Apple Vehicle Motion Cues: Reducing Motion Sickness via Peripheral Visual Cues
Apple has introduced a feature called Vehicle Motion Cues, lauding it as a solution for users who experience motion sickness while using their devices in moving vehicles. By displaying dynamic dots on the edges of the screen, the system attempts to resolve the sensory conflict that typically leads to nausea.
The Mechanism: Resolving Sensory Conflict
Motion sickness occurs when there is a mismatch between the visual system and the vestibular system (the inner ear). When a user focuses on a fixed screen while in a moving car, the eyes report stability, while the inner ear detects acceleration and turns.
According to community discussion, this sensory mismatch is theorized to be an evolutionary response to neurotoxin ingestion. As one user noted:
"One of the first symptoms of neurotoxin ingestion is that your eyes lose their tracking ability... we presumably evolved a simple rule: if (eyes != ears) { vomit(); }"
Vehicle Motion Cues address this by providing peripheral visual cues that mimic the vehicle's motion. This allows the brain to perceive motion in the periphery, aligning the visual input with the vestibular system's data, effectively "tricking" the brain into believing the eyes are seeing the movement the body is feeling.
User Efficacy and Mixed Results
While many users report the feature as a "game changer" and a "lifesaver" for passengers in Ubers or transit, the results are highly subjective. The efficacy of the feature varies significantly across the population:
- Positive Outcomes: Some users report being able to use their phones for the first time in years without feeling ill, while others find it makes tasks like messaging or using Google Maps more bearable.
- Negative Outcomes: A small number of users report that the dots actually increase their nausea or provide no relief at all.
- No Effect: Some users found that the feature did not work for them, continuing to feel sick within minutes of reading in the iOS Books app.
Alternative Solutions for Motion Sickness
Beyond Apple's software-based approach, users have discussed several other methods for managing motion sickness, ranging from high-tech to behavioral:
Hardware and Software Alternatives
- Android Apps: There are numerous Android equivalents, such as KineStop, that provide similar visual cues.
- Motion Sickness Glasses: Specialized glasses with liquid-filled rims that act as artificial horizons to provide a constant visual reference.
- TENS Devices: Wristbands like EmeTerm that use mild electrical stimulation to reduce nausea.
Behavioral and Clinical Treatments
- Habituation: Some users find that increased exposure to the motion (e.g., spending more time on boats) helps the body adapt.
- Clinical Simulation: One user shared a success story regarding a specialized simulator program at the University of North Dakota, which uses controlled spinning and distraction to permanently cure motion sickness through habituation.
- L2-Visual Hacking: Some users employ mental imagery, such as imagining themselves skiing or weaving through a crowd, to match the physical sensations of movement to a perceived visual action.
Implications for VR and Gaming
The concept of peripheral motion cues is not new to the virtual reality (VR) industry. In VR, "tunnel vision"—shrinking the video feed and adding a black border during movement—is often used to reduce motion sickness by limiting the peripheral cues that conflict with the body's stationary position. Apple's Vehicle Motion Cues apply this principle in reverse: adding motion cues to a stationary screen to match the body's actual movement.