Teaching 3D reconstruction in ophthalmic imaging made easy

To demonstrate the value of using data visualisation in clinical practice and research education, I have created a very streamlined process for students to build 3D reconstructions of the optic nerve head ‘from scratch’. Students begin with an OCT volume scan containing 49 discrete images of the retina and optic nerve. Students are guided in class (or remotely) to segment the surface of the retina and optic nerve head’s profile using R scripting. The output is then exported to Blender 3D for texturing and rendering, creating a vibrant experience in interactive visualisation.

The 3D model is then viewed with and without binocular vision using a handheld stereo viewer.

Students quickly learn to appreciate that a 3D reconstruction provides more information than is provided by viewing discrete OCT images alone. This builds upon their foundation knowledge of Gestalt psychology learned in the vision science program through a practical application to optometry. Students also learn to appreciate that much of what we understand about the benefits of VR and AR can be achieved using conventional display technology even without the engagement of binocular vision. The experience is integrated with the report writing assessment task for OPTM3201.

Students enrolled in OPTM3201 build and view a 3D reconstruction of the optic nerve head.