Small, semi-transparent, or cloudy specks or particles within the vitreous (the clear, jelly-like fluid that fills the inside of your eyes). They appear as specks of various shapes and sizes, threadlike strands, or cobwebs. Since they are within your eyes, they move as your eyes move and seem to dart away when you try to look at them directly. Spots are often caused by small flecks of protein or other matter trapped during the formation of your eyes before birth. They can also result from deterioration of the vitreous fluid due to aging; or from certain eye diseases or injuries.