( ( ( ptosis Drooping ) ( of ( the upper ) ) ) ( ( ( eyelid ( over ( the pupil ) ) ) ( when ( ( the eyes ) ( ( are fully ) opened ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP ptosis) (NNP Drooping)) (PP (IN of) (NP (DT the) (JJ upper)))) (VP (VBD eyelid) (PP (IN over) (NP (DT the) (NN pupil))) (SBAR (WHADVP (WRB when)) (S (NP (DT the) (NNS eyes)) (VP (VBP are) (ADVP (RB fully)) (VP (VBN opened)))))) (. .)))
ptosis Drooping of the upper eyelid over the pupil when the eyes are fully opened.
(ROOT (S (NP (DT The) (NN pupil)) (VP (VBZ is) (NP (NP (DT the) (NN opening)) (PP (IN in) (NP (NP (DT the) (NN front)) (PP (IN of) (NP (DT the) (NN eye))))))) (. .)))