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Glossary

Navigate the language of eyecare with confidence. From clinical terms to practice management concepts, find clear definitions of the key language used across the optical industry.

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A

Afferent Pupillary Defect
What is an Afferent Pupillary Defect (APD)? An afferent pupillary defect (APD) is an abnormal pupil response caused by reduced afferent (sensory) input from…

D

Distance Visual Acuity (DVA)
What Is Distance Visual Acuity (DVA)? Distance visual acuity (DVA) measures how clearly a person can see objects at a…

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Electronic Health Record (EHR)
What Is an Electronic Health Record (EHR)? An electronic health record (EHR) is a digital record of a patient’s health…

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General Optical Council (GOC)
What is the General Optical Council (GOC)? The General Optical Council (GOC) is the statutory regulator for optical professions and…

I

Intraocular Pressure (IOP)
What Is Intraocular Pressure (IOP)? Intraocular pressure (IOP) is the pressure created by the fluid inside the eye. A healthy…

N

Near Point of Convergence (NPC)
What is Near Point of Convergence (NPC)? Near Point of Convergence (NPC) is the closest distance from a person’s face…
Near Vision
What is Near Vision? Near vision is the ability to see and resolve fine detail at close range. It applies…

V

Visual Acuity
What is Visual Acuity? Visual acuity (VA) refers to the ability of the visual system to resolve spatial detail As…