* Optic: Relating to the eye or vision.
* Optician: A person who makes or sells eyeglasses.
* Optometrist: A healthcare professional who examines eyes and prescribes corrective lenses.
* Optometry: The profession of examining eyes and prescribing corrective lenses.
* Optical: Relating to the eye or vision, especially the science of optics.
* Optics: The branch of physics that studies light and its properties, including reflection, refraction, and diffraction.
* Myopia: Nearsightedness.
* Hyperopia: Farsightedness.
* Presbyopia: A condition in which the eye's lens loses its ability to focus on near objects, usually with age.
* Diopter: A unit of measurement for the refractive power of a lens.
These words all relate to the eye or vision and share the common root "opt" from the Greek word "ὀπτικός" (optikos), meaning "relating to the eye."