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.
An optometrist may perform an eye exam and write a prescription for corrective lenses, while an optician may fill that prescription. An ophthalmologist is a medical doctor who specializes in all aspects of eye care including diagnosis, management, and surgery of ocular diseases and disorders.