Monet had his lens removed when his eyes became diseased

Through the eyes of Monet – and his cataracts

In 1912, Claude Monet learned that he had cataracts, a disease of the eye that seems to have left its mark on his work. By distorting the light coming into the eye, cataracts reduce the capacity to perceive blue and purple and accentuate perception of warmer colors
The sender is true

Ais the correct one.

Pretty sure it is d