This was a transversal and quantitative study divided into two stages. The first stage consisted of creating and developing the application for iOS and Android platforms. The final stage consisted of testing the application, verifying its operation, usability, and acceptance. All the participants signed the informed consent form.
The “GlaucoCheck”'s entire layout and interface were designed and manufactured to be intuitive, and easy to visualize, as many patients with glaucoma already experience some vision loss, enabling telemedicine functions. Thus, when accessing the application, the patient will be faced with an initial screen, with six options to trigger: "About Glaucoma", "My Eye Drops", "Treatment", "My Exams", "My Pressure" and "Questions”.
The topic "About Glaucoma" consists in recording some quick videos, with themes according to the major doubts and complaints of patients affect by glaucoma and the general population.
In the "My eye drops" section, there is an option to select the medications that the patient currently uses and set the time to use it, including notifications at the exact chosen time. Furthermore, by selecting the "Treatment" option there is the possibility to store information about patients’ surgical treatments (Figure 1).
. "My Exams” enables the registration of performed exams, such as Gonioscopy, Pachymetry, Visual Field, Retinography, and OCT of nerves and fibers (Figure 2).
In the section "My Pressure", the patient can store the values of measured Intraocular Pressure (IOP), enabling the monitoring of the variation during time and automatically generating follow-up graphs.
In "Questions" menu, there are available frequently asked questions (FAQ) among patients with glaucoma, with the respective answers. Beyond that, there is also a telecare option to send e-mails with new questions for the developers, facilitating the communication between patients and professionals.
Mobile application customer feedback
The inclusion criteria were patients suffering from glaucoma who were registered in the Instituto Cearense de Oftalmologia or relatives responsible for those patients who were familiar with iOS ar Android platforms. Participants who did not suffer from glaucoma or did not have a relative with glaucoma, illiterate volunteers, and participants unfamiliar with smartphones and iOS or Android platforms
The volunteers of this research were chosen using a rational choice sample that is justified or not in a non-random way. The choice was intentional or by convenience, considering the study group's characteristics or the researcher's knowledge of what they were investigating .
Initially, an informal conversation about the research occurred, clarifying doubts and inviting volunteer's formal invitation to participate and sign the consent form.
After that, the "User Guide" was delivered to the volunteer, which was an explanatory document that clearly shows all the functionality of the application and its tools. Then the volunteer's first contact with the “GlaucoCheck” application occurred through a smartphone base unit with the iOS or Android operating system.
Under the evaluator's supervision, the volunteer was encouraged to explore all the functionalities contained in the application. This whole process occurred with the evaluator's minimum intervention.
Volunteers were finally instructed to fill up a questionnaire containing questions related to their disease and the System Usability Scale, a scale that is characterized as an easy-to-apply method to investigate the system's usability, where each question contains five answer options that follow the 5-point Likert scale (completely disagree, disagree, neutral, agree, and completely agree) .
The data extracted from the SUS questionnaire answered by the physicians were exported to the Statistical Package for the Social Sciences (SPSS) software version 20.0 for Windows, in which the averages of each item of the SUS questionnaire and the total score of this questionnaire (0-100) were disposed.