In professional conversations, the first topics that arise when discussing digital accessibility are often those that the eye immediately picks up: insufficient contrast, an inconspicuous button, or difficult-to-read text. These elements are important, but they only represent a fraction of the obstacles encountered by users.
Why do some accessibility issues remain so difficult to identify within organisations? Why can interfaces deemed satisfactory internally continue to be inaccessible for some users? This difficulty is not solely due to technical criteria: it is also linked to a way of perceiving and evaluating digital interfaces.
In this article, discover why certain obstacles go unnoticed, how this bias influences design decisions, and how it can hinder a genuine approach to digital accessibility.
Why are some accessibility barriers difficult to identify?
The spontaneous assessment of a site is therefore often based on a visual impression: harmony of colours, rhythm of spacing, overall balance. In this context, a site can seem accomplished, coherent and sometimes even exemplary. But this feeling is just one of many.
These disparities are not anecdotal. They create invisible situations of exclusion for the teams that design and run the systems. A service may be perceived as functional internally while being unusable for a portion of users.
A design bias, not a lack of skill
It would be easy to see this as a lack of skills, but it is above all a perceptual bias. Historically and culturally, the Web has been shaped by vision-centred approaches. (and the mouse).
Training, tools and professional reflexes still encourage this perspective: scan, click, move fast. Nothing really prepares you to read a page entirely from the keyboard, to interpret a structure with a screen reader or to understand what an interface becomes when interactions are based on other capabilities.
This perceptual bias limits the way we imagine the experience, not out of ill will, but because another reality remains unexplored. It explains why many devices pass internal validations while remaining partially inaccessible in real-world situations.
Why does this bias tend to persist in organisations?
Several structural factors explain the persistence of this bias in digital projects.
The absence of confrontation with real-world usage
The absence of confrontation with real-world usage is a first determining factor. Interfaces are designed, tested, and validated without direct exposure to varied usage situations. Teams project their own browsing habits without perceiving the experiential differences that other users may encounter.
Validations carried out by homogenous profiles
Internal homogeneous validation reinforces this phenomenon. Tests are often carried out by similar profiles, sharing the same frames of reference and interaction capabilities. This homogeneous framework reproduces a unique prism and limits the detection of obstacles.
Accessibility treated as a technical constraint
Positioning accessibility as a technical constraint is another key factor. When addressed downstream, as a compliance or remediation step, it doesn't challenge initial design choices. Interfaces are then adjusted, but rarely rethought.
These mechanisms are not due to a lack of expertise. They reflect an organisation of work which does not permit a full understanding of the diversity of uses.
How to broaden one's perspective on digital accessibility?
Broadening one's perspective on accessibility is not about memorising more criteria or increasing the number of control tools. It is, above all, about accepting that one's own way of using the Web is just one experience among others.
This dawning awareness gradually leads to changes in design practices. An interface is no longer evaluated solely on its visual appearance but also on how it is navigated with a keyboard, interpreted by a screen reader, or used in contexts very different from those of the teams that designed it.
This evolution of practices also involves regularly confronting projects with varied uses. Observing real users, integrating different profiles into testing phases, or supplementing automatic checks with human evaluations often reveals obstacles that would have remained invisible during traditional validation.
Finally, accessibility is best considered as a dimension of the overall quality of a digital service, rather than a mere regulatory requirement. The earlier it is integrated into the design process, the more it influences design choices, user journeys, and content. Consequently, fewer corrections are needed, as obstacles are anticipated rather than discovered retrospectively.
Digital accessibility It doesn't start with technical fixes. It starts with an awareness: that of the limits of one's own perspective. As long as organisations design solely from their own usage, some obstacles will remain invisible. And what remains invisible can neither be corrected nor managed.