He struggled to free his arms from the invisible bonds, his eyesight darkening until he dropped into unconsciousness.
Besides, their eyesight is pretty bad.
But Xander's enhanced eyesight was able to see one half of the strange interaction.
In his old age he was blinded by cataract, but recovered his eyesight by the operation of couching.
In 1841 Lowe moved to London, to read for the Bar ("called" 1842); but his eyesight showed signs of serious weakness, and, acting on medical advice, he determined to try his fortune in the colonies rather than in London.