visual sensation
Học thuậtThân thiện
Definition
Noun: 1. The conscious experience or perception of sight; the immediate subjective experience produced when light stimulates the retina and the resulting neural signals are processed by the brain. It is the "what it feels like to see" aspect of vision, distinct from the physical properties of light or the physiological mechanics of the eye.
Usage
- The term "visual sensation" is used in psychology, neuroscience, and philosophy to discuss the raw, subjective experience of seeing, such as color, brightness, shape, and motion, before higher-level cognitive interpretation.
- It often contrasts with "visual perception," which involves the brain's interpretation and understanding of sensations.
- It is a formal or technical term.
Examples
- Noun:
- The sudden visual sensation of a bright flash was followed by a loud bang.
- Scientists study how the brain constructs a coherent visual sensation from disparate signals.
- The drug altered his visual sensations, causing colors to appear more vivid.
Advanced Usage
- In philosophical contexts: "Visual sensation" is a key concept in discussions of qualia (individual instances of subjective experience) and the mind-body problem, exploring how physical processes give rise to conscious experience.
- In clinical contexts: Neurologists may assess a patient's basic (like light detection) separately from their visual perception (like object recognition) to localize brain damage.
Variants and Related Words
- Sensation (n): A general term for any conscious experience resulting from stimulation of a sensory organ (e.g., auditory sensation, tactile sensation).
- Percept (n): A more technical term for a single, recognized object or feature of the environment resulting from the perceptual process.
- Phosphene (n): A specific type of visual sensation characterized by seeing light without light actually entering the eye, often caused by pressure on the eyeball.
Synonyms
- Visual experience
- Sight (in its experiential sense)
- Seeing
Related Phrases / Collocations
- Field of visual sensation: The entire area from which light produces a conscious visual experience.
- Quality of a visual sensation: Refers to attributes like hue, saturation, and brightness.
- Threshold of visual sensation: The minimum stimulus intensity required to produce a conscious visual experience.
Noun
- the perceptual experience of seeing
- the runners emerged from the trees into his clear vision
- he had a visual sensation of intense light