Pachymetry is a technique where we measure the corneal thickness. This can be done in a multitude of ways ranging from handheld ultrasound probes to measured focal points of corneal thickness as well as various scanning technologies, both with topographies, an Artemis very high frequency ultrasound guided pachymetry measurement and the idea of all of this to measure the patient’s preoperative pachymetry corneal thickness to ascertain if there is sufficient tissue to be able to perform a full correction of their refractive error.”
A pachymeter is a hand-held device used to measure the depth of the thinnest point of your cornea. Along with front and back surface topography, the thickness of your cornea is one of the most important safety factors in laser refractive surgery. Your surgeon should review these measurements, topography and pachymetry, to make surgery as safe as possible.
Using a pachymeter together with a topography device provides very accurate data, and ensures that the thickness of these areas is within acceptable safety limits. Ask your surgeon what kind of pachymeter they are using – the 50MHz model gives more detailed information than a 20-30MHz device.
A pachymeter is a medical device used to measure the thickness of the eye's cornea. It is used prior to LASIK surgery, and is useful in screening for patients suspected of developing glaucoma. Modern design incorporates ultrasound technology for measurement of the thickness. Earlier models were based on optical principles.
Until recently, pachymetric measurement of central corneal thickness (CCT) has been the exclusive territory of corneal specialists. After all, is an important tool to evaluate the health of the cornea, measuring its thickness to assess a capacity to pump out excess fluid and maintain clarity. Corneal specialists and general ophthalmologists continue to rely on accurate corneal pachymetry readings to manage patients with corneal ectasias (e.g., keratoglobus, pellucid degeneration, keratoconus), Fuchs’ endothelial dystrophy, bullous keratopathy, corneal rejection post – penetrating keratoplasty, and other causes of corneal edema. However, an increasing number of ophthalmologists are now obtaining CCT measurements on patients with (or suspected to have) glaucoma.
A variety of equipment are available for ophthalmologists to choose from. The most commonly used equipment uses ultrasound technology and is the clinical standard. Most of the clinical work studying the association between CCT and glaucoma has relied on ultrasound pachymetry. Ultrasound require contact with the cornea; the ophthalmologist delivers a drop of anesthetic to the eye and applies a sterile pachymeter tip gently onto the cornea. Ultrasounds continue to be popular, affordable and accurate, but a newer line of pachymeter that use optical low – coherence reflectometry technology may enhance accuracy and allow non – contact pachymetry. Studies comparing optical versus ultrasound pachymetry indicate that optical pachymetry is at least as accurate as ultrasound pachymetry when measuring CCT. Some optical instrument even allow real – time monitoring of measurements. Additional features that ophthalmologists may consider important when selecting the appropriate equipment, include portability, ability to communicate with office and surgical equipment (e.g. excimer laser), and built – in algorithms to estimate the “true IOP” from a CCT correction.
A pachymeter is a hand-held device used to measure the depth of the thinnest point of your cornea. Along with front and back surface topography, the thickness of your cornea is one of the most important safety factors in laser refractive surgery. Your surgeon should review these measurements, topography and pachymetry, to make surgery as safe as possible.
Using a pachymeter together with a topography device provides very accurate data, and ensures that the thickness of these areas is within acceptable safety limits. Ask your surgeon what kind of pachymeter they are using – the 50MHz model gives more detailed information than a 20-30MHz device.
A pachymeter is a medical device used to measure the thickness of the eye's cornea. It is used prior to LASIK surgery, and is useful in screening for patients suspected of developing glaucoma. Modern design incorporates ultrasound technology for measurement of the thickness. Earlier models were based on optical principles.
Until recently, pachymetric measurement of central corneal thickness (CCT) has been the exclusive territory of corneal specialists. After all, is an important tool to evaluate the health of the cornea, measuring its thickness to assess a capacity to pump out excess fluid and maintain clarity. Corneal specialists and general ophthalmologists continue to rely on accurate corneal pachymetry readings to manage patients with corneal ectasias (e.g., keratoglobus, pellucid degeneration, keratoconus), Fuchs’ endothelial dystrophy, bullous keratopathy, corneal rejection post – penetrating keratoplasty, and other causes of corneal edema. However, an increasing number of ophthalmologists are now obtaining CCT measurements on patients with (or suspected to have) glaucoma.
A variety of equipment are available for ophthalmologists to choose from. The most commonly used equipment uses ultrasound technology and is the clinical standard. Most of the clinical work studying the association between CCT and glaucoma has relied on ultrasound pachymetry. Ultrasound require contact with the cornea; the ophthalmologist delivers a drop of anesthetic to the eye and applies a sterile pachymeter tip gently onto the cornea. Ultrasounds continue to be popular, affordable and accurate, but a newer line of pachymeter that use optical low – coherence reflectometry technology may enhance accuracy and allow non – contact pachymetry. Studies comparing optical versus ultrasound pachymetry indicate that optical pachymetry is at least as accurate as ultrasound pachymetry when measuring CCT. Some optical instrument even allow real – time monitoring of measurements. Additional features that ophthalmologists may consider important when selecting the appropriate equipment, include portability, ability to communicate with office and surgical equipment (e.g. excimer laser), and built – in algorithms to estimate the “true IOP” from a CCT correction.
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