A toric lens is used to correct: 

Although the trifocal power can be varied according to need,  it is usually _____________ percent of the Add power.

Renal stones most commonly contain calcium precipitates of:

As a rule, particularly in higher power lenses, the multifocal should be turned around to measure the Add power in the lensometer.  This is because of the difference between front vertex power and back vertex power. 

All of the following are characteristics of a lens to correct simple myopia except:

The use of a thiazide diuretic to control blood pressure in hypertensive patients could put them at risk for

How many optical centers does a  Single Vision lens of +2.00 -1.00 x180 power have?

Which of the following is TRUE regarding pancreatic enzyme replacement therapy?

Case Study #1RF is 45 yo, married, and works as a city engineer for a large municipal government. He cited a recent hx of nausea, anorexia, hematuria, and swollen ankles during a physical examination. His wife reported that he had been tiring more easily than usual during the past year. A hx of prior illnesses proved negative, except for a severe case of influenza with sore throat 10 years ago. RF’s BP was 160/98 and he has lost 4 kg during the past 2 months. A urinalysis shows albumin and red and white blood cells. He is 6′ 1″ and 172 lbs. His current urine output is approximately 450 cc/day.Lab values are as follows:BUN 93 mg/dl GFR 19 ml/min HCT 32% Hgb 11 mg/dl (14-17.4 for males) What factors affect the amount of protein needed by persons with chronic renal failure (or CKD, chronic kidney disease)? What amount would you recommend for RF? How would this change when be begins dialysis?

Which mineral has not been suggested as a way to improve (lower) blood pressure when consumed in adequate amounts?