Abstract
We have combined an anterior segment (AS) optical coherence tomography (OCT) system and a wavefront-based aberrometer with an approach that senses ocular wavefront aberrations using the OCT beam. Temporal interlacing of the OCT and aberrometer channels allows for OCT images and refractive error measurements to be acquired continuously and in real-time. The system measures refractive error with accuracy and precision comparable to that of clinical autorefractors. The proposed approach provides a compact modular design that is suitable for integrating OCT and wavefront-based autorefraction within the optical head of the ophthalmic surgical microscope for guiding cataract surgery or table-top devices for simultaneous autorefraction and ocular biometry.
Highlights
Intraoperative wavefront aberrometry and intraoperative optical coherence tomography (OCT) are emerging as guidance tools for ocular surgeries
As a preliminary step toward the development of an intraoperative system combining these modalities, we demonstrated the proof of principle of combined anterior segment (AS)-OCT imaging and Shack-Hartmann wavefront sensing using a single shared beam
We propose a new approach that uses a single beam with fixed geometry to perform both AS-OCT imaging and wavefront sensing
Summary
Intraoperative wavefront aberrometry and intraoperative OCT are emerging as guidance tools for ocular surgeries. Intraoperative aberrometry provides refractive error measurements in real-time during cataract surgery [1,2,3,4]. This technology allows cataract surgeons to confirm intraocular lens (IOL) power choice while the patient remains on the operating table, and to ensure proper alignment of toric IOLs. On the other hand, intraoperative OCT (iOCT) [5,6,7,8,9,10,11,12,13,14,15,16] enables cross-sectional and volumetric visualization of surgical manipulations in real time with high resolution. IOCT enables verification of the integrity of the anterior segment prior to performing autorefraction to assure reliability of refractive measurements during surgery [22]
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