Question

the meaning of 'the bank swam before my eyes'

Answer 1

cloud one's vision. Usually said of floaters (clumps of fibers in the eye) or rings, spots, or flashes of light (called phosphenes). I stood up too quickly, causing flashes of light to swim before my eyes.

Answer 2

Explanation:

swim before (one's) eyes To appear in or cloud one's vision. Usually said of floaters (clumps of fibers in the eye) or rings, spots, or flashes of light (called phosphenes). I stood up too quickly, causing flashes of light to swim before my eyes.