tonometry

Indications

• evaluation of increased intraocular pressure

Methods

• Contact tonometry
  • Schiotz tonometer
    • hand-held device easy to use
    • accuracy affected by:
      • improper placement
      • eyelid closure
    • sterilization between patients required to prevent transmission of disease (i.e. HIV etc.)
  • Goldmann's applanation tonometer
    • most frequently used tonometer
    • attached to slit lamp
    • requires use of topical anesthetic
• Non-contact tonometry
  • measures pressure using jet of air to depress globe
  • pressure recorded by pneumotonometer
  • good for screening large numbers of patients
  • may require several measurements for accurate reading

Procedure

• measures the intraocular pressure of the eye by determining the amount of pressure needed to depress the cornea

More general terms

• clinical procedure

More specific terms

• Goldman applanation tonometry (GAT Tapp, Ta)
• intraocular pressure (IOP) by applanation tonometry (Ta)
• intraocular pressure (IOP) by pneumatonometer (Tp)
• intraocular pressure (IOP) by Shiotz tonometry (Ts)
• intraocular pressure (IOP) by TonoPen (Tpen)

Additional terms

• intraocular pressure (IOP)