Recognition acuity refers to the minimum size of a high-contrast object that allows us to recognise it. It is a commonly used measure in the clinic and is limited by optical and neural elements of the eye and by processing within the visual cortex. The perceived size of objects can be changed by motion-adaptation. Viewing receding or looming motion makes subsequently viewed stimuli appear to grow or shrink respectively. It has been reported that these changes in perceived size impact recognition acuity thresholds. We set out to determine if such acuity changes are reliable, and what might be driving this phenomenon.