An optometrist is a medical professional who specializes in examining and treating the eyes and vision. They perform comprehensive eye exams, diagnose vision problems, and prescribe corrective eyewear, such as glasses and contact lenses. They also play a crucial role in detecting and managing eye diseases and disorders, such as glaucoma, cataracts, and macular degeneration. Additionally, optometrists can work closely with other healthcare providers to provide comprehensive care for patients with chronic conditions that affect the eyes, such as diabetes.