NCLE Chapter 4 CL EXAM REVIEW Solved 100%

D. all of the above - Answer The eyelids play an important role in the fitting and wear of contact lenses for which of the following reasons? A. they effect the wettability of the lens serface B. they effect the positioning of the lens C. they are sensitive and generally cause most of the discomfort when a lens is first placed on the eye. D. all of the above C. Loose lenses - Answer Small puncuated stains on the corneal epithelium when seen under an ultraviolet light are most likely caused by: A. foreign bodies B. loose lenses C. tight lenses D. epical clearance lenses D. Too tight a lens - Answer After about four hours of wear, your patient complains that his eyes feel "hot". This may be an indication of: A. too small a lens B. too large a lens C. too loose a lens D. too tight a lens B. Rigid PMMA Lenses - Answer Three and nine O'clock staining is generally seen with: A. soft lenses B rigid PMMA lenses C. gas permeable lenses D. fluorocarbon lenses B. to reduce the lens diameter ASK - Answer A rigid gas permeable contact lens is causing a slight stagnation of tears over the carneal apex. One possible lens modification might be: A. to reduce the base curve radius B. to reduce the lens diameter C. to increase the lens diameter D. to fenestrate the lens ask