Pilocarpine is a medicine belonging to the group of direct parasympathomimetics and is used in ophthalmology to cause miosis. It is a alkaloid, which can be found in the leaves of the tropical American shrubs (genus Pilocarpus).
I have nearly achieved symmetrical geometry using eye drops. Multicoloured picture can’t even be obtained using polarisation filters. I have achieved a strong contrast thanks to dark field microscopy.