Background: Color blindness, or Color Vision Deficiency (CVD), is a common yet underrecognized visual impairment that impacts individuals’ ability to perceive certain colors accurately. While most cases are inherited and permanent, lack of awareness and screening-especially in resource-limited settings like rural India-often delays detection. This unawareness can affect academic performance, career choices and everyday activities that rely on color discrimination. Materials and Methods: A descriptive cross-sectional study was conducted between January and March 2025 to assess public knowledge and awareness of color blindness among 400 adult residents of Himachal Pradesh, India. A structured, self-administered questionnaire-developed in Hindi and English and validated through expert input-was distributed online using purposive and convenience sampling. The questionnaire covered socio-demographic details, awareness of causes, symptoms, diagnosis and functional challenges of CVD. Data were analyzed using SPSS Version 26.0, with descriptive statistics and chi-square tests applied to determine associations between demographic variables and awareness levels (p<0.05 considered significant). Results: The study achieved gender balance (50.8% male, 49.3% female) with a majority aged 26-45 years and 59% residing in rural areas. Overall, 81.5% of participants correctly identified color blindness and 70.8% recognized its genetic basis. Awareness of diagnostic tools like the Ishihara test (72.0%) and functional challenges (62.3%) was moderate. Only 63.5% knew red-green deficiency was the most common type. Knowledge scores revealed that 39.5% had “Very Good” knowledge (>80% correct answers), 38% had “Good” knowledge, while 22.6% demonstrated only “Fair” or “Poor” understanding-predominantly among rural and less-educated individuals. Conclusion: While general awareness of color blindness in Himachal Pradesh is promising, significant gaps remain in recognizing symptoms, functional limitations and the broader implications of CVD. There is an urgent need for culturally relevant public health initiatives, school-based vision screening programs and targeted educational outreach, especially in rural and underserved communities, to ensure early identification and informed decision-making.
Color blindness, or color vision deficiency (CVD), is a visual impairment that affects an individual's ability to perceive and differentiate between certain colors. Most commonly inherited and often lifelong, color blindness is typically caused by abnormalities in the cone cells of the retina, leading to difficulty distinguishing between red and green, or less commonly, blue and yellow hues. While it affects an estimated 1 in 12 men and 1 in 200 women globally, the condition frequently goes unnoticed, especially in communities where routine vision screening is not standard practice [1-4].
Despite its prevalence and potential impact on daily functioning, awareness about color blindness remains surprisingly low. Individuals with CVD may face challenges in educational settings, professional environments and everyday tasks such as interpreting color-coded signals, reading maps, or selecting ripe fruits. These challenges are compounded by the fact that many individuals are unaware of their condition until later in life, if at all. In the absence of widespread screening and public education, misconceptions-such as the belief that color blindness implies seeing the world in black and white-persist, further limiting social understanding and accommodation [5-7].
In countries like India, where vision care is often focused on more overt or debilitating ocular conditions, color blindness is seldom prioritized in public health dialogues. Lack of standardized screening in schools, limited access to optometric services in rural areas and minimal public discourse contribute to a gap in awareness. This unawareness can have far-reaching consequences, especially when undetected CVD influences career choices in fields where color discrimination is critical, such as aviation, electrical work, graphic design and healthcare [8-10].
Given the subtle yet significant implications of color blindness on quality of life and professional opportunities, it is essential to evaluate public knowledge and perceptions surrounding this condition. This study, titled "Seeing the Colors of Awareness," aims to assess the level of awareness, understanding and societal attitudes toward color blindness among the general population of Himachal Pradesh, India. By identifying knowledge gaps across socio-demographic groups, the study seeks to inform future screening protocols, educational strategies and policy interventions to foster a more inclusive and informed society.
Research Design
This study employed a descriptive cross-sectional design to assess public knowledge, awareness and perceptions related to color blindness (color vision deficiency) among residents of Himachal Pradesh, India. The goal was to evaluate the general population’s understanding of the condition’s causes, symptoms, impact and social relevance in daily life.
Study Area and Population
The research was conducted across multiple districts of Himachal Pradesh-a northern Indian state with a mix of urban centers and rural settlements. The target population included adults aged 18 years and above, representing diverse educational, occupational and socio-economic backgrounds. A concerted effort was made to ensure representation from both rural and urban populations, considering disparities in access to vision care and awareness resources.
Sample Size and Sampling Technique
A sample size of 400 participants was calculated based on a 95% confidence interval, an estimated 50% prevalence of basic awareness regarding color blindness and a 5% margin of error. To account for incomplete responses, a 10% buffer was added. Convenience and purposive sampling techniques were used to reach participants from varied demographic backgrounds. The online questionnaire was distributed via Google Forms and circulated through social media platforms such as WhatsApp, Facebook and local educational or occupational groups.
