<prompt> Not a feature of Horner syndrome:ExophthalmosPtosis of upper eyelidMiosisConjunctival congestion  <response>: Ans : A Exophthalmos The triad of miosis with ipsilateral ptosis and anhidrosis constitutes Horners syndrome, although anhidrosis is an inconstant feature. Brainstem stroke, carotid dissection, or neoplasm impinging upon the sympathetic chain are occasionallyHorners syndrome- miosis, ptosis, anhydrosis, enophthalmos loss of ciliospinal reflex- BDC 4thVoI. I 53Horners syndrome also Horner syndrome, Bernard-Horner syndrome, Claude Bernard-Horner syndrome or as oculosympathetic palsy is the combination of drooping of the eyelid ptosis and constriction of the pupil miosis, sometimes accompanied by decreased sweating of the face on the same side; redness of the conjunctiva of the eye is often also present. It indicates a problem with the sympathetic nervous system, a part of the autonomic nervous system- wMpecfaj.orgSigns and Symptoms that are found in all patients on the affected side of the face include Partial ptosis drooping of the upper eyelid from loss of sympathetic innervation to the superior tarsal muscle, also known as Mullers muscleUpside-down ptosis slight elevation of the lower lidAnhidrosis decreased sweating on the affected side of the faceMiosis small pupilsEnophthalmos the impression that the eye is sunk inLoss of ciliospinal reflexBloodshot conjunctiva, depending on the site of lesson.Note:Sometimes there is flushing on the affected side of the face due to dilation of blood vessels under the skin. The pupils light reflex is maintained as this is controlled via the parasympathetic nervous system.In children, Horners syndrome sometimes leads to heterochromia: a difference in eye color between the two eyes. 