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Tsunnnami
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Is the eye more sensitive to intermittent light/flashlight than to constant light , if both have the same intensity ?
https://en.wikipedia.org/wiki/Iris_(anatomy)Tsunnnami said:Is the eye more sensitive to intermittent light/flashlight than to constant light , if both have the same intensity ?
It doesn't sayA.T. said:
The first paragraph speaks of the purpose of the iris. What happens if you shine a light into someone's eye?Tsunnnami said:It doesn't say
Tsunnnami said:Is the eye more sensitive to intermittent light/flashlight than to constant light , if both have the same intensity ?
Logically if you flash a light into someone's eye, he blinks. Doesn't this mean that the eye is more sensitive to flash-light ?ZapperZ said:What exactly do you mean by "more sensitive"? Why do you think it should be more sensitive when the eye requires time to adjust its pupil during exposure of light? And how "intermittent" is this? If the time in between light flash is less than 0.02 seconds, you can no longer tell the difference between intermittent source and cw source (why do you think old-fashion film movies run at 24 frames per second?). I wouldn't call this "more sensitive" at all.
Zz.
Tsunnnami said:Logically if you flash a light into someone's eye, he blinks. Doesn't this mean that the eye is more sensitive to flash-light ?
The effect I was fishing for was the fact that if you shine a light into a person's eyes, the pupils contract. But please do not let that distract you from answering @ZapperZTsunnnami said:Logically if you flash a light into someone's eye, he blinks. Doesn't this mean that the eye is more sensitive to flash-light ?
Tsunnnami said:This was all that was specified in the exam question. We got no further details or specifications.
Thread is locked.Tsunnnami said:This was all that was specified in the exam question. We got no further details or specifications.
The eye is more sensitive to intermittent light compared to continuous light. This is because the eye has evolved to detect quick changes in light, which are typically associated with movement or danger. Continuous light does not provide this quick change, so the eye does not respond as strongly.
When the eye is exposed to intermittent light, the pupil will constrict and dilate rapidly in response to the changes in light intensity. This is known as the pupillary light reflex. It is a protective mechanism that helps the eye adjust to different lighting conditions and protect the retina from damage.
In general, exposure to intermittent light will not damage the eye. However, if the light is extremely bright or intense, it can potentially cause temporary or permanent damage to the retina. This is why it is important to not stare directly at bright flashes of light, such as from a camera flash or a welding torch.
As we age, the eye's sensitivity to intermittent light decreases. This is due to a natural decline in the function of the retina and the pupil. Older adults may find it more difficult to adjust to changes in lighting conditions and may experience more discomfort or glare when exposed to intermittent light.
Yes, intermittent light can have positive effects on the eye. For example, studies have shown that exposure to flickering light can improve visual acuity and contrast sensitivity in individuals with certain eye conditions, such as amblyopia (lazy eye). However, more research is needed to fully understand the potential benefits and risks of intermittent light on the eye.