Inclusion and Exclusion Criteria
Inclusion Criteria
Participants who voluntarily consented to participate
Exclusion Criteria
Incomplete or duplicate questionnaire submissions
Data Collection Instrument
A structured, self-administered questionnaire was developed in consultation with ophthalmologists, optometrists and health educators. The tool was pre-tested on a small pilot group to ensure clarity and reliability. It was made available in both Hindi and English to maximize accessibility.
The questionnaire consisted of four sections:
Scoring and Knowledge Classification
Each correct response in the knowledge section was assigned one point. Total scores were categorized into four levels:
Poor Knowledge: <40%
This scoring system helped identify participants with limited understanding who may benefit from targeted educational outreach.
Data Collection Procedure
The survey was conducted over a three-month period (January to March 2025). The questionnaire link was disseminated through educational institutions, local community groups and social media channels. Participants were informed about the voluntary nature of the study, assured of confidentiality and asked to provide informed consent prior to submission.
Data Analysis
All responses were reviewed for completeness and accuracy. Data were compiled using Microsoft Excel and analyzed using SPSS (Version 26.0). Descriptive statistics (frequencies and percentages) were used to summarize the socio-demographic characteristics and awareness levels.
Ethical Considerations
The study protocol was reviewed and approved by the institutional ethics committee. Participants were provided with detailed information regarding the objectives, voluntary participation, data confidentiality and the right to withdraw at any stage without consequence. All responses were anonymized prior to analysis to maintain participant privacy.
The study included a total of 400 participants, with a nearly equal gender distribution-50.8% male and 49.3% female. The most represented age group was 26-35 years (36.0%), followed by 36-45 years (28.3%), indicating a strong presence of working-age adults likely engaged in visually demanding tasks. Educational backgrounds varied, with a combined 68.3% having completed at least secondary education or higher (34.3% secondary, 34.0% undergraduate), though 19.9% had only primary or no formal education. Homemakers (26.5%) and office workers (23.5%) formed the largest occupational groups, with notable representation from teachers (17.3%) and healthcare professionals (10.3%). Importantly, 59.0% of respondents resided in rural areas, reflecting the need to assess awareness in communities with potentially limited access to vision screening and eye care services (Table 1).
Table 1: Socio-Demographic Characteristics of Participants
Variable | Category | Frequency (n) | Percentage (%) |
Age Group (Years) | 18–25 | 87 | 21.8 |
26–35 | 144 | 36.0 | |
36–45 | 113 | 28.3 | |
46 and above | 56 | 14.0 | |
Gender | Male | 203 | 50.8 |
Female | 197 | 49.3 | |
Education Level | No formal education | 18 | 4.5 |
Primary school | 62 | 15.5 | |
Secondary school | 137 | 34.3 | |
Undergraduate degree | 136 | 34.0 | |
Postgraduate degree | 47 | 11.8 | |
Occupation | Homemaker | 106 | 26.5 |
Office Worker | 94 | 23.5 | |
Teacher | 69 | 17.3 | |
Healthcare Professional | 41 | 10.3 | |
Student | 52 | 13.0 | |
Other | 38 | 9.5 | |
Residential Setting | Urban | 164 | 41.0 |
Rural | 236 | 59.0 |
Awareness regarding color blindness among participants was moderately high, with 81.5% correctly identifying it as a condition involving difficulty distinguishing certain colors. A majority (70.8%) understood its genetic origin and 67.0% recognized the retina (cones) as the affected part of the eye. Encouragingly, 87.8% knew that color blindness cannot be cured and 79.8% agreed on the importance of consulting an eye specialist if color confusion is suspected. Specific knowledge of symptoms and impact showed variability-while 64.3% identified red-green confusion as a sign, only 63.5% correctly named red-green deficiency as the most common type. Awareness of diagnostic methods was strong, with 72.0% familiar with the Ishihara test and 76.8% aware of real-life indicators like traffic light confusion. However, only 60.3% knew that vitamin A supports eye health and 62.3% acknowledged the daily challenges posed by the condition. Preventive understanding was better: 81.8% recognized the usefulness of color-coded tools in daily life and 76.5% correctly avoided the assumption that color blindness affects all vision. Overall, the results highlight broad general awareness but also reveal gaps in symptom recognition and nuanced understanding of the condition (Table 2).
