Reconstruction of Optical Metamorphopsia Produced by Pathological Retinal Layers

Visualization of Optical Metamorphopsia, as produced by pathological retinal layers of the human eye

April 2012 - January 2013
Peter von Niederhäusern

The eye, as one of the more complex sensory systems of the human body, is susceptible to many diseases, which influence heavily the visual perception mechanism. Optical coherence tomography (OCT) offers an approved technique to produce images of the retinal layers of a patient. An algorithm developed in this thesis segments standard OCT B-scan images to gain structural information of the pathological outer retinal layers (left figure). A novel approach then uses light ray tracing to analyse the 3D retina model and to determine a description of the deformation produced by the pathological retinal layers (right figure).

The deformation description is then applied on the Amsler grid which gives a visual clue how the patient perceives him/herself this grid.