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Nyctalopia (/ ˌ n ɪ k t ə ˈ l oʊ p i ə /; from Ancient Greek νύκτ-(núkt-) 'night' ἀλαός (alaós) 'blind, invisible' and ὄψ (óps) 'eye'), [1] also called night-blindness, is a condition making it difficult or impossible to see in relatively low light. It is a symptom of several eye diseases.
Night blindness, on the other hand, which is also referred to as nyctalopia, is a condition in which someone has extreme difficulty or loses the ability to see in the dark or in dimly lit areas.
The word hemeralopia comes from the Greek ημέρα hemera, "day", and αλαός alaos, "blindness". Hemera was the Greek goddess of day, and Nyx was the goddess of night. Hemeralopia has been used to describe night blindness rather than day blindness by many non-English-speaking doctors, causing confusion. [1]
Cones work at high light levels (during the day but also during driving at night in the headlamp spotlight). Rods take over at twilight and night. The y-axis has logarithmic scaling. A minor mechanism of adaptation is the pupillary light reflex, adjusting the amount of light that reaches the retina very quickly by about a factor of ten. Since ...
Visual or vision impairment (VI or VIP) is the partial or total inability of visual perception.In the absence of treatment such as corrective eyewear, assistive devices, and medical treatment, visual impairment may cause the individual difficulties with normal daily tasks, including reading and walking. [6]
2011: Night View Assist Plus with Spotlight Function premiere: the Mercedes-Benz CL-Class (C216) became the first series production car with night vision-guided pedestrian spotlighting (HID version) [11] can flash at any pedestrians it detects in order to warn both the driver and the pedestrians. The flashing light is directed in such a way ...
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