Table 2: Awareness and Knowledge of Color Blindness Among the General Population
No. | Question | Options | Correct Responses (n) | Percentage (%) |
1 | What is color blindness? | a) Ear condition, b) Difficulty distinguishing certain colors, c) Throat issue, d) Skin disorder | 326 | 81.5 |
2 | What is the most common cause of color blindness? | a) Poor diet, b) Loud noise, c) Genetic inheritance, d) Dry air | 283 | 70.8 |
3 | What part of the eye is affected by color blindness? | a) Lens, b) Cornea, c) Retina (cones), d) Optic nerve | 268 | 67.0 |
4 | Can color blindness be cured? | a) Yes, b) No, c) Only in children, d) Only with surgery | 351 | 87.8 |
5 | Which nutrient supports overall eye health? | a) Vitamin B12, b) Vitamin A, c) Vitamin K, d) Iron | 241 | 60.3 |
6 | What should someone do if they suspect color blindness? | a) Ignore it, b) See an eye specialist, c) Change diet, d) Wait a month | 319 | 79.8 |
7 | What is a common sign of color blindness? | a) Hearing loss, b) Sore throat, c) Confusing red and green, d) Fever | 257 | 64.3 |
8 | Which situation might indicate a need for color vision testing? | a) Mild dryness, b) Difficulty reading traffic lights, c) Occasional blur, d) Tiredness | 307 | 76.8 |
9 | Is color blindness more common in men than women? | a) Yes, b) No, c) Only in the elderly, d) Only from injury | 274 | 68.5 |
10 | What test is commonly used to diagnose color blindness? | a) Hearing test, b) Ishihara test, c) Blood test, d) Sugar syrup | 288 | 72.0 |
11 | What is a potential challenge of color blindness? | a) Difficulty identifying colors in daily tasks, b) No challenge, c) Hair loss, d) Joint pain | 249 | 62.3 |
12 | Can color blindness affect only one eye? | a) Yes, b) No, c) Only if inherited, d) Only if severe | 314 | 78.5 |
13 | How does color blindness typically affect vision? | a) Blurs vision, b) Reduces color perception, c) Improves focus, d) Causes ear pain | 271 | 67.8 |
14 | What is the most common type of color blindness? | a) Blue-yellow, b) Red-green, c) Total color loss, d) Night vision | 254 | 63.5 |
15 | Can color blindness develop later in life? | a) Yes, b) No, c) Only with surgery, d) Only in youth | 266 | 66.5 |
16 | What can help manage color blindness in daily life? | a) Rubbing eyes, b) Avoiding screens, c) Using color-coded tools, d) Dim lights | 327 | 81.8 |
17 | What should you avoid assuming about color blindness? | a) Drinking water, b) That it affects all vision, c) Resting, d) Bright lights | 306 | 76.5 |
18 | Which of these is NOT a symptom of color blindness? | a) Mixing up colors, b) Difficulty with color tasks, c) Normal vision, d) Sore throat | 244 | 61.0 |
19 | What is the first step if you notice color confusion? | a) Increase screen time, b) Apply heat, c) See an eye doctor, d) Ignore it | 262 | 65.5 |
20 | What type of doctor diagnoses color blindness? | a) Cardiologist, b) Neurologist, c) Ophthalmologist, d) Dentist | 346 | 86.5 |
The distribution of knowledge scores reflected a largely informed population, with 39.5% of participants falling into the “Very Good” category (>80% correct responses) and 38.0% classified as having “Good” knowledge (60-79%). However, 15.8% scored in the “Fair” range (41-59%) and 6.8% demonstrated “Poor” knowledge (<40%), pointing to a notable minority with limited awareness. These lower scores were disproportionately observed among individuals with no formal education and those residing in rural settings. The findings underscore the importance of continued public education efforts focused on color vision deficiencies-particularly targeting under-informed groups through accessible, visual and community-centered learning platforms (Table 3).
Table 3: Knowledge Score Classification
Knowledge Category | Score Range | Frequency (n) | Percentage (%) |
Very Good | ≥80% | 158 | 39.5 |
Good | 60%–79% | 152 | 38.0 |
Fair | 41%–59% | 63 | 15.8 |
Poor | <40% | 27 | 6.8 |
This study, titled “Seeing the Colors of Awareness”, offers a comprehensive assessment of public knowledge and awareness regarding color blindness (color vision deficiency, or CVD) among the general population of Himachal Pradesh, India. The findings reveal a population that is moderately informed about the basics of color blindness, while simultaneously highlighting significant knowledge gaps-especially in understanding its symptoms, real-life implications and the importance of early detection. These results are highly relevant in the context of public health, education and career planning, where color vision plays an unspoken yet pivotal role.
The demographic breakdown shows a well-distributed sample across age, gender, education level and occupation, lending credibility to the generalizability of findings. The majority of respondents (36%) were in the 26-35 age group, an age range typically involved in careers requiring visual acuity, thus making awareness of color blindness highly pertinent. The near-equal gender distribution (50.8% male, 49.3% female) supports balanced representation and allows for meaningful comparisons across sexes-important given that color blindness is genetically more prevalent in men.
