for the inhibition of the abnormal postnatal axial growth of the eye of a maturing animal which comprises a pharmaceutically effective amount of a muscarinic pharmacological antagonist relatively selective for blocking the cholinergic receptors in cells of the brain neural tissue and or neural ganglia but less selective for blocking the cholinergic receptors of the cells of smooth muscles at the front of the eye said antagonist present in a carrier or diluent suitable for ocular administration a suitable antagonist is pirenzepine other suitable antagonists are telenzepine and o methoxy sila hexocyclium application_number US 85662692 A description in the ordinary visual function of the eye of an animal light forming an image passes through the lens and is received by the retina a neural tissue embryologically related to the brain the retina transmits this information to the optic nerve which sends it on to the brain retinal neurochemicals i e neuro active chemical compounds are key ingredients in the vision process specifically light forming the image is sensed by the light receptors the rods and cones of the retina these photoreceptors act as transducers changing light energy into electrical and or chemical signals in the regular process of transmitting the image information to the brain retinal nerve cells in association with the photoreceptors release neurochemicals to pass information to adjacent retinal cells as parts of a network in the retina leading to the formulation and qualities of the signals.