During a speech in Philadelphia on Monday, The American Mirror noticed that Hillary's left eye would occasionally turn inward while she was delivering the speech.
This condition is known as intermittent esotropia. It is usually first spotted in very young children.
According to the Univeristy of Michigan Kellogg Eye Center:
Among adults, medical conditions like strokes,thyroid disease, diabetic nerve disease or head trauma can also cause an esotropia.-RW
This type eye movement could also be considered Saccadic eye movement which is linked to Parkinson's disease.
From the Indian Journal of Opthalmagy:
PD is a motor control disorder due to degeneration of dopaminergic neurons in the SNc leading to reduction in dopamine levels. There is increased inhibitory output from BG, which affects thalamo-cortical circuits and SC, leading to motor symptoms like bradykinesia. As a consequence of the general impairment in the motor functions, eye movement impairments have also been reported in these patients.[31,32] Different saccadic tasks like visually guided reflexive saccades, voluntary and memory guided saccades have been used to study eye movements in PD. Abnormal saccadic performance in PD is considered to be due to depletion of dopamine in the caudate nucleus. There is an overall increase in the inhibitory output to SC and thalamus due to increased activity in the indirect pathway leading to more excitatory activity of STN and a decreased activity in the direct pathway leading to increased inhibition of SNr/GPi.[33,34] STN is one of the major sites for deep brain stimulation in PD patients.
(ht Graham Dugas)