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Because the space and the white blood cells are both more transparent to blue light than the red blood cells normally present in capillaries,
由于這些空隙和白細胞本身相比于血管中的紅細胞更能讓藍光透過我們，
we see a moving dot of light wherever this happens, following the paths of your capillaries and moving in time with your pulse.
因此看到小光點沿著毛細血管移動也隨著脈搏而移動。
Under ideal viewing conditions, you might even see what looks like a dark tail following the dot.
在理想狀況下甚至會看到光點后有條黑尾巴。
This is the red blood cells that have bunched up behind the leukocyte.
這是白細胞身后堆積的紅細胞造成的。
Some science museums have an exhibit which consists of a screen of blue light,
有些科技館中會展覽出一整屏幕的藍光
allowing you to see these blue sky sprites much more clearly than you normally would.
這會讓你跟清楚的看到這一現象。
While everybody's eyes experience these sort of effects, the number and type vary greatly.
因為雖然每個人都會經歷這些現象，每個人看到的程度都不同。
In the case of floaters, they often go unnoticed, as our brain learns to ignore them.
就飛蚊癥而言大多數會被我們的大腦所忽視。
However, abnormally numerous or large floaters that interfere with vision
但是數目異常多或者大到影響視線的飛蚊，
may be a sign of a more serious condition, requiring immediate medical treatment.
可能意味著你需要緊急醫療救助。
But the majority of the time entoptic phenomena, such as floaters and blue sky sprites,
但是多數的眼內現象，比如飛蚊或者謝瑞爾氏現象，
are just a gentle reminder that what we think we see depends just as much on our biology and minds as it does on the external world.
只是委婉地提醒我們自認為看到的東西取決于我們的生理和大腦，就和取決于外部世界一樣。
