VR can make you sick because of a conflict between the signals your eyes and inner ear send to your brain (equilibrium), leading to a mismatch in sensory cues, similar to motion sickness. This is often referred to as cybersickness.
Here’s a more detailed explanation….

Sensory Conflict: Your brain relies on visual and vestibular (inner ear) cues to understand your position and movement. In VR, your eyes might perceive movement (like a character running in the game), while your inner ear might not be registering that movement, or vice versa.

Cybersickness: This mismatch can lead to a range of symptoms, including nausea, dizziness, headaches, eyestrain, disorientation, and fatigue, collectively known as cybersickness.
Factors that Contribute:

Field of View: A narrow field of view in VR can contribute to cybersickness.

Frame Rate: Low frame rates can also cause issues.

Latency: High latency (delay between input and output) can also contribute to cybersickness.

Individual Susceptibility: Some people are more prone to VR sickness than others.

Mitigation Strategies:

Short Bursts: Start with short VR sessions and gradually increase the time.

Frequent Breaks: Take regular breaks to rest your eyes and inner ear.

Focus on a Fixed Point: Try focusing on a fixed point in the virtual environment to help your brain reconcile the sensory input.

Ginger: Ginger is a natural remedy for motion sickness and can help alleviate VR sickness.

Anti-Motion Sickness Medications: Consider taking Dramamine or other anti-motion sickness medications.