Colour deficiency: Commonly called colour blindness is a lack of ability to distinguish certain colours. The most common form is the inability to distinguish shades of red and green.

Cornea: Transparent tissue covering the front of the eye that lets light travel through.

Fovea: Located in the center of the macula and contains only cone receptors. It allows us to see things sharply.

Iris: The colored part of the eye with muscles that control the size of the pupil.

Lens: Located directly behind the pupil, it focuses light rays onto the retina.

Macula: The part of the retina responsible for sharp, central vision needed to read and drive.

Ocular Disorder: A disorder of the eye.

Optic Nerve: A bundle of nerve fibers that carry messages from the eyes to the brain.

Photophobia: Also called light sensitivity. It is a condition that can have many underlying causes and can be prompted by many medications. Protection from UV radiation is critical for anyone with this condition.

Pterygium: This is a raised growth on the eye that is most often directly related to over-exposure to the sun. Dry, dusty conditions may also be a factor. Protecting your eyes from UV radiation is a preventative measure.

Pupil: An opening in the center of the iris that changes size to control how much light is entering the eye.

Retina: Part of the eye that changes light that enters into nerve signals.

Rods and cones: Special receptors in the eye used by the retina to process light.

Sclera: The white part of the eye that is composed of fibrous tissue that protects the inner workings of the eye.

Snellen Chart: The chart topped by a large letter is used in eye examinations which measures your eye’s visual acuity, or the ability to see sharp detail clearly.

Ultraviolet radiation (UVR): Commonly referred to as UV Rays consist of both UVA and UVB rays from the sun. Without proper protection, UV rays can contribute to various eye conditions.