First Author: A.Tan SINGAPORE
Co Author(s): R. Png A. Chia 0 0 0 0 0 0 0 0 0
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Purpose: To study the use of electrophysiology in clinical practice by identifying the reasons for referrals and the spectrum of diagnoses.
Visual Electrophysiology Laboratory at the Singapore National Eye Center
This was a retrospective review of all children aged <16 years, who were referred to the Visual Electrophysiology Laboratory at the Singapore National Eye Center between 2003 and 2013.
586 children (mean age: 8.2 +/- 4.3 years, range 2months-16 years) were included in this study. Referrals were made for reasons like: poor vision for investigation 233 (40%); suspected retinal disease or optic nerve/cortical dysfunction 172 (29%); determining the cause of nystagmus 78 (13%); assessing visual function in the presence of visual symptoms 30 (5%) and screening for eye conditions 73 (12%). Visual acuity could not be assessed in 35 (6%) patients due to a young age or poor compliance. 381 (65%) patients had vision 6/15 or worse and of those 105 (18%) had vision 6/120 or worse in at least 1 eye. Tests were suggestive of a retinal dystrophy in 243 (41%) children (113 cone or cone-rod, 82 rod-cone and 48 photoreceptor dystrophy). 16 (3%) had congenital stationary night blindness, 2 had X-linked retinoschisis, 34 (6%) had maculopathy and 80 (14%) had evidence of optic nerve/cortical dysfunction.
Electrophysiology testing plays an important role in the assessment of children with suspected low vision. An early and accurate diagnosis in a visually impaired child has important implications for visual rehabilitation, early intervention, improving social supports and early family counselling to improve their quality of life.