Comparing Anterior Segment Ocular Coherence Tomography (AS-OCT), Ultrasound Biomicroscopy (UBM) and Pentacam in Evaluating the Changes of the Anterior Segment Parameters after Phacoemulsification Ahmed Ghoneim 1* , Tamer Wasfy 1 , Yasser Serag 1 , Hazem Elbedewy 1 , Elsayed Nassar 1 , Ahmed Elmaria 1 Saed AM 2 and Tamer Salem 2 1 Department of Ophthalmology, Faculty of Medicine, Tanta University, Egypt 2 Department of Ophthalmology, Faculty of Medicine, Benha University, Egypt * Corresponding author: Ahmed Mohamed Ghoneim, Department of Ophthalmology, Faculty of Medicine, Tanta University, Egypt, Tel: +201005454062; E-mail: ghoneimfjmm@yahoo.com Received date: April 18, 2017; Accepted date: May 03, 2017; Published date: May 08, 2017 Copyright: ©2017 Ghoneim A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Abstract Background: Cataract extraction affects some of the anterior chamber (AC) parameters like AC depth (ACD) and the width of the AC angle. Different techniques are used to evaluate these effects before and after cataract extraction. Purpose: To evaluate the results of Anterior Segment Optical Coherence Tomography (AS-OCT), Ultrasound Biomicroscopy (UBM) & Pentacam in evaluating the changes of the anterior segment parameters after cataract extraction. Methods: Prospective non-randomized study including 40 cataractous eyes. AS-OCT, UBM and Pentacam were done 1 week before, 1 week and 1 month after phacoemulsification with intraocular lens (IOL) implantation, to measure ACD, AC angle width, and central corneal thickness (CCT). Results: ACD depth, AC angle width and CCT increased significantly 1 week and 1 month after surgery than the preoperative level (p<0.001), with no significant difference between 1 week and 1 month after surgery (p>0.05). No significant difference between the 3 techniques in most measures either pre- or postoperatively. Conclusion: ACD, AC angle width and CCT are significantly increased after uneventful phacoemulsification surgery and Foldable IOL implantation, which have become stabilized after 1 month of surgery with no significant difference in the measures given by AS-OCT, UBM or Pentacam. Keywords: Anterior segment OCT; UBM; Pentacam; Phacoemulsifcation; AC Angle; Corneal thickness Introduction Cataract and various lens disorders are well known to cause changes in the anterior chamber of the eye, especially the angle and afecting the intraocular pressure. One of these efects is the narrowing of the angle which may sometimes proceed to angle closure either in acute, subacute or chronic forms [1,2]. Tis happens because of the equatorial age-related growth of the lens which makes the suspensory ligament slackens and the lens moves anteriorly [3]. Phacoemulsifcation for cataract or even lens extraction with IOL implantation in eyes with narrow angle can reduce the intraocular pressure (IOP), open the iridocorneal angles and deepen the anterior chamber [3-10]. In the traditional clinical settings, direct visualization of the iridocorneal angle can be done by some diagnostic contact lenses; such as the Goldmann 3-mirror lens. Te evolution of some new investigations for the anterior segment of the eye like anterior segment optical coherence tomography (AS-OCT), ultrasound biomicroscopy and pentacam, makes it possible to objectively evaluate the structures of anterior segment of the eye, the iridocorneal angle now can be objectively fully investigated and well-assessed [12,13]. AS-OCT acts through using light of long wavelength (1,310 nm) which gives images of high resolution for the anterior segment of the eye in a non-invasive and non-contact way. It is a rapid technique and provides quantitative analysis of diferent ocular structures. It also has repeatability and reproducibility because of its low intraobserver and interobserver variability [14-17]. Te limitation of AS-OCT technique is its limited penetration of the iris due to the presence of pigmented epithelium. Tis limitation makes the obtaining of accurate images for structures behind this pigmented epithelium (ciliary body, lens and zonules) are difcult [15]. Ultrasound biomicroscopy (UBM) can give images of high- resolution and good quality for anterior segment including iridocorneal angle and ciliary body which are not visible with ordinary gonioscopy [14,16,18]. Te major disadvantage of the UBM technique is that the transducer requires immersion of the eye in a water bath of saline with the patient in the supine position. Tis makes the procedure uncomfortable for the patients and needs a skilled examiner, the Scheimpfug camera (Pentacam), which uses a slit beam and a camera, is a non-invasive technique and can be repeated easily but it Ghoneim et al., J Clin Exp Ophthalmol 2017, 8:3 DOI: 10.4172/2155-9570.1000652 Research Article Open Access J Clin Exp Ophthalmol, an open access journal ISSN:2155-9570 Volume 8 • Issue 3 • 1000652 Journal of Clinical & Experimental Ophthalmology J o ur n a l o f C l i n ic a l & E x pe r i m e n t a l O p h t h a l m o lo g y ISSN: 2155-9570