<prompt> Fastest and briefest action occurs inAtropineHomatropineTropicamideCyclopentolate  <response>: Tropicamide: 118-KDT 7th editionTROPICAMIDE - has quickest 20-40 min and briefest 3-6 hours action but is a relatively unreliable cycloplgic It is satisfactory for refraction testing in adults and as a short acting mydriatic for fundoscopy The mydriatic action can be augmented by combining with phenylephrine 