How can doctors test for parasites/worms in the eyes because i see worm shapes, have seen them for the past 5 years....started to think it was normal?

Eye floaters?: It is very rare to have eye parasites and when people do vision is affected and other symptoms like eye redness are usually present. If you have no other eye problems but see squiggly shapes or "worm" like shapes they may be eye floaters. These are usually no problem; most people learn to ignore them. Have your ophthalmologist check to insure there is not another problem.

Floaters: It sounds like you are describing vitreous floaters. Tend to be normal and increase with age. Sudden changes in the number, appearance, light flashes, decreasing vision, and/or loss of vision requires an urgent evaluation. Parasitic infections are quite unusual & often elicit inflammation, pain, floaters, & decreased vision. Travel to endemic areas, eating raw/ undercooked meat, are other ideas.