NCLE Practice Test questions and answers well detailed/latest update.

NCLE Practice Test questions and answers well detailed/latest update. A Correct Statement regarding epithelial cells is that they: a)Comprise the posterior layer of the cornea b)Are unable to regenerate c)Comprise the thickest layer of the cornea d) Have the ability to reproduce - correct answer.d Which of the following prescriptions indicates against-the-rule astigmatism? a)-4.50 +1.00 x75 b)-4.50 +1.00 x 180 c)-4.50 -1.00 x 165 d)4.50 -1.00 x 180 - correct answer.a When a keratometer is being calibrated, which of the following targets will provide the most reliable result? a)the single-cut anterior surface of a high-plus lens b)a perfectly flat highly polished mirror c) a set of steell balls of known radii d)the unfinished posterior surface of a low-minus lens - correct answer.c Inadequate movement of a soft lens can be corrected by using a lens that a) has a steeper base curve b) has a smaller diameter c) has a larger diameter d) has a higher water content - correct answer.b A long-term, successful, hydrogel contact lens wearer suddenly develops dry eyes. Which of the following is most likely to cause this problem? a) Use of oxidative solution b) use of rewetting drops c) use of anti-histamines d) Wearing of lenses in the wrong eyes - correct answer.c During slit-lamp evaluation, on upward gaze, a patient's soft contact lenses move 0.5 to 1mm when the patient blinks. These lenses are: a) a good fit b) too loose c) too tight d) too large - correct answer.a A new daily wearer of soft lenses returns for the first follow up visit with itching, burning, injected eyes. The most likely cause of these problems is: a) solution reaction b) giant-cell papillary conjunctivitis c) a lens fit that is too loose d) inability to wear soft lenses - correct answer.a Which of the following is the mode of slit-lamp illumination used to view the early stages of microcystic edema? a) Retroillumination b) Direct illumination c) Parrallelpiped d) Oscillation - correct answer.a Which of the following changes is best able to improve oxygen transmissibility to a patient's cornea? a) Increasing tear exchange b) Increasing Dk c) Increasing optical zone diameter d) Increasing CN bevel - correct answer.b In using fluorescein to evaluate the fit of a rigid lens of 9.0mm diameter on a typical eye, a correct statement is that: a) apical touch with pooling in the PPC curve area is preferred b) apical toxicity may not be obvious c) apical pooling with edge touch is recommended d) apical area, mid-peripheral area, and the lens edges should be assessed - correct answer.d Which of the following changes would improve a rigid contact lens fit that shows sluggish movement after 1 hour of wear? a) Add hyperflange edge treatment b) Reduce overall diameter c) Decrease center thickness d) Increase overall diameter - correct answer.b Moving a +7.50 RX from the spectacle plane to the corneal plane will require: a) no change in power b) more minus power c) more plus power d) less plus power - correct answer.c A fluorescein pattern that has a black area over the corneal apex and a diffuse green area in the periphery normally indicates: a) flat fit b) steep fit c) normal fit d) tight fit - correct answer.a IPC's are used to: a) provide a transition between the peripheral and base curves b) reduce edge thickness and lens mass c) increase the optical zone d) smooth the lens edge - correct answer.a