Ciliary muscle effort in accommodation.
D000065:Accommodation, Ocular / Q000187:drug effects; D000328:Adult; D002924:Ciliary Body / Q000187:drug effects / Q000502:physiology*; D006801:Humans; D009119:Muscle Contraction; D010276:Parasympatholytics / Q000494:pharmacology*; D010830:Physostigmine / Q000494:pharmacology*; D014326:Tropanes / Q000494:pharmacology*; D014836:Volition
D010276:Parasympatholytics; D014326:Tropanes; D010830:Physostigmine