Glaucoma stands as a silent but formidable threat to vision worldwide, representing a significant public health challenge. Often called the "silent thief of sight," glaucoma is a group of progressive eye conditions characterized by damage to the optic nerve, resulting in irreversible vision loss if left untreated. With its insidious onset, individuals affected by glaucoma may remain unaware of its presence until advanced stages, making early detection and awareness critical for preventing vision impairment and blindness [1-4].

The global burden of glaucoma is substantial and is expected to escalate with the aging population. By 2040, it is estimated that over 110 million people worldwide will be living with glaucoma, emphasizing the urgent need to assess awareness and knowledge about this condition, especially among the general population [5-6].

Glaucoma often manifests without noticeable symptoms in its early stages. However, as it progresses, individuals may experience peripheral vision loss, tunnel vision, and, ultimately, complete blindness if untreated. These irreversible consequences underscore the importance of early detection and timely intervention through regular eye examinations [7,8].

District Kangra, situated amidst the scenic beauty of Himachal Pradesh, India, is home to a diverse population. Access to healthcare services has improved in recent years, yet understanding the levels of awareness and knowledge about glaucoma, its risk factors, and the significance of routine eye exams remains essential. This study aims to unveil the silent threat of glaucoma in District Kangra.

By assessing the awareness and understanding of glaucoma within the community, including knowledge of its risk factors and the role of regular eye exams in early detection, we seek to identify knowledge gaps and areas where public health interventions can be directed. Raising awareness about glaucoma and its prevention through education about risk factors and the importance of timely eye examinations is imperative to protect the vision and overall quality of life of the residents.

In this context, we aim to contribute to the growing body of knowledge   on    eye    health   and    advocate   for  initiatives that empower individuals to take proactive measures to preserve their sight.           

Objectives of the Study

The objective of this study is to gauge the levels of awareness and knowledge about glaucoma, its risk factors, and the importance of regular eye exams for early detection among the general population of District Kangra, Himachal Pradesh.

• Research Approach: Descriptive

• Research Design: Cross-sectional survey design

• Study Area:  District Kangra, Himachal Pradesh

• Study Duration: Between April 2023 to July 2023

• Study Population: The study's target population encompassed all adults aged 18 and above who had been residents of District Kangra for a minimum of 12 months

• Sample Size: A robust sample size of 400 adults was determined using a 95% confidence level, an estimated knowledge level of 50% regarding glaucoma and its risk factors , a precise 5% absolute error margin, and a conservative 5% non-response rate

• Study Tool: A google form questionnaire consisting of questions regarding socio-demography and knowledge regarding glaucoma and its risk factors was created. The questionnaire was initially pre-tested on a small number of participants to identify any difficulty in understanding by the respondents

Description of Tool

• Demographic data survey instrument: The demographic form elicited information on participants’ background: age, marital status, religion, employment, education and many more

• Questionnaire: The questionnaire contains 20 structured knowledge related questions regarding glaucoma and its risk factors . One mark was given for each correct answer and zero for incorrect answer. The maximum score was 20 and minimum score was zero. Scoring was done on the basis of marks as >80%(16-20)=very good,60-79%(12-15) =Good,41-59% ( 8-11)=Fair,<40% (< 8)=poor

• Validity of Tool: By the experts in this field

• Data Collection: Data was collected under the guidance of supervisors. The google form questionnaire was circulated among the residents of District Kangra, Himachal Pradesh for responses using online modes like e-mail and social media platforms like Whatsapp groups, Facebook, Instagram and Linkedin till the 400 responses were collected

• Data Analysis: Data was collected and entered in Microsoft excel spread sheet, cleaned for errors and analyzed with Epi Info V7 Software with appropriate statistical test in terms of frequencies and percentage

• Ethical Considerations- Participants confidentiality and anonymity was maintained

The primary objective of this study was to gauge the understanding of glaucoma and its risk factors among the general population of District Kangra. A total of 400 participants took part in the study, with 269 (67.25%) residing in urban areas and 131 (32.75%) in rural areas (Table 1).

