A Method of Dynamic Spatial Positioning of the Eyeball Based on Optic Disc Feature Following in Infants and Young Children

The dynamic spatial positioning of infants' eyes is crucial in ophthalmic retinal screening and medical imaging research. It plays an important role in the diagnosis of retinal diseases, the design of personalized treatment plans, and the monitoring of ophthalmic surgery. In order to solve the defects of existing eye tracking equipment and technology, such as complex implementation, sensitivity to environmental conditions, and limited long-term use, this study proposed a dynamic spatial positioning method of the eye based on the characteristics of the optic disc of infants. This method calibrates the size of the eye and retinal image through digital-analog linkage technology. It establishes a mapping relationship between pixels and physical sizes, and effectively solves the perspective distortion problem in retinal image acquisition, improving positioning accuracy and reliability. The centroid of the optic disc is selected as the reference point for spatial transformation, and the dynamic spatial changes of the eye are converted into changes in the centroid of the optic disc. Experimental results show that this method has good accuracy and robustness. The accuracy of dynamic spatial positioning of the eye is 0.0001 mm, and its average error is 0.000888 mm.