Color Blind Glasses, Careers & Licensing: Color Vision Requirements Explained

Color blindness, also called color vision deficiency, means a person sees certain colors differently than most people do. It is usually described by type: protan (red-related), deutan (green-related) or tritan (blue-yellow-related), and by severity from mild to more significant. It is more common in men, and it is often inherited, though some people develop changes later in life.

Many careers rely on telling colors apart quickly and reliably: reading signal lights, wiring, charts, warning displays or color-coded labels. Because of this, some employers and licensing bodies include a color vision screening as part of their requirements. Fields people often ask about include aviation, military service, law enforcement, commercial driving, electrical trades and maritime work.

Requirements differ widely. They depend on the specific job, employer, agency and licensing authority, and they change over time. Some roles have strict standards, some allow alternative tests or limited restrictions, and many have no color vision requirement at all. Always confirm current rules directly with the employer, licensing body or agency.

Color vision is traditionally screened with standardized tests, often plates made of colored dots or arrangements of colored caps that a person puts in order. Screening tests may suggest a color vision difference, and more detailed testing can help describe the type and severity.

Some employers use their own approved tests, and some offer practical or alternative assessments for people who do not pass a first screening. Which tests are accepted, and whether a retest or alternative is allowed, varies by organization and can change.

People with color vision differences have traditionally used everyday strategies such as labeling, organizing items by position, using apps or tools that name colors, and asking coworkers for help. Color-enhancing filter glasses and contact lenses also exist. They do not cure color blindness and do not restore normal color vision, and how much they help, if at all, varies with a person's specific type and severity. They also may not be accepted for meeting a job's testing standard, so ask the testing authority first.

A visit with an eye care professional, such as an optometrist or ophthalmologist, generally starts with questions about your history, your family history and what you notice day to day. They may perform color vision testing and a general eye exam. The right doctor may help you understand your type and severity and what your results could mean.

If a career is on your mind, it can help to bring the exact requirement from the employer or licensing agency. You might ask: Which test does this authority use? Are alternative tests allowed? Would my type and severity matter for this role? Could any glasses or lenses be relevant, or would they not be accepted?

Only a licensed clinician can decide what is appropriate after an evaluation, and color-enhancing glasses or lenses are products to discuss with a provider, including questions about their regulatory status. A doctor may also be able to provide documentation of your results, though the employer or agency decides what it accepts.