BACKGROUND:

The vertical strabismus manifested by Abraham Lincoln has been noted. This article reviews the historical findings and provides a specific diagnosis.

MATERIALS:

Previous reports of symptoms and history relating to Lincoln's left hypertropia were reviewed. A series of photographs were reviewed. Lincoln's own description of his symptoms is provided.

RESULTS:

Previous history indicates an intermittent left hypertropia. A family history of vertical strabismus was noted with regard to Mr Lincoln's cousin. There also is a history of trauma to the left frontal area and life-mask evidence of fracture over the left eye. The findings include a history of head tilt and diplopia, presumably most readily in downgaze.

CONCLUSION:

Given the history and findings, the diagnosis of left superior oblique paresis of either congenital or traumatic origin seems appropriate.