System usability, user satisfaction and long-term adherence to mobile hyperacuity home monitoring-prospective...

To evaluate the usability and long-term adherence to the mobile hyperacuity app Alleye in patients with retinal pathology.

We enroled 72 patients (95 eyes) mainly treated for wet AMD (48/95; 50.5%). We calculated changes of clinical characteristics and the System Usability Score (SUS), and personal ratings of usefulness and number of tests performed per month at a follow-up visit of eighteen months.

At baseline, mean best corrected visual acuity (BCVA) was 74.9 letters (SD 14.8), mean age was 69.9 (SD 11.4) and 39/72 (54.2%) were female. Of included patients, 47/72 (65.2%) reported to use mobile devices daily. The retention rate until last follow-up was 73.6 % (53/72). The median SUS score at baseline was 90 (interquartile range (IQR) 82.5-95) and 92.5 (IQR 82.5-95) in the follow-up. No association between changes of SUS and clinical characteristics was seen. At baseline, 76.4% (55/72) stated that they would recommend the app to a friend, 83.3% (60/72) were very satisfied with the app and 58/72 (80.6%) of respondents said they trusted the app. These assessments remained similar among patients remaining on the program until the follow-up. Patients who dropped out of the study (n = 19) did not differ in age, gender, BCVA, and SUS at baseline, but stated that they did not use the mobile device daily (Odds Ratio 7.40 (95%CI: 2.32-23.65); p = 0.001).

The majority of users willing to perform home monitoring with the Alleye app are satisfied with the usability and have a positive attitude towards its trustworthiness and usefulness.