[Physical technical calibration of a new self-tonometer]

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Metrology

Context:

• Applanation tonometry is crucial for diagnosing glaucoma.
• Microprocessor-controlled tonometers require rigorous calibration for accuracy.
• Standardized calibration methods ensure reliable diagnostic data.

Purpose:

• To calibrate a microprocessor-controlled applanation tonometer for force measurement and area detection.
• To establish standardized conditions for technical precision comparison.
• To validate the instrument's performance irrespective of its position.

Summary:

• The applanation tonometer was calibrated using weights and silicon pistons for force and area detection.
• Vertical position force measurements met official calibration requirements.
• A method for optical sensor calibration using silicone pistons was demonstrated and proposed for extension.

Impact:

• Enables comparison of technical precision under standardized conditions.
• Facilitates comparison with previous clinical examination results.
• Ensures accurate intraocular pressure measurements regardless of tonometer orientation.