Papilloedema Measurements using OCT
Children with brain tumours are often referred to a paediatric ophthalmologist, as their tumour likely causes papilloedema, where the optic disc swells as a result of a raised intracranial pressure. To avoid potentially damaging tests, such as a CT scan, the child is sent to a paediatric ophthalmologist to see if they have relapsed. Most commonly, a fundus camera is used to visualize 2-D imaging of the optic nerve. Alternatively, the Optical Coherence Tomography (OCT) is available to take 3-D measurements of the optic nerve but knowledge of its accuracy in measuring papilloedma levels is limited. As a result, McMaster Pediatric Eye Research Group seeks to conduct an extensive study to determine the accuracy of OCT in measuring worsening papilloedema levels, in comparison to human eye assessment and the fundus camera.