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flashes    音标拼音: [fl'æʃɪz]
n. 光芒

光芒

Flash \Flash\, n.; pl. {Flashes}.
1. A sudden burst of light; a flood of light instantaneously
appearing and disappearing; a momentary blaze; as, a flash
of lightning.
[1913 Webster]

2. A sudden and brilliant burst, as of wit or genius; a
momentary brightness or show.
[1913 Webster]

The flash and outbreak of a fiery mind. --Shak.
[1913 Webster]

No striking sentiment, no flash of fancy. --Wirt.
[1913 Webster]

3. The time during which a flash is visible; an instant; a
very brief period; as, I'll be back in a flash.
[1913 Webster PJC]

The Persians and Macedonians had it for a flash.
--Bacon.
[1913 Webster]

4. A preparation of capsicum, burnt sugar, etc., for coloring
and giving a fictitious strength to liquors.
[1913 Webster]

5. A lamp for providing intense momentary light to take a
photograph; as, to take a picture without a flash.

Syn: flashbulb, photoflash, flash lamp, flashgun.
[WordNet 1.5]

6. Same as {flashlight}. [informal]
[PJC]

7. (Journalism) A short news item providing recently received
and usually preliminary information about an event that is
considered important enough to interrupt normal
broadcasting or other news delivery services; also called
a {news flash} or {bulletin}.
[PJC]

{Flash light}, or {Flashing light}, a kind of light shown by
lighthouses, produced by the revolution of reflectors, so
as to show a flash of light every few seconds, alternating
with periods of dimness. --Knight.

{Flash in the pan}, the flashing of the priming in the pan of
a flintlock musket without discharging the piece; hence,
sudden, spasmodic effort that accomplishes nothing.
[1913 Webster]


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  • What Are Floaters and Flashes? - American Academy of Ophthalmology
    Flashes happen when the vitreous rubs or pulls on your retina As people age, it is common to see flashes occasionally Any new floaters or flashes should be examined by your ophthalmologist Sometimes people have light flashes that look like jagged lines, shimmering spots, or heat waves
  • Photopsias (Eye Flashes) - Cleveland Clinic
    You might wake up seeing flashes of bright light that then fade as the day continues Sometimes, flashes can occur with head, eye or body movement, especially in a dark room
  • Eye Floaters and Flashes: When to Worry and When It’s Normal
    Flashes appear as brief streaks of light, often in low-light conditions or when moving your eyes In many adults, these symptoms come from the gel inside the eye (vitreous) naturally shrinking and pulling away from the retina over time (posterior vitreous detachment, or PVD)
  • What are eye flashes and floaters and what can I do about them?
    Flashes, the quick streaks of light you describe, tend to be most noticeable in the dark They occur when the vitreous gel bumps, rubs, or tugs against the retina This action can lead to small areas of vitreous detachment, a sudden separation between the vitreous gel and the retina
  • How Long Do Eye Flashes Usually Last? Understanding What’s Normal and . . .
    While some flashes are harmless and temporary, others can signal serious problems, such as a retinal tear or detachment In this article, we’ll explore the typical duration of eye flashes, what factors affect how long they last, and when it’s time to seek medical attention
  • Floaters and Flashes: When to Worry and When to Wait
    Flashes often happen when the vitreous gel tugs or pulls on the retina This pulling stimulates the retina, and your brain interprets that stimulation as light, even though no light is actually entering your eye It is a mechanical effect, not a problem with how light is entering your eye
  • Floaters and Flashes: When Are They a Medical Emergency?
    Occasional flashes, which are when you see brief flickers of flashing lights in your vision, are also relatively common and are often related to normal aging changes inside the eye There are, however, instances when eye floaters and flashes are an emergency
  • Floaters vs. Flashes: What Are They and When Is It an Emergency?
    Understanding the difference between eye floaters vs flashes is essential, because in some cases, these symptoms can signal a serious eye condition This guide will help you understand what floaters and flashes are, what causes eye floaters, and most importantly, when to see an eye doctor immediately
  • Floaters and Flashes: What’s Normal and What’s an Emergency
    When you suddenly notice tiny specks drifting across your vision or brief flashes of light in your peripheral vision, it can be unsettling These visual disturbances are known as floaters and flashes
  • Eye Flashes and Floaters - Eye Disorders - Merck Manual Consumer Version
    Although most often flashes and floaters are not serious, people who have warning signs should see an eye doctor as soon as possible They may have a serious vitreous or retinal disorder, and waiting a few days, or sometimes even hours, may lead to a permanent loss of vision





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