According to Marmor, Monet’s work began to show a yellowish cast as his cataracts developed. To reveal how Monet saw the world, Marmor darkened images using Photoshop and reduced the levels of blue to replicate a yellowing effect. He also used blurring filters.
The results suggest that Monet’s vision corrupted his ability to see colors correctly. This — and not a desire to reflect the growing expressionist style of painting — may explain the abstract nature of Monet’s later work. —Randy Dotinga —Photoshop Re-Creates Aging Impressionists’ Eye on the World (Wired)
Here point your thunder, and exhaust your rage!
Yet shun their fault, who, scandalously nice,
Will needs mistake an author into vice;
All seems infected that th’ infected spy,
As all looks yellow to the jaundic’d eye. — Alexander Pope, “An Essay on Criticism“