Cornea Orientation Detection Using Polarized Light Imaging

The patent introduces polarized light as an intermediary medium to interact with the corneal tissue. The polarized light serves as a mediator that reveals the orientation of corneal lamellae through polarization changes, enabling precise orientation measurement without directly observing the tissue structure. This resolves the contradiction by adding a measurement dimension (polarization orientation) that traditional examination methods cannot provide.

The patent changes the measurement parameter from simple light transmission (transparency) to polarized light transmission (polarization orientation). By introducing the polarization parameter, the system can determine the orientation of corneal structures. This parameter change enables precise orientation determination while maintaining relatively simple device complexity, as it builds upon traditional ophthalmic examination equipment by adding polarization capabilities.

The patent designs the optical assembly to perform multiple functions: traditional light illumination for transparency assessment and polarized light illumination for orientation determination. The image acquisition device similarly captures both types of information. This multi-functionality reduces the need for separate specialized devices, thereby limiting the increase in device complexity while achieving precise orientation measurement.

The patent merges the polarization detection capability with the existing image acquisition system. Instead of using separate polarization measurement devices, the system combines polarization filtering and image capture into a unified optical path. This merging approach enables orientation determination while minimizing additional device complexity by integrating functions rather than adding independent systems.

The patent performs orientation determination of the donor corneal flap before grafting onto the recipient bed. By determining the orientation in advance using polarized light imaging, the surgeon can plan the optimal alignment strategy. This preliminary action ensures that the subsequent grafting procedure achieves optimal optical interaction, improving visual outcome reliability without significantly impacting surgical efficiency, as the orientation information is obtained quickly through non-invasive imaging.

The patent provides real-time feedback on the orientation of corneal structures during the surgical procedure. The image acquisition device captures polarization information that immediately indicates whether the donor and recipient tissues are properly aligned. This feedback mechanism allows the surgeon to adjust the grafting orientation during the procedure, ensuring optimal optical interaction while maintaining surgical efficiency through guided decision-making.