The Essentials of CCNA Routing and Switching Webinar Series. Learn more about the exciting redesign of the CCNAÂ® Routing and Switching certification. CCNA R&S Training Videos. Preview CCNA R&S training videos that are offered as part of a Cisco Learning Network Premium subscription.
Explore Optometry. Home / Education / Admissions / Explore Optometry. A Doctor of Optometry (OD) is an independent, primary health care provider who examines the visual system, the eye and associated structures, as well as diagnoses, treats and manages related diseases and disorders. Optometry involves much more than prescribing and fitting glasses and contact lenses.
Optometrists dilate a person's eyes so they can see the inside and back of the eyes. An eye exam should be performed annually. An ophthalmologist examines a patient. Normally, a person's pupils contract when light is bright. Routine eye exams are painless and can help detect vision or eye problems early.