NCLE Practice Test Questions Answered
Correctly.
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.
Toric Lenses - Answer Anterior (front surface), back spherical surface or posterior (back surface), toric
back curve
Front Toric Lens - Answer Corrects a low to moderate amount of corneal astigmatism
Back Toric Lens - Answer Corrects a mid to high amount of corneal astigmatism
Bitoric Lens - Answer Corrects 1.50D of corneal astigmatism and high residual astigmatism
Aphakic - Answer Condition of no crystalline lens
Psuedophakic - Answer Implant, intraocular lens
Corneal Edema - Answer Always causes a poor fitting lens
Spectacle Blur - Answer Temporary blurred vision upon switching from contact lenses to eyeglasses
Crystalline Lens - Answer The main focusing mechanism of the eye
The Main Supply of Oxygen to the cornea is provided by - Answer Tear Film
Keratometry mires which are only clear when the wearer blinks are indicative of a - Answer Steep Fit
Keratometry mires which blur immediately following blink are indicative of a - Answer Flat Fit
Correctly.
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.
Toric Lenses - Answer Anterior (front surface), back spherical surface or posterior (back surface), toric
back curve
Front Toric Lens - Answer Corrects a low to moderate amount of corneal astigmatism
Back Toric Lens - Answer Corrects a mid to high amount of corneal astigmatism
Bitoric Lens - Answer Corrects 1.50D of corneal astigmatism and high residual astigmatism
Aphakic - Answer Condition of no crystalline lens
Psuedophakic - Answer Implant, intraocular lens
Corneal Edema - Answer Always causes a poor fitting lens
Spectacle Blur - Answer Temporary blurred vision upon switching from contact lenses to eyeglasses
Crystalline Lens - Answer The main focusing mechanism of the eye
The Main Supply of Oxygen to the cornea is provided by - Answer Tear Film
Keratometry mires which are only clear when the wearer blinks are indicative of a - Answer Steep Fit
Keratometry mires which blur immediately following blink are indicative of a - Answer Flat Fit
