1. Plural of hyperacuity; visual or sensory abilities that exceed normal human perception thresholds, allowing discrimination of stimuli smaller than the diffraction limit of the eye.
Usage: technical; psychology and neuroscience; often used in research on visual perception

Examples

• Researchers studied hyperacuities to understand how the brain processes visual information beyond theoretical limits.
• The athlete's hyperacuities allowed her to detect minute movements in her opponent's posture.
• Hyperacuities in vernier acuity enable people to align two lines with remarkable precision.
• Scientists investigate hyperacuities as evidence of neural mechanisms that enhance sensory perception.
• Some individuals demonstrate hyperacuities in pitch discrimination, hearing differences of a few hertz.