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LDO Review Contacts

The central posterior curve is also known as what? Base curve
What is the chord diameter over which the base curve extends on the posterior surface of the contact lens? Optical Zone
What lies between the base curve and the peripheral curve on the posterior lens surface? Secondary curve or intermediate curve
What is the outermost curve on the posterior lens surface? Peripheral curve
What is the treatment given to the sharp junctions between the base curve, secondary curve, and peripheral curve? Blending
the overall width of the lens from one edge to the other and is measured in mm is called what? Diameter
what is the measurement taken from the anterior surface to the posterior surface of the lens at its geometric center? Center thickness
What is the curvature that determines the lens power? Anterior optical zone radius
The difference between the radii of the anterior and posterior lens surfaces creates what? Lens power
What does lenticular flange do to a contact lens? Aid in lens positioning by increasing or decreasing edge thickness
When a contact lens sits low on the cornea would you increase or decrease the edge thickness? Increase
When angulation is placed on the front surface of a lens to reduce edge thickness and decrease lid sensation its called what? CN Bevel
Would you do a CN bevel for a high minus or high plus lens. High minus
What is designated to limit lid irritation and keeps the posterior surface away from the cornea? Lens edge
The edge of a lens has 3 zones, what are they? Anterior, posterior, and edge apex.
Created by: Kayla Carpenter