What it is
Color vision depends on the eye, the optic nerve and the parts of the brain that process what we see. Most inherited color blindness is present from birth and falls into protan, deutan or tritan types. Acquired color vision changes begin later in life and can have many possible causes.
Certain medications have been associated with changes in color perception in some people. A person might notice colors looking faded, shifted or tinted, or find it harder to tell certain shades apart. Whether this happens depends on the medication, the person and other health factors, and many people never notice any change.
Acquired changes can look different from inherited types. They may affect one eye more than the other, may shift over time, and may involve blue-yellow or red-green confusion. Because many things besides medication can cause similar changes, a symptom alone does not show what the cause is.
How it’s traditionally been approached
Traditionally, color vision changes are brought up in a medical or eye care setting. A person who notices something different, or a clinician who knows a medication may influence vision, may suggest a closer look at color perception.
Eye care professionals have long used color vision tests, such as plate-based screening or arrangement tests, to see how someone distinguishes colors. These can help describe the pattern of difficulty. They are tools for gathering information, not a verdict on the cause by themselves.
Prescribing clinicians and pharmacists often review a person's full medication list when vision changes appear. Medication labels and package inserts may list possible vision-related effects. Medications should not be stopped or changed on your own. Any decision about a prescription belongs to the licensed clinician who prescribed it.
How the right doctor may help
The right provider, such as an eye doctor experienced in genetic and acquired color vision evaluation, may help sort out whether a change in color perception looks inherited, acquired, or something else. A visit generally starts with a conversation about your history, when you first noticed changes and what you have noticed.
Expect questions about everything you take, including prescriptions, over-the-counter products and supplements. Bringing an up-to-date list, or the bottles themselves, can be helpful. The provider may do an eye exam and color vision testing, and may coordinate with your prescriber or other clinicians if appropriate.
Questions you might ask include: Could any of my medications be related to what I notice? Does this look inherited or acquired? Should one eye be checked separately? How often should my color vision be rechecked? What changes should prompt me to call you sooner? A provider may also discuss everyday strategies for tasks involving color.
The whole-person view
Body, mind and stress affect each other. Changes in how you see color can feel unsettling, especially if you also manage a health condition that needs medication. Worry, poor sleep and tension can make any symptom feel more noticeable, and a whole-person view looks at all of these together.
Some people find body-based support, such as the approaches offered through Somatic Experiences, helpful for managing stress. Others value talk therapy, such as through Therapists.plus, when health worries feel heavy. These are optional supports that sit alongside, not in place of, care from your licensed providers.
Keep in mind
- Never stop, skip or change a medication without talking to the clinician who prescribed it, since doing so can carry real risks.
- Color-enhancing filter glasses and contact lenses do not cure color blindness and do not restore normal color vision. Their usefulness varies by the person's type (protan, deutan or tritan) and severity, and a provider can discuss whether they are appropriate.
- A sudden change in vision, vision loss, eye pain or other new symptoms should be evaluated promptly by a licensed professional. For emergencies call 911; in a crisis call or text 988.
- Workplace and licensing color vision standards vary by employer and authority and change over time, so confirm current requirements with the specific employer, licensing body or agency.
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Frequently asked questions
What medications affect color vision?
Several types of medications have been associated with color perception changes in some people, but which ones and how likely it is varies widely. Your prescriber, pharmacist or the medication's labeling can tell you about possible vision-related effects for a specific product. Do not stop a medication on your own.
Can medication cause color blindness?
Some medications may cause acquired color vision changes in certain people, but this is different from inherited color blindness. The changes may or may not be temporary, depending on the person and the situation. A licensed eye doctor can evaluate what is going on.
How do I know if my color vision change is from a medication?
You cannot tell from symptoms alone, because other conditions can cause similar changes. An eye doctor can review your history, medication list and test results to help understand possible causes. Noting when the change began compared with any new medication can be useful information to share.
Are color vision changes from medication reversible?
It depends on the person, the medication and the underlying circumstances, so no one can promise an outcome. Some people notice changes ease over time, while others do not. Ask your prescriber and eye doctor what to expect in your situation.
Should I stop taking my medication if colors look different?
No, do not stop or change a medication without speaking to the clinician who prescribed it. Contact your prescriber or eye doctor promptly to describe what you notice, and they can decide what is appropriate. If symptoms are sudden or severe, seek urgent care or call 911 in an emergency.
Can color blind glasses help with medication-related color changes?
Color blind glasses, meaning color-enhancing filter glasses, do not cure color blindness or restore normal color vision. How much they help, if at all, varies by the type and severity of the color vision difference, and acquired changes may not respond the same way as inherited ones. Ask a licensed eye care provider whether they are appropriate for you.
Educational resource. Colorblind Glasses shares general information and connects people with independent doctors. It is not medical advice, diagnosis or treatment. Talk with a licensed professional about your health.