<prompt> IOP is most accurately measured bySchiotz tonometerApplanation tonometerNon contact tonometerDigital tonometer  <response>: Answer: b Applanation tonometer BASAK 4th ED, P-262Measurement of IOP:1. Contact Tonometer Indentation tonometer When placed on a eye, the plunger together with a present weight, indents the cornea. The amount of indentation is measured on a scale and the IOP can be calculated Not accurate since IOP measured is influenced by scleral rigidity Types Schiotz manual MacKay-Marg electronic Applanation tonometer Based on the principle of Imbert-Ficks law Applanation tonometer measures the IOP by flattening the cornea over a specific area 3.06mm More accurate since the pressure values are not influenced by scleral rigidity Types Goldmann slit-lamp mounted Parkins hand-held2. Non-Contact tonometer3. Digital tonometry: IOP is roughly assessed by digital palpation, fluctuating the down-turned eye between two index fingers through the upper lid 