Tests that vision deficiencies can be emulated.
<p>Emulating "none":
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAIAAAADnC86AAAAPUlEQVR4nOzWsQ0AIBADsYAYnM1hh0eCAt8CLtJkZKbeXKnW8ygwGAwGg8Hg+7Wk/ptOsjEYDAaDweCP4A0AAP///mbGxQAAAAZJREFUAwD/MQNQDYjgDwAAAABJRU5ErkJggg==">
<p>Emulating "achromatopsia":
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAIAAAADnC86AAAAP0lEQVR4nOzWsQ0AIAwDwQixbmbOKuyQSFBwv8AVbrwzM7pVVXRb8SgwGAwGg8Hg++3Jb5pkYzAYDAaDwR/BBwAA//84y5ToAAAABklEQVQDAPGaBtZB1vftAAAAAElFTkSuQmCC">
<p>Emulating "blurredVision":
<img src="data:image/png;base64,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">
<p>Emulating "reducedContrast":
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAIAAAADnC86AAAAQklEQVR4nOzWMQ0AIBAEwQ9BGq6xQoIVPPwnUDBrYIprrs81I90eka3Fo8BgMBgMBoPv1yu/qZKNwWAwGAwGfwQfAAAA///QNVklAAAABklEQVQDACRhBO1q8KnRAAAAAElFTkSuQmCC">
<p>Emulating "none":
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAIAAAADnC86AAAAPUlEQVR4nOzWsQ0AIBADsYAYnM1hh0eCAt8CLtJkZKbeXKnW8ygwGAwGg8Hg+7Wk/ptOsjEYDAaDweCP4A0AAP///mbGxQAAAAZJREFUAwD/MQNQDYjgDwAAAABJRU5ErkJggg==">
<p>Emulating "deuteranopia":
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAIAAAADnC86AAAAR0lEQVR4nOzRQRWAIAAFwa/PEJaxkAXMYD4qEIMDHTjAgdkCc9jre++M9pea0c4sCgwGg8FgMHh+R56WFXkMBoPBYDB4I7gDAAD//yOdMbwAAAAGSURBVAMAJnEExJ5tWkYAAAAASUVORK5CYII=">
<p>Emulating "none":
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAIAAAADnC86AAAAPUlEQVR4nOzWsQ0AIBADsYAYnM1hh0eCAt8CLtJkZKbeXKnW8ygwGAwGg8Hg+7Wk/ptOsjEYDAaDweCP4A0AAP///mbGxQAAAAZJREFUAwD/MQNQDYjgDwAAAABJRU5ErkJggg==">
<p>Emulating "protanopia":
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAIAAAADnC86AAAARklEQVR4nOzWsQ3AIBAEwbflJt0GORHFUgb08EgQMNvABJfc10qkq31EtjcOBQaDwWAwGLy/J/78b1rJxmAwGAwGgy+CJwAAAP//xf7i4QAAAAZJREFUAwCNDAUCMzJphQAAAABJRU5ErkJggg==">
<p>Emulating "tritanopia":
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAIAAAADnC86AAAAQklEQVR4nOzWMQ0AIBAEwQ9BDdqQgGcs4OE/gYJZA1Nccz3WjHR7RLYWjwKDwWAwGAy+X6/8pko2BoPBYDAY/BF8AAAA///bdmMYAAAABklEQVQDAFAxA2+u5sRhAAAAAElFTkSuQmCC">
<p>Emulating "tritanopia":
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAIAAAADnC86AAAAQklEQVR4nOzWMQ0AIBAEwQ9BDdqQgGcs4OE/gYJZA1Nccz3WjHR7RLYWjwKDwWAwGAy+X6/8pko2BoPBYDAY/BF8AAAA///bdmMYAAAABklEQVQDAFAxA2+u5sRhAAAAAElFTkSuQmCC">
<p>Emulating "some-invalid-deficiency":
{
  "code": -32602,
  "message": "Unknown vision deficiency type"
}
<p>Emulating "":
{
  "code": -32602,
  "message": "Unknown vision deficiency type"
}
<p>Emulating "achromatomaly":
{
  "code": -32602,
  "message": "Unknown vision deficiency type"
}
<p>Emulating "deuteranomaly":
{
  "code": -32602,
  "message": "Unknown vision deficiency type"
}
<p>Emulating "protanomaly":
{
  "code": -32602,
  "message": "Unknown vision deficiency type"
}
<p>Emulating "tritanomaly":
{
  "code": -32602,
  "message": "Unknown vision deficiency type"
}
<p>Navigating&mldr;
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAIAAAADnC86AAAAQklEQVR4nOzWMQ0AIBAEwQ9BDdqQgGcs4OE/gYJZA1Nccz3WjHR7RLYWjwKDwWAwGAy+X6/8pko2BoPBYDAY/BF8AAAA///bdmMYAAAABklEQVQDAFAxA2+u5sRhAAAAAElFTkSuQmCC">
<p>Emulating "achromatopsia":
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAoCAIAAAADnC86AAAAP0lEQVR4nOzWsQ0AIAwDwQixbmbOKuyQSFBwv8AVbrwzM7pVVXRb8SgwGAwGg8Hg++3Jb5pkYzAYDAaDwR/BBwAA//84y5ToAAAABklEQVQDAPGaBtZB1vftAAAAAElFTkSuQmCC">