In dim light the pupils expand to allow as much light to enter the eye as possible.
(the pupils; expand; L:In dim light) (the pupils; to allow; as much light to enter the eye as possible) Context(the pupils to allow,List([13, 39))):(as much light; to enter; the eye)
the pupils to allow,List([13, 39))
the pupils the pupils as much light
expand to allow to enter
L:In dim light
as much light to enter the eye as possible
the eye