Which of the following is not a source of error in the applanation tonometry:
High Pressure on the globe
Tear film
Astigmatism
Wide pulse pressure
Tear film is required for accurate measurement , is not a source of error. Sources of error in tonometry: Inappropriate fluorescein pattern. Pressure on the globe. Central Corneal thickness. Corneal edema. Pulse pressure. Astigmatism. Incorrect calibration. Wide pulse pressure.
Glaucoma