The achiasmia spectrum: congenitally reduced chiasmal decussation
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- [view video] - Horizontal movements were recorded from the right eye and vertical movements were recorded from the left eye. A chin rest was used to stabilise the head and the subject was asked to fixate on a red LED light subtending a quarter of a degree of visual angle. The eye movement recordings were calibrated by asking the subjects to fixate additional positions spaced ±15 degrees apart horizontally and ±5 degrees apart vertically. Video recordings of eye movements were also made to facilitate interpretation of the quantitative eye movement recordings.
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