NCLE Test Questions & Answers 100% Correct

Contact lens power should be specified in- a. back vertex power b. sphero-cylinder power c. power in situ d. posterier apical radius - ANSWER-a. back vertex power The slit-lamp illumination that gives an overall view of the cornea but limits detail is- a. sclerotic scatter b. diffuse c. specular reflection d. oscilatory - ANSWER-b. diffuse When a keratometric miers reflected off a soft contact lens are only clear when the wearer blinks, the lens fit is too- a. small b. large c. steep d. flat - ANSWER-c. steep Transient keratometric mier distortion is usually due to- a. pre-ocular tear film abnormalities b. prolonged rigid lens wear c. prolonged soft lens wear d. irregular corneal astigmatism - ANSWER-a. pre-ocular tear film abnormalities Epithelial edema which manifests itself clinically as central corneal haze, is verified by the slit lamp using sclerotic scatter illumination. What specific technique does the examiner use to see this condition? a. the naked eye and an angle between the slit lamp beam and the eye of 90˚ b. the blue cobalt filter of the slit lamp and an angle of about 45˚ c. the green filter of the slit lamp with high magnification