Positive display polarity is advantageous for both younger and older adults

The effect of display polarity on visual acuity and proofreading performance was investigated for younger and older adults. An advantage of positive polarity (dark characters on light background) over negative polarity (light characters on dark background) was expected for younger adults, but the effects on older adults were ambiguous. Light scatter due to residues in the senescent lens and vitreous humour could reverse the typical advantage of positive polarity. However, age-related changes lead to a decline in retinal illuminance. Brighter positive polarity displays should help to compensate for this decline and, accordingly, lead to better performance than darker negative polarity displays. Participants conducted a visual acuity test with black optotypes on white background or white optotypes on black background and performed a proofreading task in the same polarity. A positive polarity advantage was found for both age groups. The presentation in positive polarity is recommended for all ages. Practitioner summary: In an ageing society, age-related vision changes need to be considered when designing digital displays. Visual acuity testing and a proofreading task revealed a positive polarity advantage for younger and older adults. Dark characters on light background lead to better legibility and are strongly recommended independent of observer's age.

[1]  Jacob Cohen.  Statistical Power Analysis for the Behavioral Sciences , 1969, The SAGE Encyclopedia of Research Design.

[2]  Marco Lombardo,et al.  Wave aberration of human eyes and new descriptors of image optical quality and visual performance. , 2010, Journal of cataract and refractive surgery.

[3]  Axel Buchner,et al.  The advantage of positive text-background polarity is due to high display luminance , 2009, Ergonomics.

[4]  A. Buchner,et al.  Text – background polarity affects performance irrespective of ambient illumination and colour contrast , 2007, Ergonomics.

[5]  Edgar Erdfelder,et al.  G*Power 3: A flexible statistical power analysis program for the social, behavioral, and biomedical sciences , 2007, Behavior research methods.

[6]  G. Haegerstrom-Portnoy,et al.  Chapter 2 – Normal Age-Related Vision Changes , 2007 .

[7]  Michael Bach,et al.  The Freiburg Visual Acuity Test-Variability unchanged by post-hoc re-analysis , 2007, Graefe's Archive for Clinical and Experimental Ophthalmology.

[8]  Konstantinos Papadopoulos,et al.  Accessibility assistance for visually-impaired people in digital texts , 2005 .

[9]  Alan H. S. Chan,et al.  Effect of display factors on Chinese reading times, comprehension scores and preferences , 2005, Behav. Inf. Technol..

[10]  J. Sebag,et al.  Age-related changes in human vitreous structure , 2005, Graefe's Archive for Clinical and Experimental Ophthalmology.

[11]  J. Kessler,et al.  DemTect: a new, sensitive cognitive screening test to support the diagnosis of mild cognitive impairment and early dementia , 2004, International journal of geriatric psychiatry.

[12]  G. Westheimer,et al.  Visual Acuity with Reversed-Contrast Charts: II. Clinical Investigation , 2003, Optometry and vision science : official publication of the American Academy of Optometry.

[13]  An-Hsiang Wang,et al.  Effects of VDT leading-display design on visual performance of users in handling static and dynamic display information dual-tasks , 2003 .

[14]  Yan Wang,et al.  Changes of higher order aberration with various pupil sizes in the myopic eye. , 2003, Journal of refractive surgery.

[15]  Peter Boyce,et al.  Lighting for the Elderly , 2003 .

[16]  Paul van Schaik,et al.  The effect of text and background colour on visual search of Web pages , 2002 .

[17]  Markus Heinrichs,et al.  Der Mehrdimensionale Befindlichkeitsfragebogen (MDBF) , 2002 .

[18]  G. Westheimer.  Updating the classical approach to visual acuity , 2001, Clinical & experimental optometry.

[19]  Gordon E Legge,et al.  Psychophysics of reading XX. Linking letter recognition to reading speed in central and peripheral vision , 2001, Vision Research.

[20]  F. Boscia,et al.  Protein oxidation and lens opacity in humans. , 2000, Investigative ophthalmology & visual science.

[21]  An-Hsiang Wang,et al.  Effects of polarity and luminance contrast on visual performance and VDT display quality , 2000 .

[22]  Kong-King Shieh,et al.  Effects of reflection and polarity on LCD viewing distance , 2000 .

[23]  M. Bach,et al.  Sehschärfebestimmung nach Europäischer Norm: wissenschaftliche Grundlagen und Möglichkeiten der automatischen Messung , 1998 .

[24]  Junzhong Liang,et al.  Aberrations and retinal image quality of the normal human eye. , 1997, Journal of the Optical Society of America. A, Optics, image science, and vision.

[25]  G Westheimer,et al.  Influence of ocular light scatter on the eye's optical performance. , 1995, Journal of the Optical Society of America. A, Optics, image science, and vision.

[26]  Gavriel Salvendy,et al.  Visual comfort in using different VDT screens , 1993, Int. J. Hum. Comput. Interact..

[27]  S Saito,et al.  Visual comfort in VDT operation: physiological resting states of the eye. , 1993, Industrial health.

[28]  M Wagner,et al.  The aging eye. , 1991, Interiors.

[29]  S. Pastoor,et al.  Legibility and Subjective Preference for Color Combinations in Text , 1990, Human factors.

[30]  S Saito,et al.  How display polarity and lighting conditions affect the pupil size of VDT operators. , 1990, Ergonomics.

[31]  R. Weale,et al.  Presbyopia toward the end of the 20th century. , 1989, Survey of ophthalmology.

[32]  H. Heuer,et al.  [Rest position of the eyes and its effect on viewing distance and visual fatigue in computer display work]. , 1989, Zeitschrift fur experimentelle und angewandte Psychologie.

[33]  Stephen E. Newstead,et al.  Efforts of display format on proof-reading with VDUs , 1988 .

[34]  Gordon E. Legge,et al.  Psychophysics of reading—V. The role of contrast in normal vision , 1987, Vision Research.

[35]  V Barnes,et al.  Reading Is Slower from CRT Displays than from Paper: Attempts to Isolate a Single-Variable Explanation , 1987, Human factors.

[36]  Uwe Pawlak,et al.  Ergonomic aspects of image polarity , 1986 .

[37]  W. Cushman.  Reading from Microfiche, a VDT, and the Printed Page: Subjective Fatigue and Performance , 1986, Human factors.

[38]  Gordon E. Legge,et al.  Psychophysics of reading—II. Low vision , 1985, Vision Research.

[39]  G. Legge,et al.  Psychophysics of reading—I. Normal vision , 1985, Vision Research.

[40]  Helmut Krueger,et al.  Lighting characteristics, legibility and visual comfort of displays , 1984 .

[41]  Martin S. Banks,et al.  Depth of focus, eye size and visual acuity , 1980, Vision Research.

[42]  J. Silver,et al.  Reading Aids for the Partially Sighted: A Systematic Classification and Procedure for Prescribing , 1978 .

[43]  W. N. Charman,et al.  Pupil Diameter and the Depth-of-field of the Human Eye as Measured by Laser Speckle , 1977 .

[44]  L. L. Sloan.  READING AIDS FOR THE PARTIALLY SIGHTED , 1977 .

[45]  F. Blodi.  Altern und Auge , 1972 .

[46]  F. Campbell,et al.  Optical quality of the human eye , 1966, The Journal of physiology.