Anterior chamber depth measurement: interchangeability between Pentacam and other devices

We reviewed a series of recently published studies in which the anterior chamber depth (ACD) distance was measured by Pentacam or Pentacam HR and compared with other measuring devices. Since some published studies reach contradictory conclusions regarding device interchangeability and include di erent ocular conditions, for instance, phakic eyes, pseudophakic eyes, cataractous eye, and so on, this review was carried out to try to clarify which clinical devices can or cannot be considered as interchangeable with Pentacam or Pentacam HR for the measurement of ACD distance in clinical practice. J Emmetropia 2012; 3: 215-220 Nowadays, the measurement of anterior chamber depth (ACD) distance has become increasingly important in ophthalmic practice, for instance, in the planning of cataract1-5 and refractive1-9 surgery, calculation of phakic or pseudophakic IOL power and diameter4,5,10-14, screening for glaucoma risk factors2,3,14-16, and so on. Many papers focusing on device interchangeability for the measurement of ACD distance have been published. However, the studies published include di erent ocular conditions. For this reason, we decided to review all studies published in Medline before August 2012. e inclusion criterion was that the study had to evaluate device interchangeability between Pentacam or Pentacam HR and other devices that measure ACD distance. 1 Optometry Research Group (GIO), Department of Optics. University of Valencia. Spain. Financial disclosure: is research was supported in part by Research Grant #SAF2009-13342-E# awarded by the Ministry of Science and Innovation (Ministerio de Ciencia e Innovación) and by a BAF research scholarship (Generalitat Valenciana) awarded to Alberto Domínguez Vicent. e authors have no proprietary interest in any of the products or devices mentioned in this article. Corresponding Author: Alberto Domínguez Vicent. Department of Optics University of Valencia. C/ Dr. Moliner, 50 46100 Burjassot. Spain. Phone: +34 963544764 Fax: +34963544715 Email: [email protected] UPDATE/REVIEW e devices included in this review were Pentacam (Oculus, Wetzlar, Germany), Pentacam HR (Oculus, Wetzlar, Germany), A-Scan, Ultrasound Biomicroscopy (UBM), Orbscan (Bausch&Lomb Surgical Inc., San Dimas, California, USA), Orbscan II (Bausch&Lomb Surgical Inc., San Dimas, California, USA), Galilei (Ziemer, Switzerland), Visante OCT (Carl Zeiss Meditec Inc., Dublin, California, USA), IOLMaster (Carl Zeiss Meditec, Jena, Germany) and Lenstar LS 900/Biograph (Haag-Streit AG, Koeniz, Switzerland/ Alcon Laboratories Inc., Ft Worth, Texas, USA). In this context, the purpose of this paper was to clarify which devices are interchangeable with Pentacam or Pentacam HR in the measurement of ACD distances. We also included a brief description of the measurement principle used by the devices included in this review. MEASUREMENT PRINCIPLES