( ( ( ( ( ( Intraocular pressure ) ( decreased ( with LASIK ) ) ) , ) but ) ( ( ( the cause ) ( of ( the decrease ) ) ) ( is unknown ) ) ) . )
(ROOT (S (S (NP (JJ Intraocular) (NN pressure)) (VP (VBD decreased) (PP (IN with) (NP (NNP LASIK))))) (, ,) (CC but) (S (NP (NP (DT the) (NN cause)) (PP (IN of) (NP (DT the) (NN decrease)))) (VP (VBZ is) (ADJP (JJ unknown)))) (. .)))
Intraocular pressure decreased with LASIK, but the cause of the decrease is unknown.
(ROOT (S (S (VP (VBG Reducing) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (NNS molecules)) (PP (IN in) (NP (DT a) (JJ rigid) (NN container)))))))) (VP (VBZ causes) (NP (NN pressure)) (S (VP (TO to) (VP (VB decrease))))) (. .)))