A blinder is an item that blocks or obscures vision, typically used in reference to a type of eyewear designed to prevent glare from sunlight or other bright light sources.
Usage examples
The racehorse wore blinkers, also known as blinders, to help him stay focused on the track and not get distracted by his surroundings.
The politician's stubbornness and refusal to consider alternate viewpoints can be seen as wearing blinders, as he is only focused on his own agenda.
The company's management team was so focused on their current successes that they had blinders on to the upcoming market trends and failed to adapt accordingly.
The artist's creativity seemed limitless, as if she had removed the blinders of conventionality and was able to think outside the box.
The dog had blinders on during his training sessions, helping him to remain calm and undistracted by other dogs or people passing by.