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Home » What's New » What is the Ancaster Pachymeter?

What is the Ancaster Pachymeter?

eye exam ancaster onA Pachymeter is a medical device used to measure the thickness of the cornea. Pachymetry, the corneal thickness measurement, has a number of uses in comprehensive Optometric care.

Modern devices use ultrasound technology, while earlier models were based on optical principles. The ultrasonic Pachymeters traditionally have been devices that provide the thickness of the human cornea in the form of a number in micrometres that is displayed to the user. The newer generation of ultrasonic pachymeters work by way of Corneal Waveform (CWF).

Using this technology the user can capture an ultra high definition echogram of cornea, think of it as a corneal A-scan. Pachymetry using the corneal waveform allows the user to more accurately measure the corneal thickness, have the ability to check the reliability of the measurements that were obtained, have the ability to superimpose corneal waveform to monitor the change of patients cornea over time, and ability to measure structures within the cornea such as micro bubbles created in the cornea during femto-second laser flap cut.

Pachymetry is extremely important in determining whether laser eye surgery (PRK, LASIK or Intralase) is suitable for a patient. No matter which type of refractive laser surgery is performed, corneal tissue is removed in the re-contouring of the cornea. The higher the prescription, the more tissue removed. Naturally, there must be a limit to the amount of tissue removed. Pachymetry allows us to determine if a patient has enough tissue to safely have laser surgery.

Corneal pachymetry is an important test in the early detection of certain types of glaucoma. It also can be used in the screening of Keratoconus, a progressive corneal condition.

Our Ancaster Optometrist office prides itself on being a progressive optometry office with state of the art equipment and technology.  We embrace new technology and advances in eye health, while providing the highest level of care and a pleasant environment for our patients.