Axial Scaling Is Independent of Ocular Magnification in OCT Images
We read with great interest the article by Röck et al., 1 as it is a well-known physical principle of optical coherence tomography (OCT) and its basis, low-coherence interferometry, that magnification of the image of the sample using an objective lens or eyes with varying refractive power applies only in the transverse dimension, 2 not the axial dimension. 3 In this article, the authors collected OCT scans of a subretinal implant of known thickness, but found a significant correlation between observed thickness of the implant and the subjects' axial length. Regrettably, the authors made no mention of the surprising ...
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