Etiology - The main cause of floaters are simply age-related changes to the eye. However, they can also be a product of a more serious issue like an eye injury or inflammation.
Symptoms - Specks in vision (often appear as spots or threadlike), shadowy vision, and appearance of grayish shapes.
Details - Floaters are known as tiny-to-large specks that drift across one's vision and are especially noticeable in a bright, plain background. They are composed of collagen clumps produced by the vitreous (watery substance in the eye). Over time, the brain often learns to subconsciously ignore their presence.
Treatment - Most floaters don't require treatment since they are usually harmless, although some can be surgically removed, but such methods are considered risky and often unnecessary. However, floaters do sometimes act as an underlying sign of another eye condition/injury in need of seperate treatment.
How an afternoon sky-like background may appear to someone with floaters in present in their vision.
Photo Creds: SK Retina