Purpose: To compare the anterior chamber depth (ACD; corneal epithelium to lens) using 3 modalities and compare the change 1 day and 3 months postoperatively.
Setting: Private practice, Santa Monica, California, USA.
Design: Nonrandomized prospective series.
Methods: The mean optical pachymetry and immersion ultrasound (US) of the ACD and partial coherence interferometry (PCI) were measured. Optical pachymetry ACD was measured in 675 eyes postoperatively at 1 day and 3 months.
Results: The optical pachymetry ACD in 492 eyes was 3.17 mm ± 0.42 (SD); by immersion US, it was 2.99 ± 0.51 mm (0.18 mm deeper; P < .0001). In 178 eyes, the optical pachymetry ACD was 3.23 ± 0.45 mm; the PCI was 3.19 ± 0.48 mm (0.04 mm deeper), which was not statistically different (P > .05). In 675 eyes, optical pachymetry ACD preoperatively was 3.19 ± 0.40 mm. The postoperative 1-day optical pachymetry ACD was 4.35 ± 0.35 mm with a mean refractive error of -0.30 diopter (D); the final 3-month optical pachymetry ACD was 4.47 ± 0.31 mm, with a mean refractive error of -0.07 D (P < .0001). This is a mean intraocular lens (IOL) position shift of +0.12 mm posteriorly; the +0.23 D change represents a ratio of 1.92 D/mm of IOL axial movement.
Conclusions: The PCI ACD was comparable with optical pachymetry, but careful immersion US led to a 0.18 mm shorter ACD reading that cannot be corrected by sound velocity. The posterior capsule contracted and moved the IOL posteriorly 0.12 mm, resulting in 0.23 D hyperopic shift.
Financial Disclosure: Dr. Hoffer owns the registered trademark name "Hoffer(®)" and receives royalties for its commercial use from Alcon Laboratories, Inc., Appasamy Associates, Carl Zeiss Meditec AG, DGH Technology, Inc., Ellex iScience, Inc., Haag-Streit AG, Nidek Co., Ltd., Tomey Corp., Topcon Medical Systems, Inc., and Ziemer USA, Inc., as well as royalties from Slack, Inc. for the textbook IOL Power. Neither author has a financial or proprietary interest in any material or method mentioned.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jcrs.2015.10.010 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A Pilot Case Series on the Use of a Large Mushroom-Shaped Corneal Graft for the Surgical Management of Post-Penetrating Keratoplasty Ectasia and Endothelial Failure.
J Clin Med
January 2025
Eye Unit, Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, 25123 Brescia, Italy.
: The aim of this study was to evaluate the effect of a surgical technique for managing post-penetrating keratoplasty (PK) ectasia complicated by late endothelial failure (LEF). : A single-center pilot case series was conducted regarding consecutive patients affected by post-PK ectasia with late graft failure. Using a microkeratome, a single donor cornea was dissected to prepare a two-piece graft, comprising a larger anterior lamella made up of anterior stroma and a smaller posterior lamella made up of posterior stroma, Descemet's membrane, and endothelium.
View Article and Find Full Text PDFTopographical and Refractive Outcomes After Corneal Cross-linking in Novice Scleral Lens Users.
Eye Contact Lens
January 2025
Lewis Katz School of Medicine at Temple University (F.A.), Philadelphia, PA; and Wilmer Eye Institute (L.D.M., K.B., A.C.), Baltimore, MD.
Objective: To determine if scleral fittings that occur before corneal cross-linking (CXL) are still successful after the procedure.
Methods: This prospective study included seven patients with keratoconus or post-laser-assisted in situ keratomileusis (LASIK) corneal ectasia who were fitted with scleral lenses then underwent CXL. Four patients (six eyes) had keratoconus and three patients (five eyes) had post-LASIK ectasia.
Comparison of a Scheimpflug Camera and Optical Coherence Tomography in Evaluating Keratoconic Eyes Post Keratoplasty.
J Clin Med
January 2025
Department of Ophthalmology, St. Barbara Hospital, Trauma Centre, 41-200 Sosnowiec, Poland.
The aim of this retrospective study was to compare corneal parameters and compliance using a Pentacam HR-Scheimpflug (Pentacam HR) and a swept-source OCT Casia (Casia) in keratoconus (KC) patients post penetrating keratoplasty (PKP) and KC patients without PKP, as well as a control group. Pachymetry measurements were also analyzed using a spectral domain OCT Solix (OCT Solix), Pentacam HR, and Casia. The study included 71 patients (136 keratoconic eyes; group A), 86 eyes with KC post-PKP (group B), 50 eyes with KC without PKP (group C), and 52 control participants (104 eyes).
View Article and Find Full Text PDFPurpose: To investigate long-term corneal biomechanical changes in thin corneas after small incision lenticule extraction (SMILE).
Methods: Patients with indications for SMILE were enrolled in this study between November 2017 and March 2018. Patients were matched for age, spherical diopter, cylinder, spherical equivalent (SE), and lenticule thickness (LT), and then categorized into the thin cornea group (preoperative thinnest central corneal thickness [CCT] of 500 µm or less, 32 eyes) or normal cornea group (CCT of greater than 500 µm, 32 eyes).
Differentiation Between Pellucid-Like Keratoconus and Pellucid Marginal Degeneration Using Swept-Source Optical Coherence Tomography.
Cornea
November 2024
Department of Ophthalmology, University Hospital Carl Gustav Carus, TU Dresden, Dresden, Germany.
Purpose: The distinction between pellucid-like keratoconus (PLK) and pellucid marginal corneal degeneration (PMD) based on tomographic examinations is difficult. In this study, corneal tomographic and biomechanical parameters, after classifying PMD and PLK using swept-source optical coherence tomography, were analyzed.
Methods: Diagnoses of PLK and PMD were made using SS-OCT imaging, two groups were formed: PLK (n = 30) and PMD (n = 10).
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!