This work by American Eastman Johnson caught my attention. The painting was done circa 1874, pre-dating the introduction of the sun visor by a couple decades. The hat however is functioning almost exclusievly as a sun visors-note the shadow on the woman's face. The hat is clearly important, even central (am I biased?) in the work. Note the lack of vibrant colors in the artist's palatte save the red border of the braided straw. Also, I believe she has changed the hat on her head from its intended position so that it serves as an aid to her reading. Form follows function.