My mother was an expert at knitting and crocheting. In her later years, she opened her own yarn shop where she sold her handmade, colorful sweaters. The sweaters were a big hit with teenage girls and young women.  My mother used a patchwork design, combining bright colors that didn’t match. Sales were good until my mother’s cataracts grew so thick that she had to have surgery.  The surgeon said that they were the thickest that she had ever seen.  After my mother recovered and went back to work, she was horrified to see the colors of her best selling sweaters.  “These are atrocious” she said. “The colors don’t match at all”.  She set about to correct her ‘mistake’ but to her dismay, the new, correctly matched color combinations didn’t sell and business plummeted.  Her selection of colors before surgery was apparently more appealing to the taste of her customers than they were to her.  The morale of the story: Sometimes it’s better not to see what you’re doing!