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Chuanqing Zhou, Shanhui Fan, Zhe Chen, Xinyu Chai; Accommodation induced variations of ocular axial length and retinal thickness measured with SD-OCT. Invest. Ophthalmol. Vis. Sci. 2013;54(15):4263.
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To measure and analyze the variations of the ocular axial length and retinal thickness during ocular accommodation by spectral domain optical coherence tomography (SD-OCT).
A custom-built dual channel SD-OCT was developed for measurement of the ocular axial length and retinal imaging. The scans were performed by the same experienced operator. All eyes were studied in the relaxed and 5D accommodated states. During the imaging, the subjects were asked to fixate on a Maltsecross visual target and to see it clearly. The thickness between ILM and RPE and its change caused by accommodation was calculated based on the acquired image.
Repeated measurements were taken in each accommodative state. Compared with relaxed state (0D), the mean thickness variation around the central fovea was 7.4957±8.3616 μm at 5D accommodation. In further study, we will collect more data to analyze the variations of axial length and retinal thickness.
Preliminary result showed that the thickness between ILM and RPE in macular has a slight change during accommodation.
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