Astigmatism: a defect in the eye or in a lens caused by a deviation from spherical curvature, which results in distorted images, as light rays are prevented from meeting at a common focus.
Cataracts: a medical condition in which the lens of the eye becomes progressively opaque, resulting in blurred vision.
Depth Perception: the ability to perceive the relative distance of objects in one's visual field.
Diabetic Retinopathy: a diabetes complication that affects eyes. It's caused by damage to the blood vessels of the light-sensitive tissue at the back of the eye.
Dilation: the action or condition of the pupil becoming or being made wider, larger, or more open aided with dilation drops.
Dry Eye: a common condition that occurs when your tears aren't able to provide adequate lubrication for your eyes.
Glaucoma: a condition of increased pressure within the eyeball, if not treated it can cause gradual loss of sight
Hyperopia: a condition of increased pressure within the eyeball, causing gradual loss of sight
Hypertension: High blood pressure.
Macular Degeneration: eye disorder that happens when the small central portion of your retina, called the macula, wears down.
Meibomian Gland: oil glands along the edge of the eyelids where the eyelashes are found. These glands make oil that is an important part of the eye's tears. The oily layer is the outside of the tear film that keeps tears from drying up too quickly.
Presbyopia: farsightedness caused by loss of elasticity of the lens of the eye, occurring typically in middle and old age; commonly referred to as "old eyes".
Refraction: how the power of eyeglasses or contact lenses is calculated
Retina: the light-sensitive tissue at the back of the eye.
Snellen Chart: A chart for testing visual acuity, usually consisting of letters, numbers, or pictures printed in lines of decreasing size which a patient is asked to read or identify at a fixed distance.
Visual Acuity: sharpness of vision, measured by the ability to discern letters or numbers at a given distance according to a fixed standard,.