Noncontact tonometry in perforating corneal injuries

Area of Science:

• Ophthalmology
• Ophthalmic Trauma
• Diagnostic Procedures

Background:

• Corneal perforations are serious eye injuries requiring careful management.
• Noncontact tonometry is a common method for measuring intraocular pressure.
• Assessing intraocular pressure in eyes with corneal injuries presents unique challenges.

Observation:

• A case study involving a patient with a self-sealed corneal perforation is presented.
• Puff tonometry was administered shortly after the corneal injury.
• The air jet from the tonometer disrupted the wound integrity.

Findings:

• The puff noncontact tonometer's air jet caused the self-sealed corneal perforation to reopen.
• An air bubble entered and filled the anterior chamber following the tonometry procedure.
• This indicates a potential complication of using puff tonometry in specific corneal injury cases.

Implications:

• Puff tonometry may not be a safe diagnostic tool in the immediate aftermath of a corneal perforation.
• Alternative methods for intraocular pressure measurement should be considered in such cases.
• Further research is needed to establish safe and reliable tonometry protocols for eyes with corneal injuries.