The posterior location of the dilator muscle induces anterior iris bowing during dilation, even in the absence of pupillary block.

Purpose: To examine the effect of the posterior location of the dilator on iris anterior curvature during dilation.

Methods: An in vivo human study, an ex vivo porcine experiment, and an in silico computational model were performed in parallel. Iris anterior curvature was measured in vivo before and after dilation by time-domain slit lamp optical coherence tomography (SL-OCT).

Swept-source polarization-sensitive optical coherence tomography based on polarization-maintaining fiber.

We present a swept-source polarization-sensitive optical coherence tomography system based on a polarization-maintaining fiber interferometer. The system produces reflectivity and birefringence information along a depth profile with a single sweep of the optical spectrum. Unlike single-mode fiber systems, retardance and relative optical axis orientation images are calculated without compensation.

Polarization-maintaining fiber based polarization-sensitive optical coherence tomography in spectral domain.

We demonstrate a polarization-sensitive spectral-domain optical coherence tomography system based on polarization-maintaining fiber technology. Using a single-line-scan camera, the system produces reflectivity and retardance information along a depth profile with a single measurement. The relative axis orientation is available as well.

Measurement of Faraday rotation using phase-sensitive low-coherence interferometry.

We report a differential phase sensor capable of measuring Faraday rotation in reflection mode with a single measurement and a small field-depth factor. Based on a polarization-maintaining-fiber low-coherence interferometer, the sensor measures phase difference between two decorrelated and oppositely polarized circular states incident on a sample. Sensitivity of the sensor for the Faraday rotation is 0.

Polarization-sensitive optical coherence tomography based on polarization-maintaining fibers and frequency multiplexing.

We report a novel polarization-maintaining fiber based optical coherence tomography for single detector imaging of tissue reflectivity and birefringence. A single depth scan yields quantitative birefringence information along the A-line accurately. Since the orthogonal polarization channels are frequency multiplexed, the polarization information is extracted by using digital band-pass filters.