Autonomous sensory meridian response is thought to be experienced by around 58% of the population. It’s a physical response to visual and auditory stimuli, often described as ‘tingles’, usually in the back of the scalp and spine, and likened to “low-grade euphoria”. Within this niche, role-play appointments with ‘optometrists’ are enjoying a moment within the ASMR community with the top five YouTube videos tagged ‘ASMR optometrist’ having a combined view count of 11.7 million.