Abstract
We demonstrate a system for measuring the ocular axial length (AL)
with high sensitivity and high speed using spectral-domain low-coherence
interferometry (SD-LCI). To address the limit in measuring such a large
range by using SD-LCI, we propose a full-range method to recognize the
positive and negative depths. The reference arm length is changed
synchronously with the shift of the focal point of the probing beam. The
system provides a composite depth range that is sufficient to cover the
whole eye. We demonstrate the performance of the presented system by
measuring the ALs of five volunteers. This system can provide the A-scan
ocular biometric assessment of the corneal thickness and AL in 0.1
s.
© 2018 Chinese Laser Press
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