Horizontal deviations are classified into two varieties . " Eso " describes inward or convergent deviations towards the midline . " Exo " describes outward or divergent misalignment.
2.
For patients who have had healthy vision heretofore until a small, horizontal deviation set in suddenly, the injection of botulinum toxin may allow them to maintain the binocular vision skills that had been acquired earlier.
3.
A contemporary account of an operational test carried out on a Howell torpedo described its performance, where it " ran along the surface at a very fast but very regular speed for four minutes " and that there was " no horizontal deviation and the run was fully 900 yards ".
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