期刊
AMERICAN JOURNAL OF OPHTHALMOLOGY
卷 226, 期 -, 页码 108-116出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ajo.2021.02.001
关键词
-
资金
- Physician-Scientist Program of the Heidelberg University, Faculty of Medicine, Heidelberg, Germany
- Klaus Tschira Stiftung, Heidelberg, Germany
The study focused on quantifying in vitro straylight induced by localized opacification in intraocular lenses (IOLs) using anterior segment optical coherence tomography (OCT). It found a significant correlation between the amount of opacification and straylight, demonstrating the potential of OCT imaging in predicting the extent of visual impairment caused by IOL opacities.
PURPOSE: To quantify in vitro straylight induced by intraocular lens (IOL) localized opacification using an anterior segment optical coherence tomography (OCT) de-vice. DESIGN: Laboratory investigation. METHODS: We obtained high-resolution OCT cross-section images of 44 explanted IOLs using a new in vitro application for an anterior segment OCT device, the Anterion (Heidelberg Engineering, Heidelberg, Germany). In 24 cases, the reason for IOL explantation was a centrally localized opacification, the sequela of a secondary ocular surgery. As a control, we used 20 IOLs removed after an IOL (sub-)luxation. Using image analysis, we found a threshold area value representing a metric for the amount of opacification in a region of interest in the IOL's central optic. We used a modified C-Quant stray-light meter (Oculus, Wetzlar, Germany) to quantify light scattering. We derived a linear regression from calculating the correlation between the amount of opacification and straylight. RESULTS: We visualized different amounts of IOL opacification using the OCT device. The opacified lenses showed a mean threshold area of 6.7% +/- 3.3% and mean straylight was 95.1 +/- 75.6 deg(2)/sr. The clear group's mean threshold area was 2.0% +/- 0.8% and 5.0 +/- 3.4 deg(2)/sr mean straylight. Straylight correlated statistically significantly with the threshold area, with a correlation coefficient of R-2 = 0.80, P < .001. CONCLUSIONS: This high-resolution OCT imaging technique can be used to visualize IOL opacities. The amount of opacification correlated well with the stray-light induced by the lens. Anterior segment OCT imaging might be used in the future as a tool for predicting the extent of visual impairment and aid clinicians to quantify patients' complaints. (c) 2021 Elsevier Inc. All rights reserved.
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