Posters
Corneal densitometry and higher order aberrations after Bowman layer transplantation: 1 year results
Poster Details
First Author: J. Parker NETHERLANDS
Co Author(s): S. Luceri I. Dapena L. Baydoun S. Oellerich K. van Dijk G. Melles
Abstract Details
Purpose:
To evaluate corneal densitometry and higher order aberrations up to 1 year after Bowman layer (BL) transplantation.
Setting:
Netherlands Institute for Innovative Ocular Surgery / Tertiary referral center.
Methods:
Retrospective study at a tertiary referral center. Fifteen eyes of 14 patients who underwent BL transplantation for advanced keratoconus and had at least 1 year of follow-up were examined before BL transplantation and postoperatively at 1 day, 1 week, and 1, 3, 6, 12 months. Corrected distance visual acuity (CDVA) with spectacle and contact lenses, anterior and posterior higher order aberrations (HOAs) and corneal densitometry were analyzed.
Results:
One year postoperatively, average LogMAR spectacle CDVA changed from 1.35 (±0.46) preoperatively to 0.96 (±0.32, P<.001), while average LogMAR contact lens CDVA remained stable (P=.126). Anterior and posterior HOA root mean square decreased from 3.08±0.59 µm to 2.67±0.71 µm and 7.32±2.20 µm to 6.30±2.18 µm, respectively (P<.05). Spherical aberration (Z40) improved on the anterior and posterior surface (P<.001). After 1 year, backscattering values increased, mostly in the central and posterior layers, with a peak at one month after surgery (P<.005 in zones 2-6 and 6-10 mm). No correlation between HOAs or corneal backscatter and CDVA was found.
Conclusions:
Corneal HOAs, especially spherical aberration, decreased for both the anterior and posterior corneal surface after BL transplantation while corneal backscattering increased, mostly in the central and posterior layers, where the graft had been placed. Changes in HOAs and corneal backscattering did not relate with CDVA.
Financial Disclosure:
One or more of the authors receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented
