Usability Assessment as a Guide to Improve the System Design of a Corneal Topographer
The study aimed to assess the efficiency, efficacy and satisfaction of a redesigned portable corneal topography system to identify design solutions for system improvement. Twelve participants had to complete different tasks interacting with the software and the other elements of the system in a controlled scenario. After, a Retrospective Think Aloud was carried out focusing on the most challenging tasks during the system interaction. Finally, a satisfaction questionnaire was used to assess user perception. The most frequent errors and difficulties were identified along with the participants’ insights into the design elements for improvement of the system. Design solutions were generated to address software deficiencies and to improve the design of all aspects of the system. Usability analysis of software showed high relevance in the correct usage of the entire system, and along with the quick guide provides most of the feedback to understand the proper use of the handheld device.
KeywordsSystem Usability Medical devices Retrospective Think Aloud
CONACYT supported this work through the Fondo de Innovación Tecnológica FIT [grant number ECO-2016-C01-274898]. We thank Oscar A. Ramos Montes and Esther Alejandra Malagon Rojas from the FESI, UNAM for helping with the process of participant recruitment and managing the facilities to run this research.
- 3.Wiklund, M.E., Kendler, J., Strochlic, A.Y.: Usability Testing of Medical Devices. CRC Press, Boca Raton (2015)Google Scholar
- 5.Adams, A.: Usability testing in information design. In: Zwaga, H., Boersema, T., Hoonhout, H. (eds.) Visual Information for Everyday Use: Design and Research Perspectives, pp. 3–20. CRC Press (2003)Google Scholar
- 6.Aceves-González, C., Galindo-Estupiñan, Z.T., Landa-Avila, I.C., Díaz-Gutiérrez, C., Prado-Jiménez, S.D.: Usability assessment of a portable corneal topography device. In: International Conference on Applied Human Factors and Ergonomics, pp. 639–650. Springer, Cham (2018)Google Scholar
- 7.Paz, F., Pow-Sang, J.A.: A systematic mapping review of usability evaluation methods for software development process. Int. J. Softw. Eng. Appl. 10(1), 165–178 (2016)Google Scholar
- 8.Leventhal, L., Barnes, J.: Usability Engineering: Process, Products and Examples. Prentice-Hall, Upper Saddle River (2007)Google Scholar
- 10.De Leon Zuloaga, C.D.: Evaluación del efecto de tres tipos de interfaz en la usabilidad de una receta en pacientes con diabetes mellitus tipo 2, Tesis de Maestría en Ergonomía. Universidad de Guadalajara, México (2017)Google Scholar
- 11.Vu, K.P.L., Proctor, R.W.: Handbook of Human Factors in Web Design. CRC Press, Boca Raton (2011)Google Scholar
- 13.Myers, B.A., Bhatnagar, R., Nichols, J., Peck, C.H., Kong, D., Miller, R., Long, A.C.: Interacting at a distance: measuring the performance of laser pointers and other devices. In: Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, pp. 33–40. ACM (2002)Google Scholar
- 14.Jordan, P.W.: An Introduction to Usability. CRC Press, Boca Raton (1998)Google Scholar
- 15.Saffer, D.: Microinteractions: Designing with Details. O’Reilly Media Inc., Sebastopol (2013)Google Scholar