Intraoperative floppy iris syndrome (IFIS) occurs owing to drug-induced blockade of the α-1a receptors present in the iris dilator muscle in a large proportion of patients who take or have previously ...

How did people ever find the chemical that makes pupils dilate? Donald Mutti, a professor at the Ohio State University College of Optometry, eyes an answer to this query: The discovery was probably ...

ROME – Intracameral phenylephrine injection minimizes the effects of intraoperative floppy iris syndrome in patients who have taken alpha-1 blocking drugs, according to one surgeon. “In these patients ...

Horner syndrome is characterized by anisocoria with the smaller pupil unable to adequately dilate because of impaired innervation to the iris dilator muscle. It is typically associated with ...