NCLE Practice Test 150 Questions and Answers 100 Verified, Exams of Nursing

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For more files @ [email protected] 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 - Answer d) have the ability to reproduce 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 - Answer a)-4.50 +1.00 x75 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 - Answer c) a set of steel balls of known radii 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 - Answer b)has a smaller diameter 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 - Answer c) use of anti-histamines 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 - Answer a) a good fit 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) alens fit that is too loose d) inability to wear soft lenses - Answer a) solution reaction Which of the following is the mode of slit-lamp illumination used to view the early stages of microcystic edema? a) Retroillumination b) increased optical zone c) decreased optical zone d) flattened base curve - Answer b) increased optical zone Which curve would a fitter modify to allow more tear flow under the edge of a rigid lens? a) Posterior peripheral curve b) Optical curve c) Anterior peripheral curve d) Anterior central curve - Answer a) Posterior peripheral curve If a well fitted diagnostic lens has a -3.00 power and the over-refraction at 12mm is -2.00, the correct lens power to order is: a) -4.50 b) -4.75 c) 5.00 d) -5.25 - Answer c) -5.00 For a patient with 1.25D of with-the-rule astigmatism, who is active outdoors and who operates heavy construction equipment, the most appropriate type of contact lens would be: a) soft toric lenses b) spherical gas permeable lenses c) spherical soft lenses d) toric gas permeable lenses - Answer a) soft toric lenses Which of the following instruments is most commonly used to measure the diameter of the optical zone of a contact lens? a) contactometer b) radiuscope c) measuring magnifyer d) lensometer - Answer c) measuring magnifyer According to the US Food and Drug Administration, the maximum time allowable for continuous wearing of silicone hydrogel lenses is: a) 7 days b) 14 days c) 21 days d) 30 days - Answer d) 30 days When ridig lenses are received from the manufacturer, which of the following instuments is not needed for inspection and verification? a) biomicroscope b) radiuscope c) lensometer d) measuring magnifyer - Answer a) biomicroscope When using a lid manipulation to assist in "popping" a rigid lens off the eye, the wearer should first make sure that the: a) lower lid meets the lower part of the cornea b) lens is resting on the cornea, where the fissure is widest c) edge of the lens has been located with a penlight d) lens is resting on the sclera, where the tissue is widest - Answer b) lens is resting on the cornea, where the fissure is widest The most effective way to remove a soft contact lens that has adhered to the cornea is to: a) firmly press the lids against the sclera with fingertips, release, then blink the lid closed firmly b) gently pinch the lens directly off the cornea with clean fingertips c) affix a suction cup to the center of the lens and pull it straight away, using steady pressure d) irrigate the eye with lubricant until the lens moves freely, then remove as usual - Answer d) irrigate the eye with lubricant until the lens moves freely, then remove as usual Following the fitting and dispensing of any continuous wear contact lenses, it is advisable to see the patient: a) the following morning b) in 2 weeks c) within 2 days d) in 1 week - Answer a) the following morning The fitter can differientiate between a back toric lens and bitoric lens by utilizing a: a) radiuscope b) keratometer c) profile analyzer d) lensometer - Answer a) radiuscope The instrument designed primarily to measure the base curve of a contact lens is the: a) keratometer b) radiuscope c) lensometer d) ophthalmascope - Answer b) radiuscope The most frequently used corneal contact lenses for patients with keratoconus are: a) specially designed cone lenses b) bandage contact lenses