NCLE Practice Test Practical Questions and Answers with Certified Solutions

NCLE Practice Test Practical Questions and Answers with Certified Solutions Steep Fluorescein Pattern -Answer Bright green pooling center, very faint green pooling on diameter of lens Flat Fluorescein Pattern -Answer Bright green pooling on diameter of lens, very faint green in center Against-the-rule Astigmatism Pattern -Answer Bright green pooling horizontally, faint green pooling vertically With-the-rule Astigmatism Pattern -Answer Bright green pooling vertically, faint green pooling horizontally Prism Ballast -Answer Common technique to stabilize lens from rotating. Added thickness will position lens inferiorly (bottom of cornea) Truncation -Answer Cutting off .50mm to 1.50mm of bottom edge of lens to provide stability. Reduces diameter, making a looser fit. Double Slab-off -Answer Lens is thicker centrally and thinner at top and bottom of lens. Provides comfort to wearer, but may cause some stability issues. Aspheric Lens Design -Answer Hyperflange -Answer Used to correct high riding minus lenses. Myoflange -Answer Used to correct low riding plus lenses. Monovision -Answer Corrects presbyopia in contact wearers. One eye uses distance (dominant) and the other eye uses reading (resessive) Segment Bifocal -Answer Same concept as spectacle bifocal. Must be prism ballast. Often crescent shaped.