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It's also important to keep in mind that some disabilities are temporary.

Someone with normally good vision could have undergone a procedure that leaves them with reduced vision for a while as they recover.

Someone could have a broken hand, or tendinitis, or any number of other temporary conditions that affect precise motion, vision or other physical abilities.

Hell it could be something as simple as they are holding their phone in their other hand and still need to navigate your interface so they have to tab through it with a keyboard instead of using a mouse or trackpad.

These people may still need to use your product during this time when their capacities are reduced in some way.

Accessibility benefits much more than just people with serious and visible disabilities. Accessible applications are better experiences for all users.