Background: Glaucoma leads to irreversible vision loss which involves continuous and progressive optic nerve changes and can occur with or without elevated intraocular pressure (IOP). The projection of glaucoma since 2010 was 60 million which reaches 80 million by 2020. Early diagnoses and IOP reduction are important for disease management. This study evaluates the comparative inspection of cup-to-disc ratio and intraocular pressure in patients with standard color vision and those with color vision anomalies, focusing to enhance early diagnostic treatment plans and personalized administrative approaches.

Objective: To find the impact of normal tension glaucoma on color vision and stereopsis. To find which type of color vision deficiency is more frequently affected in young adults with normal tension glaucoma.

Material method: This cross-sectional study involves 93 patients of age group 15 to 35. The patients were examined after fulfilling inclusion and exclusion criteria. Analysis of color vision and stereopsis are done by D-15 color vision test and titmus fly test.

Results: This study includes 93 normal-tension glaucoma patients, 61 males and 32 females. Age distribution ranged from 15-35 years. Mean visual acuity of OD was 0.4153 and visual acuity of OS was 0.4409. Color vision assessment showed 76.3% normal in OD and 67.7% in OS. Stereopsis ranged by 40 to 200 seconds of arc with a mean of 91.61 and a standard-deviation of ± 34.74 seconds of arc.

Conclusion: This study provides important perceptions into color vision and stereopsis in young adults with normal tension glaucoma. Color vision anomalies are present and should be monitored. The changes in stereopsis emphasizes the need for detailed visual assessments in NTG patients. Differentiating the results of this study with the pre-existing literature highlight the significance of age-matched studies and recommends that the impact of NTG on visual functions is although not huge but still significant.

Key words: Color Vision, Glaucoma, Intraocular Pressure, Stereopsis