I was told a very small retinal hole is "asymptomatic". can retinal holes look like floaters? my floaters show up more against monochromatic b/r.

Asymptomatic=: No symptoms. Holes may evolve into detachment. They are generally less serious than retinal tears. Floaters on the other hand occur as the vitreous gel becomes liquid. They are not dangerous but occur often times along with tears in the retina or holes. It is unlikely that you can even detect the hole in your vision. Dilated eye exam is critical to monitor these types of retinal defects.

Can be serious: Retinal holes do not look like floaters, though they can be associated. The most common cause of floaters is degeneration of the vitreous fluid. The floaters gradually get worse, and persist. Sudden increase in floaters may be caused by vitreous separation (detachment) and may associated with a retinal tear or detachment, and an urgent eye exam is advisable.