TY - JOUR
T1 - Evaluation of tablet computers for visual function assessment
AU - Bodduluri, Lakshmi
AU - Boon, Mei Ying
AU - Dain, Stephen J.
N1 - Publisher Copyright:
© 2016, Psychonomic Society, Inc.
PY - 2017/4/1
Y1 - 2017/4/1
N2 - Recent advances in technology and the increased use of tablet computers for mobile health applications such as vision testing necessitate an understanding of the behavior of the displays of such devices, to facilitate the reproduction of existing or the development of new vision assessment tests. The purpose of this study was to investigate the physical characteristics of one model of tablet computer (iPad mini Retina display) with regard to display consistency across a set of devices (15) and their potential application as clinical vision assessment tools. Once the tablet computer was switched on, it required about 13 min to reach luminance stability, while chromaticity remained constant. The luminance output of the device remained stable until a battery level of 5%. Luminance varied from center to peripheral locations of the display and with viewing angle, whereas the chromaticity did not vary. A minimal (1%) variation in luminance was observed due to temperature, and once again chromaticity remained constant. Also, these devices showed good temporal stability of luminance and chromaticity. All 15 tablet computers showed gamma functions approximating the standard gamma (2.20) and showed similar color gamut sizes, except for the blue primary, which displayed minimal variations. The physical characteristics across the 15 devices were similar and are known, thereby facilitating the use of this model of tablet computer as visual stimulus displays.
AB - Recent advances in technology and the increased use of tablet computers for mobile health applications such as vision testing necessitate an understanding of the behavior of the displays of such devices, to facilitate the reproduction of existing or the development of new vision assessment tests. The purpose of this study was to investigate the physical characteristics of one model of tablet computer (iPad mini Retina display) with regard to display consistency across a set of devices (15) and their potential application as clinical vision assessment tools. Once the tablet computer was switched on, it required about 13 min to reach luminance stability, while chromaticity remained constant. The luminance output of the device remained stable until a battery level of 5%. Luminance varied from center to peripheral locations of the display and with viewing angle, whereas the chromaticity did not vary. A minimal (1%) variation in luminance was observed due to temperature, and once again chromaticity remained constant. Also, these devices showed good temporal stability of luminance and chromaticity. All 15 tablet computers showed gamma functions approximating the standard gamma (2.20) and showed similar color gamut sizes, except for the blue primary, which displayed minimal variations. The physical characteristics across the 15 devices were similar and are known, thereby facilitating the use of this model of tablet computer as visual stimulus displays.
KW - Color gamut
KW - Gamma function
KW - iPad mini Retina display
KW - Mobile health applications
KW - Visual functions
UR - http://www.scopus.com/inward/record.url?scp=84961797544&partnerID=8YFLogxK
U2 - 10.3758/s13428-016-0725-1
DO - 10.3758/s13428-016-0725-1
M3 - Article
C2 - 27004485
AN - SCOPUS:84961797544
SN - 1554-351X
VL - 49
SP - 548
EP - 558
JO - Behavior Research Methods
JF - Behavior Research Methods
IS - 2
ER -