Preceptorship MCQs

1.    Which among the following is true for Goldman Applanation tonometer?

• a. Constant force, constant area

• b. Variable force, variable area

• c. Constant force, variable area

• d. Variable force, constant area

2. Which of the following is true for Goldman applanation tonometer?

• a. Diameter of external area of Corneal applanation is 3.06mm

• b. Diameter of external area of Corneal applanation is 7.35mm

• c. Internal area of applanation obtained is 7.35mm2

• d. Internal area of applanation

3. All of the following may result in underestimation of IOP except:

• a. Post LASIK

• b. Post PRK

• c. Corneal edema

• d. Corneal scar

4. Which among the following statements are correct ?

• a. For every 3 diopters (D) of increase in corneal astigmatism power, IOP increases by 1mmHg

• b. Orienting the applanation head so the split rings occurred over the flat meridian and then orienting the rings over the steep meridian. The mean of the two pressures produced a reading close to the true intraocular pressure reading

• c. Readings can be taken with the tonometer head in the usual horizontal position and then the tonometer head be twisted 90”and another reading be taken. The sum of the horizontal and vertical applanation head readings should be averaged and the average should be considered the IOP.

• d. Both a and b are correct

• e. All of the above are correct

5. How frequently a Goldman applanation tonometer needs to be calibrated?

• a.  Every month

• b. Every year

• c. Once in 3 years

• d. Never

6. 6. What is the recommended acceptable range of Calibration error for Goldman applanation tonometer?

• a. +/-0.5 mmHg at all 3 levels of testing

• b. +/-1 mmHg at all 3 levels of testing

• c. +/-2 mmHg at all 3 levels of testing

• d.  All of the above