Related Experiment Video
Updated: Aug 14, 2026

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
Published on: May 25, 2020
Visual impairment and eye abnormalities in Oklahoma Indians
Elisa T Lee1, Dana Russell, Tracy Morris
1Center for American Indian Health Research and Department of Biostatistics and Epidemiology, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City 73104, USA.
Visual impairment and eye conditions like age-related macular degeneration and diabetic retinopathy are more common in Oklahoma Indians. Early detection and prevention programs are crucial for eye health.
Area of Science:
- Ophthalmology
- Public Health
- Epidemiology
Background:
- Eye diseases pose a significant public health challenge, particularly in specific ethnic populations.
- Understanding the prevalence of visual impairment and ocular abnormalities is essential for targeted interventions.
Purpose of the Study:
- To determine the prevalence of visual impairment and various eye abnormalities in Oklahoma Indians.
- To identify the primary causes of visual impairment within this demographic.
Main Methods:
- A cross-sectional study involving 1019 Oklahoma Indians aged 48-82 years.
- Comprehensive eye examinations including visual acuity testing and ophthalmoscopic evaluation.
- Grading of fundus photographs by a specialized reading center to assess specific conditions.
Main Results:
- Prevalence of age-related macular degeneration (AMD), cataract, and diabetic retinopathy was 33.6%, 39.6%, and 20.1%, respectively.
- Cataract and AMD were the leading causes of visual impairment; 0.6% were legally blind.
- Pinguecula (42.4%) and dermatochalasis (30.1%) were common findings, while other abnormalities were rare.
Conclusions:
- Oklahoma Indians exhibit a higher prevalence of visual impairment, AMD, and diabetic retinopathy compared to other ethnic groups.
- There is a clear need for effective treatment and prevention programs tailored to eye diseases in this population.
Related Concept Videos
Photoreceptors and Visual Pathways
Focusing of Light in the Eye
Accessory Structures of the Eye
Diabetic Retinopathy
