Color Blindness: Causes, Signs, Diagnosis, and Color Vision Testing
To accurately determine the nature of color perception and rule out hidden visual system pathologies, a professional color vision test is necessary.
At K31 Clinic, we use advanced diagnostic methods that allow us to quickly assess your color perception and provide detailed recommendations for study, work, or everyday life. If you or your child requires a high-quality color blindness test, our experienced ophthalmologist will perform the procedure in a comfortable environment and thoroughly interpret the results.
specialists
equipment
treatment
Types of color blindness
Red-green deficiencies: protanopia and deuteranopia
When a person completely lacks the cones responsible for perceiving long-wavelength ranges, protanopia develops. With this form of the disorder, red appears dark, almost gray or brown, and green is perceived as light gray. If the receptors sensitive to mid-wavelength ranges fail, deuteranopia is diagnosed. In this condition, green hues merge with blue and red, greatly impeding spatial orientation in areas where these signal colors are used.
Blue-Yellow Color Deficiencies: Tritanopia
A condition in which the retina cannot correctly distinguish blue and yellow colors is called tritanopia. People with this condition see the world primarily in red-green tones, and blue appears green or dark gray.
Hereditary and Acquired Color Blindness
Classic hereditary color blindness is caused by genetic traits and is passed down from generation to generation, remaining unchanged throughout a person's life. Acquired color blindness, on the other hand, develops over the course of a person's life under the influence of external factors or associated pathologies. It can progress and often affects only one eye.
| Symptom | Hereditary | Acquired |
|---|---|---|
| When it appears | Since childhood | Later |
| Cause | Genetic characteristics | Diseases, injuries, medications, etc. |
| How it manifests | Usually stable | May progress. |
| Is a checkup necessary? | Yes | Yes, urgently recommended. |
Why does color vision deficiency occur?
Hereditary Predisposition
Genetic factors play a key role in the development of most cases of color vision defects. The mutation responsible for red-green color blindness is linked to the X chromosome, so inherited color blindness is much more common in males. Women typically carry the defective gene and pass it on to their sons, although they themselves retain a completely normal perception of the entire color palette.
Eye and nervous system diseases, and certain medications
Developing acquired color blindness may indicate serious retinal disorders, such as macular degeneration, or lens clouding due to cataracts. Color perception can also be altered by inflammatory diseases of the optic nerve, traumatic brain injuries, brain tumors, or long-term use of certain potent medications that are toxic to the visual system.
When changes in color perception require urgent evaluation
If you notice that familiar objects have suddenly changed hue, or if one eye begins to see colors differently than the other, don't delay. A timely visit to the K31 Clinic will help identify the underlying cause of these changes, which may be serious neurological or vascular pathologies requiring immediate intervention.
General information
Who especially needs color vision testing?
Children and adolescents
Children often can't independently understand that they see the world differently than their peers, as they are accustomed from childhood to naming colors based on adult cues. The first vision screening in this area should be conducted in preschool to identify any special needs early.
Adults whose work involves color, safety, and accuracy
High-quality color vision testing is critical for future drivers, pilots, train drivers, and navigators, as well as doctors, chemists, designers, and the military. Misreading wire markings or signal lights in these areas can have tragic consequences.
If you notice sudden changes in color perception
We recommend getting tested if you regularly doubt your clothing color choices or have difficulty reading color charts at work.
5 signs that your color vision needs to be checked:
- You regularly confuse red and green shades
- You have difficulty distinguishing colors on transportation diagrams, maps, or product packaging
- You frequently make color mistakes when choosing wardrobe items or interior decorations
- You notice persistent difficulties in your child during educational games and color-based activities
- Any changes in the perception of familiar colors and shades appeared suddenly
Frequently Asked Questions
Is it possible to be unaware of color blindness from childhood?
Is color blindness hereditary?
Can color blindness be completely cured?
When should you urgently consult an ophthalmologist?
References
- MSD Manuals, Russian version — https://www.msdmanuals.com/ru/home
- Clinical Guidelines of the Ministry of Health of the Russian Federation — https://cr.minzdrav.gov.ru/
- Russian Medical Journal, Ophthalmology Section — https://www.rmj.ru/articles/oftalmologiya/
- Ophthalmology Bulletin / Mediasphera — https://www.mediasphera.ru/journal/vestnik-oftalmologii
- TakZdorovo - https://www.takzdorovo.ru/
- EyePress - https://eyepress.ru/
Our doctors
This award is given to clinics with the highest ratings according to user ratings, a large number of requests from this site, and in the absence of critical violations.
This award is given to clinics with the highest ratings according to user ratings. It means that the place is known, loved, and definitely worth visiting.
The ProDoctors portal collected 500 thousand reviews, compiled a rating of doctors based on them and awarded the best. We are proud that our doctors are among those awarded.
Make an appointment at a convenient time on the nearest date
Price
Other services
Appointment to the doctor
Reviews
Our clinics
Application “Personal Account K+31”
What is color blindness and how is it different from other color vision deficiencies?
In ophthalmology, a condition in which the retina loses the ability to correctly recognize certain colors is called color blindness. Many people mistakenly believe that this condition turns everything around them into a black-and-white movie, but in fact, absolute color blindness is extremely rare. Most often, it involves a partial reduction in the perception of specific spectra, which a person may not even notice for a long time in everyday life. When such a color vision deficiency is discovered accidentally, it can come as a surprise to the patient.
Color blindness, color blindness, and color anomaly: what's the difference?
The correct perception of the palette is based on special light-sensitive receptors in the retina, called cones. Normally, a person has three types of these receptors, each responsible for a different primary color: red, green, or blue. When all three types function perfectly, vision is called trichromatic. If the activity of one type of receptor is reduced, a color vision anomaly occurs, which doctors call color anomaly or incomplete trichromacy. Complete color blindness means an absolute inability to distinguish colors, where a person sees the world exclusively in shades of gray, while classic color blindness encompasses any type of loss or weakening of perception of individual parts of the spectrum.
How a person with color blindness sees colors
Contrary to popular belief, most people with this condition see objects around them perfectly; some shades simply merge into a single tone. The way colorblind people see the world around them directly depends on the degree of involvement of specific receptors.