dark adaptation
Học thuậtThân thiện
Definition
- Noun:
- The process by which the eyes adjust to low levels of illumination: This is a physiological process where the visual system increases its sensitivity in dim light. Initially, the cone cells adapt quickly, followed by a slower, more prolonged adaptation of the rod cells, which can continue for several hours.
Usage Examples
- Noun:
- After entering the cave, our dark adaptation began, and we could slowly make out shapes in the gloom.
- Astronomers avoid bright lights before observing to preserve their dark adaptation.
- The experiment measured the time required for complete dark adaptation.
Advanced Usage
- "To undergo dark adaptation": to experience this physiological process.
- Pilots must undergo dark adaptation before night flights for optimal vision.
- "State of dark adaptation": the condition of being fully adjusted to darkness.
- His state of dark adaptation was ruined when someone turned on a flashlight.
Variants and Related Words
- Dark-adapted (adj): Describing the eyes or visual system after completing this process.
- With dark-adapted eyes, she could see the faint glow of the stars.
- Light adaptation (n): The opposite process of adjusting the eyes to bright light.
- Squinting is a sign of light adaptation.
Synonyms
- Scotopic adaptation: A more technical term referring specifically to the adjustment of rod cells in very low light.
- Night vision adjustment: A descriptive phrase for the process.
Related Phrases
- "To achieve full dark adaptation": to complete the adjustment process.
- It can take over thirty minutes to achieve full dark adaptation.
- "To compromise one's dark adaptation": to impair or reset the adjustment process by exposing the eyes to light.
- Looking at your phone screen will compromise your dark adaptation.
Noun
- the process of adjusting the eyes to low levels of illumination; cones adapt first; rods continue to adapt for up to four hours