Imaging: Clinical Science
- Ophthalmic Surgery, Lasers and Imaging
- May/June 2012 - Volume 43 · Issue 3: 214-221
BACKGROUND AND OBJECTIVE:
To examine the exact position of implanted Keraring (Mediphacos, Belo Horizonte, Brazil) segments by high-resolution anterior segment optical coherence tomography (AS-OCT).
PATIENTS AND METHODS:
This study included 17 eyes of 13 patients with keratoconus who underwent uneventful intracorneal ring segment implantation with the aid of femtosecond laser. Eyes were evaluated by AS-OCT at the third postoperative month. Distance from the apex of the triangular cross-section of the ring segment to the anterior corneal surface and distances from two basal corners to the posterior corneal surface were measured.
Distance from apex to anterior corneal surface (263.1 ± 42.9 μm) was significantly smaller than target depth calculated intraoperatively (356.9 ± 35.7 μm, P < .001). Distance between outer basal corner and posterior corneal surface was significantly greater than distance between inner basal corner and posterior corneal surface.
High-resolution AS-OCT is a rapid, convenient, and valuable technique in the follow-up of patients with implanted Keraring segments that may be helpful in predicting ring-related complications.
From the Department of Ophthalmology, Faculty of Medicine, Yeditepe University, Istanbul, Turkey.
Presented in part at the XXVII Congress of the European Society Cataract & Refractive Surgeons, September 12–16, 2009, Barcelona, Spain.
The authors have no financial or proprietary interest in the materials presented herein.
Address correspondence to Ebru Gorgun, MD, Yeditepe Universitesi, Oftalmoloji Bolumu, Sakir Kesebir Cad. Gazi Umur Pasa Sokak No:28, 34349 Balmumcu Besiktas, Istanbul, Turkey. E-mail: firstname.lastname@example.org
Received: January 18, 2011
Accepted: February 01, 2012
Posted Online: March 08, 2012