RT Journal Article
SR Electronic
T1 Evaluation of a new method for the measurement of corneal thickness in eye bank posterior corneal lenticules using Anterior Segment Optical Coherence Tomography
JF British Journal of Ophthalmology
JO Br J Ophthalmol
FD BMJ Publishing Group Ltd.
SP 580
OP 584
DO 10.1136/bjo.2010.190595
VO 95
IS 4
A1 Domenico Amato
A1 Marco Lombardo
A1 Francesco Oddone
A1 Mario Nubile
A1 Rossella A M Colabelli Gisoldi
A1 Carlo M Villani
A1 Sonia Yoo
A1 Jean-Marie Parel
A1 Augusto Pocobelli
YR 2011
UL http://bjo.bmj.com/content/95/4/580.abstract
AB Background/aims To preliminarily evaluate the repeatability of central corneal thickness (CCT) measurements performed with Anterior Segment Optical Coherence Tomography (AS-OCT) on eye bank posterior corneal lenticules.Methods Six donor lenticules were created with a 350 μm head microkeratome (Moria, Antony, France). All donor tissues were stored at 4°C in Eusol-C solution (Alchimia S.r.l, Ponte S. Nicolò, Italy), without the anterior cornea lamella. The CCT of each lenticule, maintained in the glass phial, was measured using a commercial AS-OCT instrument (Visante, Carl Zeiss Meditec, Dublin, California, USA) and a specially designed adaptor immediately and 4, 24 and 48 hours after dissection. Immediately after AS-OCT, CCT values were measured with the ultrasound pachymetry method used at the Eye Bank.Results The mean donor cornea central thickness was 647±36 μm and 660±38 μm (p=0.001) as measured by AS-OCT and ultrasound, respectively; immediately after dissection, CCT values of posterior lenticules were 235±43 μm and 248±44 μm, respectively (p=0.001). No statistically significant changes in CCT values of donor lenticules were assessed over the 48 h period with both methods. There was a high level of agreement, evidenced by Bland–Altman analysis, between the two methods of pachymetry.Conclusion AS-OCT, with the corneal tissue in the vial, was revealed to be a repeatable and reliable method for measuring posterior donor lenticule central thickness. Lenticule CCT values measured with the investigational AS-OCT method were on average 10 μm thinner than those measured with the established ultrasound method.