Eye contact feels different for autistic people because their brains process direct gaze with heightened arousal, making it uncomfortable, distracting, or even overwhelming. This isn’t a social choice or a sign of disinterest. It’s rooted in measurable differences in how the brain responds to looking at another person’s eyes.
The Brain’s Threat System Overreacts to Direct Gaze
The most well-supported explanation centers on a brain structure called the amygdala, which processes emotional significance and threat. In neurotypical people, the amygdala responds to eyes in a calibrated way, flagging them as socially important without triggering distress. In autistic people, the amygdala often becomes hyperactive when gaze is directed at the eye region of a face, particularly when expressions are fearful, neutral, or ambiguous.
Brain imaging studies have shown that the longer autistic participants look at someone’s eyes, the more their amygdala activates. This correlation doesn’t appear in neurotypical participants at all. The result is a kind of escalating discomfort: looking at eyes triggers emotional arousal, which makes the experience unpleasant, which motivates looking away. This is known as the eye avoidance hypothesis, and a 2023 review in the Journal of Autism and Developmental Disorders found consistent evidence supporting it across multiple studies.
The response isn’t limited to the amygdala. Other deep brain structures involved in automatic alerting, including the superior colliculus and parts of the thalamus, also show overactivation in autistic individuals when faces have direct gaze. These structures are part of a rapid, unconscious face-detection system that sends signals before you’re even aware of what you’re seeing. When this system runs hot, even a brief moment of eye contact can feel like a jolt.
The Fast-Track Face System Works Differently
Your brain has two routes for processing faces. One is slow and conscious, running through the visual cortex. The other is a rapid subcortical shortcut: the retina sends signals to the superior colliculus, which relays through the pulvinar (a structure in the thalamus), which then connects to the amygdala. This fast pathway detects faces automatically and evaluates them for emotional content before you’ve consciously registered what you’re looking at.
Research using brain imaging found that this entire subcortical network activates robustly in neurotypical people when they see fearful faces, even faces flashed so quickly they’re barely perceptible. Autistic participants in the same study only activated the fusiform gyrus, a cortical area responsible for identifying who a face belongs to, not what it means emotionally. The deeper structures that handle rapid emotional face-reading stayed quiet. This suggests two things happening at once: the fast detection system underperforms for quick, automatic social reads, yet when autistic individuals do focus on the eye region deliberately, the system can overreact and produce discomfort. It’s a lose-lose setup for comfortable eye contact.
It’s Not Always About Anxiety
A common assumption is that autistic people actively avoid eyes because eye contact feels threatening. But research with very young children tells a more nuanced story. A study published in the American Journal of Psychiatry tested whether toddlers newly diagnosed with autism were showing gaze aversion (actively looking away from eyes) or gaze indifference (simply not being drawn to eyes in the first place). The results clearly supported gaze indifference. At the time of initial diagnosis, children with autism weren’t flinching away from eyes. They just weren’t pulled toward them the way neurotypical children are.
This distinction matters because it suggests the experience changes over time. In early childhood, the eyes simply don’t register as a priority signal. As autistic children grow older and encounter social pressure to make eye contact, the experience can shift from passive indifference to active discomfort, especially as they become more aware of social expectations and the amygdala-driven arousal response becomes more pronounced.
Reduced Eye Contact Appears Early
NIH-funded research tracking infants from birth found that eye-looking behavior begins declining as early as 2 months of age in babies later diagnosed with autism. At 2 months, these infants looked at eyes just as much as their peers. But between 2 and 6 months, a steady drop-off began and continued throughout the study period. This is significant because it shows the difference isn’t present at birth but emerges very early in development, before any social learning or conscious avoidance could be at play.
Eye Contact Competes With Thinking
Even for neurotypical people, looking away during conversation helps with thinking. It’s why people often glance upward or to the side when trying to recall something. Eye contact takes up cognitive bandwidth, and breaking it frees up processing resources. For autistic people, this effect is amplified. Maintaining eye contact while simultaneously listening, processing language, and formulating a response can create a kind of cognitive traffic jam.
A study testing children on a short-term memory task found that the experimenter’s gaze direction affected performance differently in autistic versus neurotypical children. The task was simple: hear a string of digits, repeat them back. But when the experimenter maintained eye contact during the task, it changed how autistic children processed the information. Many autistic adults describe this experience clearly: they can either look at your eyes or listen to what you’re saying, but doing both at once degrades their ability to do either well.
Social Reward Signals Are Muted
There’s another layer to the puzzle. The social motivation hypothesis suggests that autistic brains find social stimuli less rewarding, which reduces the drive to seek out social engagement like eye contact. A meta-analysis published in JAMA Psychiatry, pooling data from multiple brain imaging studies, found that reward-processing areas in the brain (particularly the caudate, a structure involved in motivation and reward anticipation) showed reduced activation in autistic individuals when they viewed social stimuli. Interestingly, these same regions also showed reduced activation for nonsocial rewards, suggesting the difference isn’t specific to social motivation but reflects broader differences in how the brain’s reward system operates.
In practical terms, this means the “pull” toward eye contact is weaker. Neurotypical people get a small neurological reward from mutual gaze, reinforcing the behavior. When that reward signal is quieter, there’s less incentive to seek out or sustain eye contact, especially when the experience simultaneously triggers discomfort or cognitive overload.
Forcing Eye Contact Has Real Costs
Many autistic people learn to perform eye contact as part of a broader pattern called masking, where they suppress autistic behaviors and mimic neurotypical ones to fit social expectations. Forcing eye contact is one of the most commonly cited masking behaviors, and the psychological toll is well documented.
Research has found that higher levels of masking predict increased depression, anxiety, burnout, and exhaustion. One study found masking was a significant predictor of both depression and anxiety, and was also associated with lower self-esteem, less authentic living, and greater self-alienation, a feeling of being disconnected from your true self. Autistic adults frequently describe the experience as creating cognitive dissonance: feeling socially compelled to maintain eye contact while simultaneously finding it physically uncomfortable and psychologically draining.
This is why many autism advocates and clinicians have moved away from teaching forced eye contact as a social skill. The energy an autistic person spends maintaining eye contact is energy diverted from actually processing what you’re saying, understanding your emotions, or formulating a thoughtful response. Looking slightly to the side, at the bridge of someone’s nose, or simply away while listening isn’t a social failure. It’s often the strategy that allows the best communication to happen.
What This Means in the DSM-5
The diagnostic criteria for autism spectrum disorder include “abnormal eye contact” as one example of difficulties with nonverbal communication used for social interaction, listed alongside differences in body language and understanding of gestures and facial expressions. It’s worth noting that “abnormal” here is a clinical descriptor, not a value judgment. Reduced eye contact alone doesn’t indicate autism, and not all autistic people struggle with it to the same degree. It’s one piece of a broader pattern of differences in how social communication works.