there is no enopthalmos, although the narrow palpebral aperture may suggest it
Also:
despite the ptosis - normal range of lid movement in and up and down movement - supplied by the third nerve
despite the miosis, the pupillary response to light and the near reflex are brisk and sustained but dilation of the Horner's pupil in response to darkness is diminished or absent
the degree of miosis is not related to the level of the lesion i.e. whether central, pre- or post- ganglionic
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