Narbis is an American company that develops smart glasses for focus training. Its system combines electroencephalography with lenses that change tint, allowing users to receive feedback during daily tasks. The company also offers products that pair its feedback glasses with external sensors.

How it works
Dry electrodes detect electrical signals from brain activity. Software analyses patterns associated with attention and distraction. When the system detects reduced focus, the lenses darken, and they clear again with the target pattern. This immediate visual feedback is intended to help users practise sustaining a more attentive state.

Key considerations
Electroencephalography cannot read thoughts, and attention classifications are simplified signal interpretations. Eye movement, facial muscles, fit and electrical interference can affect feedback. Training requires repeated use, and independent evidence for the system is limited.