Notably, 59% of respondents hailed from rural areas-an important demographic often overlooked in eye health research. Rural participants often face systemic barriers to healthcare access, lower levels of health literacy and fewer opportunities for early screening. These findings suggest that awareness campaigns must be customized to address the needs of this population segment, using accessible formats and regional languages.
Educational attainment was varied: while over two-thirds of participants had completed secondary school or higher, nearly 20% had only primary education or none at all. This highlights the necessity of simplifying medical concepts in awareness campaigns, especially for populations that may not easily comprehend technical terms related to vision science or ophthalmology.
On the positive side, a large majority of respondents (81.5%) were able to correctly define color blindness and 70.8% recognized it as a genetically inherited condition-both indicators of solid baseline awareness. Furthermore, 87.8% were aware that color blindness is not curable, demonstrating correct understanding of the condition’s permanence. The wide recognition of ophthalmologists as the appropriate specialists (86.5%) further reflects favorable healthcare-seeking attitudes.
However, awareness was more fragmented when it came to the functional aspects and lived experiences of individuals with color blindness. For instance, only 64.3% recognized red-green confusion as a key symptom and just 63.5% identified red-green deficiency as the most common type. This signals a limited understanding of how CVD presents in real-world settings, particularly in regions where formal screening is rare and misconceptions abound.
Moreover, while a majority understood the importance of visiting an eye specialist (79.8%), only 60.3% correctly linked vitamin A to eye health and even fewer (62.3%) were aware of the practical challenges posed by CVD in daily tasks. This limited functional knowledge could lead individuals to ignore or downplay early symptoms, delaying diagnosis and limiting career guidance for young adults.
Encouragingly, preventive and coping strategies were better understood. A substantial 81.8% recognized the benefit of color-coded tools in managing everyday tasks and 76.5% avoided the common misconception that color blindness affects all aspects of vision. These results offer a hopeful foundation upon which to build more specialized educational content tailored to real-life application.
Knowledge classification results show that while a significant proportion (39.5%) of participants fell into the “Very Good” category and another 38% were in the “Good” range, a concerning 22.6% exhibited only “Fair” or “Poor” knowledge. These lower scores were disproportionately associated with rural residence and lower educational attainment. This echoes national and global concerns around healthcare access inequity, especially in vision-related conditions that are often perceived as non-urgent or non-disabling.
It is particularly critical to address these gaps given that color blindness can have serious implications for employment eligibility in sectors such as aviation, railways, defense, design, electrical work and healthcare. Without adequate knowledge and early screening, individuals may unknowingly enter fields that later restrict them based on color vision requirements, leading to career frustration or disqualification.
Additionally, the lack of awareness may limit educators' ability to identify struggling students whose learning difficulties stem not from cognitive issues but from unrecognized visual limitations. Teachers, especially in rural areas, should be educated on how color blindness might manifest in classroom behaviors-such as incorrect coloring, confusion during map-reading, or difficulty with charts-so that referrals can be made at an early stage.
Public Health and Policy Implications
The study’s findings carry meaningful implications for public health policy, education planning and community engagement strategies. First and foremost, color vision testing must be integrated into school-level health screenings, especially for boys, who are statistically more likely to be affected. Early identification can empower children, parents and teachers to adapt learning materials and make informed career choices [9,10].
Second, community-level awareness campaigns should go beyond clinical definitions and highlight how color blindness impacts everyday functioning-through storytelling, illustrations and interactive tools. Public service announcements, animated videos in local languages and visual simulations of how color-blind individuals perceive common scenes (e.g., traffic signals or classroom materials) can be highly effective [10,11].
Third, training for healthcare providers, including primary health workers and optometrists, should include modules on color vision deficiency. This will ensure that frontline professionals are equipped to counsel patients and suggest practical coping strategies, such as the use of color-filtering lenses, assistive mobile apps and customized digital tools [11,12].
Finally, inclusive policy reforms should mandate the disclosure of color vision requirements in job advertisements and entrance examinations. Where possible, alternative evaluation methods or accommodations should be developed so that individuals with CVD are not unfairly excluded from employment opportunities that do not critically depend on color differentiation.
This study underscores a moderately high level of public awareness regarding color blindness in Himachal Pradesh, yet it reveals critical knowledge gaps-particularly concerning symptoms, real-life challenges and the need for early screening. While most participants understood the genetic basis and incurable nature of the condition, awareness about its impact on daily tasks and career choices remains limited, especially among rural and less-educated groups. These findings highlight the need for targeted education, school-based screening programs and inclusive health communication strategies to promote early detection, support affected individuals and foster a more informed and accommodating society.
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