysical techniques indicating early neural damage.
Dr E. Ansari, Department of Ophthalmology, Cardiff Eye Unit, University Hospital of Wales, Health Park, Cardiff CF4 4XW, UK. eaansari@aol.com
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)
