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Beyond Red & Green: New Tech for Colour Blindness

  • Leslie Andrachuk
    • Colour Blind

    Imagine you’re filling out an urgent medical form or navigating a new workplace software. A message flashes on the screen: “Please correct the fields highlighted in red.” You scan the page, but to your eyes, every box looks identical in a sea of muted tan and grey. For roughly 1 in 12 Canadian men and 1 in 200 women, this isn’t just a minor glitch, it’s a frequent, frustrating barrier.

    While we often think of colour blindness as a simple inability to see “red” or “green,” it is more accurately a breakdown in how the world communicates. In a society that relies heavily on colour-coded data, maps, and interfaces, over 1.5 million Canadians are forced to navigate a world where the most important instructions are sometimes invisible.

    The Science of the Cone

    Colour blindness

    At the back of the human eye sits the retina, home to specialized cells called cones. In a typical eye, three types of cones work in harmony to sense red, green, and blue light. Colour blindness occurs when one or more of these cone types are either missing or, more commonly, when their sensitivity “overlaps” too much.

    Because the genes responsible for red-green colour blindness are located on the X chromosome, the condition disproportionately affects those assigned male at birth. While women can be carriers, they rarely manifest the condition unless both X chromosomes carry the trait. Beyond genetics, colour blindness can also be acquired later in life through conditions like glaucoma, diabetes, or even as a side effect of certain long-term medications like Plaquenil.

    More Than a Crayon Label: Life on the Spectrum

    The most common form is Deuteranomaly, where green light shifts toward red, making the two colors appear muddy. More rare is Tritanopia, which affects the ability to tell blue from green. In the rarest cases, known as Achromatopsia, a person sees no color at all, navigating a world rendered entirely in shades of gray.

    For many, the limitations are subtle but constant. In the classroom, a child might struggle with color-coded maps or lose interest in art when they can’t find the “right” crayon. In adulthood, the hurdles become structural. Many career paths in Canada—such as becoming a commercial pilot, an electrician, or certain roles within the RCMP—have strict color-vision requirements for safety. Even the simple act of cooking a steak to “medium-rare” or checking if fruit is ripe becomes a game of texture and guesswork.

    Watch the video below from the Canadian Association of Optometrists for an in-depth explanation of colour blindness.

    What is colour blindness?

    Tech or Transformation?

    While there is currently no medical cure for congenital colour blindness, the market for assistive technology has exploded. Companies like EnChroma and Pilestone offer specialized glasses that use high-tech optical filters to “notch out” overlapping wavelengths of light.

    The reviews for these products which cost anywhere from $100 to $450 CAD are famously polarized. Some users experience an emotional “viral moment” where colours “pop” for the first time. Others find the effect underwhelming or notice only a slight tint. It is important to note that these glasses do not “fix” the eyes; they simply enhance contrast and require natural sunlight to work effectively.

    The Digital Accessibility Toolbox

    For many Canadians, the most effective tools for navigating a world of colour aren’t sitting on a shelf in a specialty store—they are already in their pockets and on their desks. While colour-correcting glasses often grab the headlines, “invisible” software features built into our phones, laptops, and even TVs are the real workhorses of daily accessibility.

    Here is how you can unlock the accessibility potential in the tech you already own.

    Apple: The Gold Standard of On-Device Support

    Apple has long integrated colour-blindness tools across iPhones, iPads, and Macs.

    Windows and ChromeOS: Designing for the Desktop

    For those working in office environments where spreadsheets and data-heavy charts are common, Windows and Chromebooks offer built-in relief.

    Android: Customization and Shortcuts

    Android devices (like Samsung, Pixel, and Motorola) offer some of the most flexible “shortcut” options for color correction.

    Why Built-In Tech Wins

    Unlike specialized glasses, these digital tools have three major advantages:

    Accuracy: Because they work at the software level, they can clarify digital interfaces such as that “highlighted in red” form field in a way that glasses often cannot.

    Zero Cost: They are already included in the price of your device.

    Adjustability: Unlike a physical lens, you can change the intensity of a digital filter depending on whether you’re in a dark room or bright sunlight.

    Ultimately, colour blindness is a reminder that no two people see the world in exactly the same way. As we become more aware of sensory differences, the world is slowly shifting. From transit maps that use patterns to inclusive web design, the world is becoming more navigable for the 1.5 million Canadians who see it just a little differently.

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    ~ Read more from The Health Insider ~

    Over 1.5 million Canadians live with color blindness. Discover the science, daily challenges, and the high-tech tools changing how they see.

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