Table 1: Knowledge Regarding Glaucoma and Its Risk Factors among Study Participants

In the present study 20.75% (83)  participants had very good knowledge (16-20 marks) towards glaucoma and its risk factors, 23.75% (95) had good knowledge (12-15 marks), 33.25% (133) had fair knowledge  (8-11 marks) and 22.25% (89) having poor knowledge  (<8 marks) (Figure 1).

Figure 1: Knowledge Scores towards Glaucoma and Its Risk Factors among Study Participants

Glaucoma is a significant global public health concern due to its potential to cause irreversible vision loss. Early detection and awareness are crucial in managing this "silent thief of sight." This discussion interprets the study's findings and contextualizes them within existing research, highlighting knowledge gaps and potential areas for improvement.

The study revealed varying levels of knowledge among the participants regarding glaucoma and its risk factors. While some respondents demonstrated a reasonable understanding, there were notable gaps in knowledge, particularly in recognizing risk factors and prevention methods.

Only 43% of participants correctly understood what glaucoma is and how it affects the eyes. This suggests a need for increased awareness about the disease's nature and its potential consequences. Approximately 41% of participants could name common symptoms associated with glaucoma. Recognizing these symptoms, such as increased intraocular pressure, is vital for individuals to seek prompt medical attention [1-2].

A quarter of participants (25.5%) were aware that there are different types of glaucoma with varying symptoms. Understanding these distinctions can aid in early diagnosis and appropriate treatment. About 40.5% of participants recognized that certain age groups are more susceptible to developing glaucoma. This awareness underscores the importance of regular eye check-ups, especially for older individuals.While 35.75% were aware of known risk factors for glaucoma, there is room for improvement in educating the public about factors like family history, age, and ethnicity [3-5].

Approximately 27.75% understood that a family history of glaucoma influences an individual's risk. This knowledge can encourage those with a family history to be vigilant about eye health. A significant proportion (38%) believed that glaucoma could be prevented through lifestyle changes or dietary modifications. Public education should emphasize that glaucoma cannot be prevented but can be managed effectively.Only 30.25% understood the concept of intraocular pressure (IOP) and its relevance to glaucoma. Knowledge about IOP is essential as elevated pressure is a risk factor [6-8].

Just 19% believed that glaucoma could be diagnosed through self-assessment or home testing. This indicates a need for education on the importance of regular eye exams for early detection. While 31% were aware of non-surgical treatment options for glaucoma management, more detailed information about these options is necessary to guide patients and their choices. About 33% understood the primary goals of glaucoma treatment, which include lowering IOP and preserving vision. Enhancing knowledge in this area can help individuals engage in their treatment plans effectivel [9-10].

Recognizing the role of regular eye examinations in early glaucoma detection was demonstrated by 35.25% of participants. This underscores the importance of routine eye check-ups for all, especially those at risk.While 38.75% knew about advanced diagnostic tests for glaucoma, detailed awareness of these tests can empower individuals to seek comprehensive eye exams. Impressively, 42.75% understood that glaucoma can lead to blindness if left untreated. This awareness is essential in motivating individuals to adhere to treatment regimens [11-12].

Approximately 25.25% were aware of support groups or resources for individuals with glaucoma in District Kangra. Expanding access to such resources and raising awareness about their existence is vital. Only 19% were aware of the typical treatment approach for glaucoma patients, indicating the need for more comprehensive patient education. About 33.75% recognized that vision lost due to glaucoma cannot be completely restored. This realistic understanding is essential for managing patient expectations [13-15].

Knowledge of potential side effects or risks associated with glaucoma treatments was shown by 28.25% of participants. Detailed information about treatment risks is crucial for informed decision-making. Only 8.5% believed that glaucoma is a common eye condition in District Kangra, Himachal Pradesh. This perception might underestimate the actual prevalence of the disease and highlights the need for awareness campaigns. An encouraging 64% of participants expressed opinions on improving awareness about glaucoma and the importance of regular eye exams in the community. These insights can guide targeted awareness campaigns tailored to local needs [16-18].

The findings align with previous research on glaucoma awareness, emphasizing the need for comprehensive education campaigns and enhanced public awareness.^12-18 While knowledge levels vary, this study provides a valuable assessment of the current understanding of glaucoma and its risk factors in District Kangra.

