Pachymetry

 

Pachymetry is a diagnostic procedure used to measure the thickness of the cornea, the clear front surface of the eye. It is an important test in ophthalmology, particularly for diagnosing and managing various eye conditions.

• Maurice and Giardini (1951) – early slit-lamp pachymetry.

• Doughty & Zaman (1968+) – pioneers in ultrasound pachymetry validation.

Types Of Pachymetry

 

Types of Pachymetry

1. Ultrasound Pachymetry

                Uses ultrasonic waves.

                 A small probe touches the cornea.

                  Quick and widely available.

2. Optical Pachymetry

              Uses light-based methods (e.g., Scheimpflug imaging, OCT).

                Non-contact, more advanced, often part of corneal topography.

Results In Pachymetry 

                                          

Clinical Importance Of Pachymetry 

Clinical Importance

• Glaucoma: Corneal thickness affects intraocular pressure (IOP) readings. Thin corneas may underestimate IOP, increasing glaucoma risk.
• LASIK/PRK Suitability: Determines if the cornea is thick enough for safe refractive surgery.
• Keratoconus Diagnosis: Helps detect corneal thinning patterns.
• Corneal Edema Monitoring: Assesses swelling post-surgery or due to disease.

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