Biomechanical study of cornea response under orthokeratology lens therapy: A finite element analysis.

Orthokeratology (OK) is becoming a mainstream modality for myopia correction and control, but its underlying mechanism is not yet fully understood. In this study, the biomechanical response of cornea under the OK lens was investigated to further understand the mechanism of OK therapy. Numerical models of the cornea and OK lens with different corneal refractive powers and myopia degrees were established to analyze features and differences of the spatial displacement and stress distribution in different areas of the anterior corneal surface by finite element method.

Stomach wall structure and vessels imaging by acoustic resolution photoacoustic microscopy.

Aim: To image stomach wall blood vessels and tissue, layer-by-layer.

Methods: We built up the acoustic resolution photoacoustic microscopy (AR-PAM) system for imaging layered tissues, such as the stomach wall. A tunable dye laser system was coupled to a fiber bundle.