Health condition
Colour vision changes
Inherited colour blindness is stable and mostly affects red-green discrimination in men; a change in colour perception in later life is acquired and points to eye or optic nerve disease worth investigating.
Key points
What matters most, at a glance.
The essentials in plain English - symptoms, when to seek help, who to see and what treatment looks like.
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Inherited red-green colour deficiency affects around 1 in 12 men and does not progress
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New washing-out of colours in one eye suggests optic nerve disease - compare eyes by covering each in turn
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Gradual yellowing or browning of the world can be cataract, which surgery reverses
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Some medicines can alter colour vision - report changes rather than assuming
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Specialist: a consultant ophthalmologist for any acquired change in colour perception
Understanding it
About Colour vision changes, and what to do next.
Congenital colour deficiency, overwhelmingly the red-green types carried on the X chromosome, is present from birth, affects both eyes equally and never worsens; it has occupational implications but no medical ones. Acquired change is the meaningful symptom: optic nerve conditions (neuritis, compression, toxic and nutritional damage) drain colour saturation, classically making red look faded in one eye, retinal disease shifts colour along other axes, and dense cataract quietly browns the whole scene until surgery reveals how blue the world was.
The practical self-test is comparing a bright red object between eyes; any one-sided desaturation, particularly with visual dimming or field change, merits prompt assessment. Baseline colour testing also matters for people starting medicines with known optic nerve effects, and any change on treatment should be reported quickly. Most people start with their GP, who can refer to a consultant ophthalmologist. In many parts of the UK, routine NHS referrals for this kind of problem currently take 20-45+ weeks depending on where you live, whereas an initial appointment with a private consultant is typically available within around two weeks.
A quiet reminder
This guide is for information, not medical advice.
Your GP knows your history and can tell you which parts apply to you. If in doubt, see them.
Frequently asked
Common questions about Colour vision changes.
Quick, plain-English answers to what people ask us most.
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What causes changes in colour vision?
Colour vision changes can be inherited (most commonly a form of red-green colour blindness present from birth) or acquired later in life due to conditions affecting the eye or the visual pathways in the brain, including cataracts, macular degeneration, diabetic eye disease, optic nerve conditions, and certain medications. Acquired changes, particularly if new or progressive, are generally more concerning than lifelong colour blindness and warrant investigation. Identifying whether the change is longstanding or new helps guide the appropriate assessment.
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How is inherited colour blindness different from acquired colour vision changes?
Inherited colour blindness, most commonly affecting red-green colour discrimination, is present from birth, typically stable throughout life, and usually more common in men due to its X-linked inheritance pattern. Acquired colour vision changes develop later in life, can affect colour perception in different or more variable ways, and often indicate an underlying eye or, less commonly, neurological condition that needs investigation. This distinction between longstanding, stable colour blindness and a new change is an important part of the clinical assessment.
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Is a new change in colour vision serious?
It can be, since new or progressive colour vision changes, particularly if affecting one eye more than the other, or if you also notice other visual symptoms, can indicate conditions such as cataracts, macular disease, or, less commonly, optic nerve problems that need proper assessment. Some medications can also cause reversible colour vision changes as a side effect. Getting a new colour vision change properly assessed helps identify any underlying cause needing treatment.
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How are colour vision changes assessed?
Assessment typically includes specific colour vision tests (such as using standardised colour plates), a general eye examination, and, depending on findings, further tests such as retinal imaging or assessment of the optic nerve. A detailed history, including onset, whether one or both eyes are affected, and any associated symptoms or relevant medications, helps guide the specific investigation needed. An optometrist or ophthalmologist can determine the most appropriate assessment for your specific situation.
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Can colour vision changes be treated?
This depends entirely on the underlying cause — for example, cataract surgery can often significantly improve colour perception if cataracts are responsible, while inherited colour blindness cannot be corrected, though special glasses or apps can help some people better distinguish certain colours in daily life. Identifying and treating any underlying reversible cause is the most effective approach where one exists. Discussing the specific cause and realistic expectations with your eye specialist helps set appropriate expectations.
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When should I see a specialist?
See an optometrist or ophthalmologist if you notice a new or worsening change in your colour vision, particularly if it affects one eye more than the other or is accompanied by other visual symptoms. NHS ophthalmology referral can take several weeks; a private consultation is typically available within about 2 weeks for earlier assessment.