How did cataracts affect the colors in Claude Monet’s later paintings?

As Claude Monet suffered from cataracts beginning in 1908, his vision became increasingly impaired, which significantly influenced the aesthetic of his later works.

The primary effect of the cataracts on his color palette was the emergence of a pervasive reddish tone in his paintings. This shift in color perception is clearly demonstrated in works such as his depictions of the Japanese Footbridge, which, unlike his earlier, more clearly delineated and naturally colored versions, are characterized by blurry forms and dominant red hues.

Beyond color distortion, the progression of his cataracts contributed to a more abstract style. As his ability to perceive fine detail diminished, his brushwork became thicker and more energetic, causing his subjects—such as trees, plants, and water—to dissolve into swirls of light and color. Monet continued to paint despite these visual challenges until he received effective treatment for his cataracts in 1923.12