Instrument for recording purkinje images

Abstract

Purkinje images are images generated by the reflection of light at different interfaces of the ocular reflective surfaces. The study of the Purkinje images is aimed to determine changes in the alignment of those surfaces. An optoelectronic system capable of generating and detecting Purkinje images in a patient is presented. A symmetric near-infrared illumination array is used to relate the position and orientation of the images obtained with misalignment in the optical axes of the eye. Besides, the images are processed to identify each of the Purkinje images using multi-thresholding.