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Optical coherence tomography does not support optic nerve involvement in amyotrophic lateral sclerosis

In recent years a possible non‐motor involvement of the nervous system in amyotrophic lateral sclerosis (ALS) has come into the focus of research and has been investigated by numerous techniques. Optical coherence tomography (OCT) – with its potential to reveal neuroaxonal retinal damage – may be an appropriate tool to investigate whether the anterior visual pathway is involved. Our aim was to determine whether OCT‐based measures of retinal nerve fiber layer, ganglion cell layer, inner nuclear layer and outer nuclear layer thickness are abnormal in ALS, or correlated with disease severity.