73 The Digital Cullen Chart: An App to Assess the Visual Field in the Context of Sellar/parasellar Tumours

Abstract Aim 30 years ago, Cullen1 (a neuro-ophthalmologist) developed and validated a simple paper chart for evaluation of the central 25 degrees visual field. We re-developed this concept in digital form (as smartphone application) sought to assess its sensitivity specificity detecting field loss, through comparison with formal machine-based perimetry. Method A case series pilot study was performed test app-based Cullen concordance perimetry (Humphrey Octopus). 18 patients range sellar/parasellar tumours (pituitary adenoma, craniopharyngioma, meningioma) being managed single neurosurgical centre were involved study. Patients underwent as part standard care. They also assessment using smartphone-based routine outpatient assessment. 37 eye episodes assessed, incorporating pre- post- treatment potentially compressive pathologies. Results The had 75% 98% compared perimeters. positive predictive value 93% negative 92%. Conclusions In context tumours, shows strong It is therefore an accessible screening monitoring tool clinicians. With further study, there potential approval remote patient-led method.