Ncle Test - Questions And Verified Solutions

A dense white appearance of the entire peripheral circumference of the cornea which does not stain and is often seen in the elderly is known as: a. neovascularization b. Dellen c. Arcus senilus d. Corneal ulcer {Ans: c. Arcus senilus}Which of the following polishing compounds should not be used with gas permeable lenses? a. Sil 02 care b. Silvo c. Alox PG d. X Pal {Ans: b. Silvo}In choosing the diameter of a soft lens, what is the general rule of thumb? a. 1.0 mm larger than HVID b. 2.0 mm larger than HVID c. 3.0 mm larger than HVID d. none of the above {Ans: b. 2.0 mm larger than HVID}The normal cornea is in a state of a. Turgesence b. Deturgesence c. Hyperemia d. Hypoxia {Ans: b. Deturgesence}Contact lens power should be specified in- a. back vertex power b. sphero-cylinder power c. power in situ d. posterier apical radius {Ans: a. back vertex power}A warped lens will show___________ base curve(s) on the radiuscope and a ________ power on the lensometer. a. one/spherical b. two/sphero-cylindrical c. one/sphero-cylindrical d. two/spherical {Ans: d. two/spherical}