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Types of Pachymetry

Different Types of Pachymetry Methods and Devices

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While there are an array of different types of pachymetry and devices, the corneal pachymeter is a device used to measure the thickness of the cornea prior to performing a complex procedure. Corneal pachymetry is a critical process and bears a significant amount of importance.

It was originally used to gauge the functional status of the corneal endothelial cell layer. However as more surgical refractive techniques emerged, corneal pachymetry became more necessary to determine whether candidates were suitable for ablation procedures.

In addition, the identification of central corneal thickness can serve as an individual indicator of glaucoma risk. Because of this, corneal pachymetry should be a routine component of the ophthalmic evaluation.

Today, several techniques are available to reliably measure corneal thickness. The actual methodologies used in these techniques are based on either

Although each type of pachymeter has peculiarities of its own, most of them are considered to be reliable. Yet, the systematic differences that between different types of pachymetry results can render different values. Because of this, you cannot substitute measurements between different modalities. Let’s take a deeper look at different pachymetry methods and different types of pachymetry devices.

Traditional Ultrasound Pachymetry

With a range between 10 MHz and 20 MHz, traditional ultrasound pachymeter offers ease of use and exceptional portability. These dry contact systems are very cost-effective and simple to use. Yet, the accuracy of the traditional ultrasound pachymeter is heavily dependent on the perpendicularity of the probe’s application to the cornea.

In addition, the reproducibility relies on the practitioner’s ability to place the probe precisely. Very-high frequency ultrasound (70 MHz) and ultrasound biomicroscopy (50 MHz) both require a water bath — which can be viewed as a disadvantage.

Ultra-Modern Pachymetry Methods

Traditional pachymeters are designed to measure the thickness of the cornea in micrometers; while more updated ultrasonic pachymetry can measure by corneal waveform — a new unit. Today's ultra-modern technology allows practitioners to capture UHD echogram of the eye tissue similar to an eye scan.

This method allows you to achieve more accurate measurements of the corneal thickness than any other type of pachymeter. This method also plays a significant role in measuring various structures within the tissue in the cornea.

Different Types of Pachymeters: PachPen & PachPen Vet

As the perfect combination of comfort, portability, and accuracy, Accutome's handheld PachPen Vet and handheld PachPen are two of the most popular types of pachymetry. They boast a superior ergonomic design that will fit comfortably in the hand of a practitioner, which is a significant improvement over other handheld models.

The PachPen also comes with Accutome's Digital Signal Analysis, which negates all non perpendicular measurements on the cornea. Key features of the PachPen and PachPen Vet include:

  1. PachPens only weigh a mere 3 ounces
  2. 65 MHz sampling probe ensures you achieve precise measurements
  3. A durable lithium battery will withstand approximately 15,000 readings
  4. Receive accurately converted IOP measurements in a matter of seconds
  5. The gentle touch probe is only 2.5mm in diameter to offer patient comfort
  6. Easy-to-use ergonomic design that fits comfortably in your hand
  7. The versatility of the device improves ease-of-use and saves time.

Different Types of Pachymeters: AccuPach VI Pachymeter

Boasting the unique and exclusive Digital Signal Analysis, the AccuPach VI Pachymeter delivers remarkable accuracy and repeatability. The integrated IOP conversion feature makes calculating IOP easy and quick.

This device also features a voice output, so you can focus on your patient while the AccuPach VI delivers audible measurements. A few key features of the AccuPach VI Pachymeter include:

  1. Easy integration with a printer or computer through a USB Memory Stick.
  2. User-friendly touch screen simplifies mastery and improves efficiency.
  3. You can easily view different angles with an adjustable handle and stand.
  4. Digital waveform analysis ensures measurements are aligned properly.
  5. Optional AccuPach VI keyboard helps improve data input and accuracy.
  6. World-class voice output features provides audible readings that allow you to focus more on the patient's cornea and their needs.
  7. Receive accurately converted IOP measurements in a matter of seconds.
  8. The AccuPach VI is wall mountable, slit lamp, or desktop device.

Contact Keeler USA for Different Types of Pachymetry

The corneal pachymeter is a device used to accurately measure the thickness of the cornea prior to a complex procedure. And the experts at Keeler Ophthalmic Instruments bring more than a century of experience creating accurate and reliable pachymeters. We'll use our manufacturing expertise to help you choose the best device based on the unique needs of your practice.

Contact Keeler Ophthalmic Instruments to learn more about the different types of pachymetry devices.

About the Author Eugene VanArsdale

Eugene is the Director of Marketing Communications at Keeler Instruments. He has been with Keeler since 1982 and is co-holder of two patents for the company. Eugene has a true passion for the eye care industry and has dedicated himself to understanding the ins and outs of the optometric and ophthalmic equipment market.