Comparison of Central Corneal Thickness Measurement Using Ultrasonic Pachymetry, Rotating Scheimpflug Camera, and Scanning-Slit Topography

Central Corneal Thickness Measurements With Different Imaging Devices and Ultrasound Pachymetry

“…Furthermore, they found a narrow 95% LoA of 28.2 to 15.7 mm for CCT measurement between the 2 devices suggesting good agreement. Sedaghat et al, 5 in a study of 157 eyes, also found close agreement between Pentacam and UP. O9Donnell and Maldonado-Codina 21 reported good agreement and repeatability between Pentacam and UP.…”

“…Furthermore, patient comfort is reduced by the need for topical anesthesia and the risk of epithelial abrasion and corneal infection. 5 As such, noncontact measurements of CCT may be preferable so long as accurate measurements can be obtained.…”

Relationship between minimum corneal thickness and refractive state, keratometry, age, sex, and left or right eye in refractive surgery candidates

“…Today, a variety of well-tested techniques are available to determine the thinnest point in corneal thickness. 17,18 We used the Scheimpflug imaging technique because current studies analyzing different optical measurement techniques 17,19,20 found the Pentacam system to have the highest conformity in corneal thickness measurements with reference to gold standard ultrasound method, with the Pentacam system having the advantage of simultaneously measuring the thinnest point and CCT. However, many studies compared only the Orbscan slitlamp and Pentacam Scheimpflug rotating techniques with ultrasound pachymetry and did not refer to new, potentially better, techniques such as optical coherence tomography and very-high-frequency digital ultrasound.…”

Central Corneal Thickness Measurement in Sub-Saharan Africa: Review

“…However, the rotating Scheimpflug camera (Pentacam, Oculus, Inc., Wetzlar, Germany) is considered to be one of the most reliable devices that measures CCT values comparable to ultrasound corneal pachymetry instruments [19,20,21].…”