( ( ( ( Bi-concave lens ) , ) ( 90mm long ) ) ; )
(ROOT (NP (NP (JJ Bi-concave) (NN lens)) (, ,) (NP (CD 90mm) (RB long)) (: ;)))
Bi-concave lens, 90mm long;
(ROOT (S (NP (JJ Concave) (NNS lenses)) (VP (MD can) (VP (VB correct) (NP (NN myopia)))) (. .)))