Complex sentence: Upon hearing of her engagement to Larry Schwartz, Pugach hired three assailants to attack Riss, throwing lye in her face, leaving her blind in one eye (she lost her sight in the other eye during heart surgery) and permanently scarred.
Split into simpler sentences: Upon hearing of her engagement to Larry Schwartz, Pugach hired three assailants to attack Riss. The assailants thew lye in Riss's face, leaving her blind in one eye, nearly blind in the other, and permanently scarred.