Contact Lens – NCLE Exam Questions and Answers 100% Pass

Contact Lens – NCLE Exam Questions and Answers 100% Pass Increasing the sagittal depth of a rigid lens will: - Correct Answer ️️ -Not change the effective power of the lens If the diameter of an R.G.P. lens is 9.2 mm and is fitting too steep on the cornea, what adjustment could be made to the lens? - Correct Answer ️️ -Decrease the diameter The DK value of a lens is: - Correct Answer ️️ -Oxygen permeability of the material All of the following are functions of a wetting solution except: - Correct Answer ️️ -It helps to clean the lenses after removal from the eye Development of new blood vessels in the cornea is called: - Correct Answer ️️ - Vascularization The original rigid material used in contact lens manufacturing is: - Correct Answer ️️ - Poly methyl methacrylate When wearing minus contact lenses,, what would be a big advantage of the contacts over spectacles? - Correct Answer ️️ -Enlarged field of view What would be a disadvantage to hydrophilic contact lenses? - Correct Answer ️️ - Deposit formation If the base curve of a contact lens measures 45.OOD, its radius of curvature is: - Correct Answer ️️ -7.50 mm Which of the following radii of curvature would indicate the steepest base curve? - Correct Answer ️️ -*a. 7.3 0 mm b. 7.40 mm c. 7.50 mm d. 7.60 mm The term "Haptic lens" is often used in reference to: - Correct Answer ️️ -Scleral lens Which of the following instruments cannot be used to check the diameter of a contact lens? - Correct Answer ️️ -Lens clock A contact lens is quite loose. Its base curve is 7.40 mm. In order to obtain a tighter fit, we might change the base curve to: - Correct Answer ️️ -7.35 mm When checking the base curve of a contact lens, the tolerance should be: - Correct Answer ️️ -+0.05mm Bitoric lenses are used: - Correct Answer ️️ -when there is a great deal of corneal astigmatism Prism ballast lenses are used: - Correct Answer ️️ -To keep the lens from rotating All of the following are symptoms of a loose fitting contact lens except: - Correct Answer ️️ -a. Difficulty moving eyes b. Lid sensation c. Lens popping out *d. Burning The tolerance of the posterior, secondary, intermediate or peripheral curve radius according to ANSI standards is: - Correct Answer ️️ -+0.10 mm The tolerance of the prism power (measured from the geometric center) of a