DEPARTMENT OF OPTOMETRY,

Background Knowledge Visual acuity, the sharpness and clarity of vision, is significantly influenced by environmental lighting conditions. Different light sources, such as ambient light, LED bulbs, fluorescent lights, and incandescent bulbs, can impact visual performance. Optimizing lighting conditions is crucial for enhancing visual clarity and reducing eye strain in workspaces, educational settings, and other environments that demand precise vision. Despite its importance, there is limited research on how various light sources affect visual acuity within a room of fixed dimensions. Purpose This study investigates the effects of different light sources on visual acuity within a controlled room of constant dimensions at the Optometry Clinic, University of Benin. Method A repeated measures experimental design was employed, involving 35 participants with normal or corrected-to-normal vision. Visual acuity was assessed using Snellen charts under different lighting conditions. The room dimensions (length, width, and height) were kept constant, and a light meter was used to measure the illumination levels at the participants' eye level. Visual acuity was recorded in LogMAR values to ensure precision and consistency in data analysis. Statistical tests, including ANOVA and SPSS, were used to compare visual acuity across the different lighting conditions. Conclusion The study concludes that the choice of light source considerably impacts visual acuity within a room of fixed dimensions. These findings provide valuable insights for architectural lighting design, ergonomic practices, and the development of optimal visual environments in educational and professional settings.

orkplaces have a key role in developing eye disorders, due to the danger of accidents. Bottles holding carbonated beverages are potentially dangerous to the eye. Since beverage bottles may burst with regular handling and without provocation, production rules must be put in place to assist in eliminating defective bottles. The study was aimed at investigating the prevalence of ocular morbidities associated with the brewing company workers. This study employed a prospective cross-sectional study design and was carried out in the Coca-Cola bottling company, Benin City. A total of 90 participants consisting of 65 males (72.2%) and 25 females (27.8%) were enrolled in this study. Majority of the participants were between the ages of 24 and 29 years (28.89%) with a mean ± standard deviation of 31.3 ± 7.58 years. Also, 82.2% of the participants had their education at the tertiary level. Data was collected using questionnaires and eye examination. Descriptive statistics such as frequency, percentage, pie charts, mean and standard deviation, and chi-square were used to analyze and summarize the data. Findings from the study revealed that pterygium was the most prevalent ocular morbidity among workers in the brewing industry. Allergic conjunctivitis (11.1%), pinguecula (10.0%), presbyopia (5.6%), cornea opacity (2.2%), foreign body (2.2%), cataract (1.1%) and refractive errors (1.11%), were also prevalent. 62.2% of the participants were aware of activities that pose a risk of injury and packaging was found to be a major risk to eye injury among the participants (20.0%). 61.1% of them owned a personal protective eyewear and xi 47.8% of them who owned a personal protective eyewear owned safety goggles. In conclusion, there was no significant relationship between patients’ ocular assessment and their areas of production (p >0.05). Therefore, it is recommended that workers in the production units receive comprehensive training on the advantages of wearing ocular protective eyewear during their work and the potential consequences of failing to do so.