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And floaters are particularly noticeable when you are looking at a uniform bright surface,
“飛蚊”也會很明顯比如當你盯著發(fā)光的表面時，
like a blank computer screen, snow, or a clear sky, where the consistency of the background makes them easier to distinguish.
像是空白的屏幕雪或是晴空，因為顏色一致的背景會使“飛蚊”更明顯。
The brighter the light is, the more your pupil contracts.
當看到的光越亮瞳孔會收縮的更厲害。
This has an effect similar to replacing a large diffuse light fixture with a single overhead light bulb,
這就好比把許多散射的光換成一個大的聚光燈
which also makes the shadow appear clearer.
也會使得陰影更加明顯。
There is another visual phenomenon that looks similar to floaters but is in fact unrelated.
另外也有一種視覺現(xiàn)象與飛蚊癥類似但與之無關(guān)。
If you've seen tiny dots of light darting about when looking at a bright blue sky,
當你仰望藍天時會看到小光點在快速閃動，
you've experienced what is known as the blue field entoptic phenomenon.
這被稱之為謝瑞爾氏現(xiàn)象。
In some ways, this is the opposite of seeing floaters.
這與看到飛蚊相反。
Here, you are not seeing shadows but little moving windows letting light through to your retina.
此時，你看到的不是陰影，而是一些移動的小開口讓光進入視網(wǎng)膜。
The windows are actually caused by white blood cells moving through the capillaries along your retina's surface.
這些開口是由白細胞造成的白細胞穿梭在視網(wǎng)膜表面的毛細血管。
These leukocytes can be so large that they nearly fill a capillary causing a plasma space to open up in front of them.
白細胞可以大到填滿整個毛細血管，這導致了白細胞身前的空隙。
