<prompt> UGH syndrome is commonly due toACIOLPCIOLSeveral fixed IOLPiggy back IOL  <response>: Ans. a ACIOLRef: Cornea by Mark J Mannisp. 196UGH syndrome is caused by mechanical excoriation of the iris from an IOL haptic or optic that results in uveitis, glaucoma, and hyphema.It is most commonly due to use of ACIOL, though it can also be seen with use of PCIOL if a malpositioned haptic is present. 