EYE FLOATERS / MYODESOPSIA

Can you swim? Do you like the feel of floating above the water? Do you know that there is a sickness named EYE FLOATERS? Let me tell you!
Eye floaters appear as small spots that drift through your field of vision. They may stand out when you look at something bright, like white paper or a blue sky.
They come in many different shapes:

• Black or gray dots
• Squiggly lines
• Threadlike strands, which can be knobby and almost see-through
• Cobwebs
• Rings

Most floaters are small flecks of a protein called collagen. They’re part of a gel-like substance in the back of your eye called the vitreous ( humor which plays a crucial role in supporting the posterior side of the lens).
As you age, the protein fibers that make up the vitreous shrink down to little shreds that clump together. The shadows they cast on your retina are floaters. If you see a flash, it’s because the vitreous has pulled away from the retina. If that happens, see your eye doctor ASAP.
These changes can happen at any age, but usually occur between 50 and 75. You’re more likely to have them if you’re nearsighted or have had cataract surgery.
It’s rare, but floaters can also result from:

• Eye disease
• Eye injury
• Diabetic retinopathy
• Crystal-like deposits that form in the vitreous
• Eye tumors

If you only have a few eye floaters that don't change over time, don’t sweat it.
Go to the doctor ASAP if you notice:

• A sudden increase in the number of floaters
• Flashes of light
• A loss of side vision
• Changes that come on quickly and get worse over time
• Floaters after eye surgery or eye trauma
• Eye pain

Choose a doctor who has experience with retina problems. If you don’t get help right away, you could lose your sight.

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Sources: https://www.google.com.tw/url?sa=t&rct=j&q=&esrc=s&source=web&cd=9&cad=rja&uact=8&ved=0ahUKEwi9tcrY1MnWAhUBypQKHbojBFYQFghIMAg&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FVitreous_chamber&usg=AFQjCNFuC7fKT24GL0VQ-sFG8Cp9QcgUIA
http://www.webmd.com/eye-health/benign-eye-floaters#2