This study assessed the awareness and knowledge levels of glaucoma and its risk factors among the general population of District Kangra. While some participants demonstrated a reasonable understanding, there are substantial knowledge gaps, particularly regarding risk factors, prevention, and the role of regular eye examinations.

Enhancing public education about glaucoma, early detection, and available treatments is imperative to ensure that individuals seek timely eye care and preserve their vision. By addressing these knowledge gaps, we can contribute to reducing the burden of glaucoma-related vision impairment in the community, ultimately improving the overall quality of life for its residents.

1. Quigley et al. “The number of people with glaucoma worldwide in 2010 and 2020.” British Journal of Ophthalmology, vol. 90, no. 3, 2006, pp. 262–67.

2. Weinreb et al. “The pathophysiology and treatment of glaucoma: A review.” JAMA, vol. 311, no. 18, 2014, pp. 1901–11.

3. Tham, Y.C.   “Global prevalence of glaucoma and projections of glaucoma burden through 2040: A systematic review and meta-analysis.” Ophthalmology, vol. 121, no. 11, 2014, pp. 2081–90.

4. Quigley, Harry A. “Glaucoma.” The Lancet, vol. 377, no. 9774, 2011, pp. 1367–77.

5. Burr, Jennifer et al. “Medical versus surgical interventions for open-angle glaucoma.” Cochrane Database of Systematic Reviews, no. 2, 2005, CD004399.

6. Leske, M. Cristina et al. “Factors for glaucoma progression and the effect of treatment: The Early Manifest Glaucoma Trial.” Archives of Ophthalmology, vol. 125, no. 3, 2007, pp. 338–45.

7. Thapa, Shankar S. et al. “A population-based survey of the prevalence and types of glaucoma in Nepal: The Bhaktapur Glaucoma Study.” Ophthalmology, vol. 118, no. 4, 2011, pp. 600–05.

8. Mikelberg et al.“The rate of progression of scotomas in glaucoma.” American Journal of Ophthalmology, vol. 111, no. 4, 1991, pp. 491–93.

9. Kass, Michael A. et al. “The Ocular Hypertension Treatment Study: A randomized trial determines that topical ocular hypotensive medication delays or prevents the onset of primary open-angle glaucoma.” Archives of Ophthalmology, vol. 120, no. 6, 2002, pp. 701–13.

10. Quigley, Harry A. “Number of people with glaucoma worldwide.” British Journal of Ophthalmology, vol. 70, no. 2, 1986, pp. 82–87.

11. Friedman, David S. et al. “An evidence-based assessment of risk factors for the progression of ocular hypertension and glaucoma.” American Journal of Ophthalmology, vol. 138, no. 3, 2004, pp. S19–S31.

12. Tielsch, James M. et al. “Racial variations in the prevalence of primary open-angle glaucoma: The Baltimore Eye Survey.” JAMA, vol. 266, no. 3, 1991, pp. 369–74.

13. Coleman, Anne L. and S. Miglior. “Risk factors for glaucoma onset and progression.” Survey of Ophthalmology, vol. 53, suppl. 1, 2008, pp. S3–S10.

14. Leske, M. Cristina et al. “Factors for progression and glaucoma treatment: The Early Manifest Glaucoma Trial.” Current Opinion in Ophthalmology, vol. 14, no. 2, 2003, pp. 102–06.

15. Sommer, Alfred et al. “Racial differences in the cause-specific prevalence of blindness in East Baltimore.” New England Journal of Medicine, vol. 325, no. 20, 1991, pp. 1412–17.

16. Musch, Donald C. et al. “Ocular Hypertension Treatment Study.” Ophthalmology, vol. 121, no. 2, 2014, pp. 456–65.

17. Chen, Paul P. “Risk and risk factors for blindness from glaucoma.” Current Opinion in Ophthalmology, vol. 25, no. 2, 2014, pp. 144–49.

18. Wilson, Roy, Thomas M. Richardson, and Edith Hertzmark. “Race and glaucoma: Comparison of self-reported and ophthalmologist-diagnosed cases in a nationwide survey.” Journal of the National Medical Association, vol. 77, no. 9, 1985, pp. 711–14.