-: In this video, we can appreciate the vermiform movement
of the pupil where there is a poor constriction to light
but improved constriction to near response,
which characterizes the light-near dissociation
of a tonic pupil in a 17-year-old girl With a history
of upper respiratory tract infection one month back,
the mildly irregular shape of the pupil is attributable
to intact contraction of the iris sphincter adjacent
to sectoral regions of paretic denervated sphincter.
So this is a characteristic appearance
of a recent onset tonic pupil, rather than chronic.
Thank you.