Routine Vision Screening for Eye Tracking Studies
Eye tracking studies are likely to increase in frequency and influence in the study of human beauty. Many eye tracking studies do not report screening for refractive error. According to estimates derived from data gathered in the National Health and Nutrition Examination Survey (1999-2004), “clinically important refractive error affects half of the US population 20 years or older.” (Vitale, et.al., 2008) As a result, I would suggest routine vision screening of all subjects in eye tracking studies.
Susan Vitale; Leon Ellwein; Mary Frances Cotch; Frederick L. Ferris III; Robert Sperduto. “Prevalence of refractive error in the United States, 1999-2004”
Arch Ophthalmol 2008; 126: 1111-1119.
Blurry, resized Snellen Chart courtesy of Wikipedia Commons.