# Behind the Lens: A Cross-Sectional Study of Convergence Insufficiency in Photographers

## TL;DR

This study finds that photographers experience convergence insufficiency symptoms, with severity linked to age rather than work hours.

## Contribution

The study identifies age as a key factor in convergence insufficiency severity among photographers, suggesting early visual assessments are crucial.

## Key findings

- Older photographers reported more severe CI symptoms despite shorter work hours.
- A moderate positive correlation was found between age and CISS scores.
- Younger participants showed mild to moderate symptoms despite longer work hours.

## Abstract

Introduction: Convergence insufficiency (CI) is a binocular vision disorder affecting near focus, often impacting professionals with high visual demands, such as photographers. Symptoms include eye strain, fatigue, blurred vision, headaches, and difficulty concentrating. This study investigates CI prevalence among photographers using the Convergence Insufficiency Symptom Survey (CISS) questionnaire, aiming to facilitate early detection, clinical evaluation, and intervention strategies to optimize visual performance and well-being.

Materials and methods: This cross-sectional, descriptive study was conducted at the Department of Ophthalmology, GSL Medical College, Rajahmundry, using a survey-based approach with convenience sampling. Participants (aged 18-43) had ≥1 year of photography experience and ≥4 hours of daily work. Exclusions included uncorrected refractive errors, ocular deviations, and neuromuscular disorders. Data analysis involved descriptive statistics, regression, and Pearson correlation. Ethical approval was obtained.

Results: A total of 52 male participants (mean age ± SD: 25.9 ± 6.2 years; range: 18-43 years) were included in the study; no female participants were enrolled. The mean CISS score was 21.6 ± 5.1 (range: 12-33). None of the participants scored within the 0-10 range. Moderate symptoms (scores: 21-30) were reported by 25 participants (48%), mild symptoms (scores: 11-20) by 23 participants (44%), and severe symptoms (scores: >31) by four participants (7.7%). A moderate positive correlation was observed between age and CISS scores (r = 0.51, R² = 0.26, p < 0.001). In contrast, work hours (WH) showed a weak negative correlation (r = -0.26, R² = 0.07, p = 0.05). Analysis of variance (ANOVA) (F = 3.87) suggested a weak overall effect. Severe symptoms were predominantly found in participants older than 36 years, despite them reporting shorter durations of near work.

Conclusion: This study demonstrated a notable association between age, working hours, and the severity of CI symptoms among professional photographers. Younger participants exhibited mild to moderate symptoms despite long WH, whereas older individuals reported more severe symptoms even with less WH. These findings emphasize the importance of early visual assessments and targeted interventions for professional photographers to improve visual health and performance.