NCLE basic Exam Kit | Q&A Latest Update 2024/2025 | 100% PASS

NCLE basic Exam Kit | Q&A Latest Update 2024/2025 | 100% PASS What is the Secondary/intermediate curve? - Answer -The curve on the posterior side of the contact lense between the base curve and peripheral curve. Usually 0.7mm to 1.6mm flatter than the base curve radius. The width is affected by the OZ diameter and peripheral width. What is the peripheral curve? - Answer -The outermost curve on the posterior side of the contact lens. It clears the flatter periphery and prevents lens impingement in the limbal areas What measurements effect the size of the peripheral curve? - Answer - The radius of curvature and width. Smaller diameter = steeper radius of curve Larger diameter = flatter radius of curve What is a blend curve? - Answer -A treatment given to sharp junctions caused by differences in radii of curvature. Mostly required between secondary and peripheral curve. Blended curve = secondary and peripheral average What is the diameter of the contact? Average diameter of an RGP lens? - Answer -The overall width of lenses from end to end in mm. RGP average is 7mm to 10.5mm