Opinión de la Comisión Europea sobre las capas de accesibilidad

En Accessibility overlays:

Automatically repairing accessibility issues requires that those issues can be found automatically. Claims that a website can be made fully compliant without manual intervention are not realistic, since no automated tool can cover all the WCAG 2.1 level A and AA criteria. It is even less realistic to expect to detect automatically the additional EN 301549 criteria. Moreover, automatic repair is more challenging than the automatic detection of accessibility failures. 

In addition, some overlay tools have been reported to interfere with the assistive technologies used by people with disabilities. In other words, overlay tools may make a website less accessible for some users.

Tools claiming to make a site fully compliant can be distinguished from a different category of tools, namely widgets built into webpages that allow users to adapt certain aspects of a site to their own needs or preferences. These include the ATbar and UI Options These tools do not claim to solve any accessibility issues on a site but assume (and possibly require) a basic level of accessibility.

Neither of the above categories of tools can substitute for the manual work of making a site accessible. DG COMM cannot endorse any tools or products that fall into the categories of overlay tools or widgets.