( ( Other ( treatment options ) ) ( ( may ( ( involve surgery ) ( ( ( to ( correct ( the ( unbalanced ( eye muscles ) ) ) ) ) or ) ( to ( remove ( a cataract ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Other) (NN treatment) (NNS options)) (VP (MD may) (VP (VB involve) (NP (NN surgery)) (S (VP (VP (TO to) (VP (VB correct) (NP (DT the) (JJ unbalanced) (NN eye) (NNS muscles)))) (CC or) (VP (TO to) (VP (VB remove) (NP (DT a) (NN cataract)))))))) (. .)))
Other treatment options may involve surgery to correct the unbalanced eye muscles or to remove a cataract.
(ROOT (S (NP (DT The) (NN option) (S (VP (TO to) (VP (VB remove) (S (NP (NN kidney) (NNS stones)) (ADJP (JJ other) (PP (IN than) (NP (NN surgery))))))))) (VP (VBZ is) (NP (NN ultrasound) (NNS treatments))) (. .)))