Ocular Prosthesis Fabrication in Group II (Digital 3D-Printed Ocular Prosthesis)
CAD
SCLERA, CAD
In group II, a digitally designed 3D-printed ocular prosthesis was created. A Computerized Tomography (CT) scan image for the orbit was obtained, providing detailed information about the anophthalmic socket in a layered format. Digital Imaging and Communications in medicine (DICOM) data from the CT scan were imported into Materialise’s Interactive Medical Image Control System (MIMICS) software for the segmentation process. This process separates the soft tissue bed of the socket from the eyelids of the affected eye, revealing the fitting surface of the socket. This method replaces the conventional impression technique.The data was then imported into a 3-Matic software (Materialise 3-matic. CAD link module. Montreal, QC) to create a mid-sagittal plane. A mirrored image of the normal eyeball was used as a reference for the design and construction of the ocular prosthesis for the affected eye. Subtraction the mirrored normal eyeball from the defective eyeball was performed, resulting in the digitally designed ocular prosthesis.The STL was printed using medical-grade 3D-printed acrylic resin (Preform; Formlabs, USA) on a Formlabs, Form 2 printer (Formlabs, Somerville, USA). This printer operates based on SLA technology with a 405 nm laser wavelength and a layer thickness 50 μm. To ensure that finished parts are biocompatible we followed wash setting and post cure setting as noted in the Instructions for Use, prosthesis washed in 99% isopropyl alcohol for 10 min, then post cured for 60–90 min in 80 °C.The iris was printed using high-quality patient photographs through UV printing technology, utilizing a Roland Versa UV LEF-200 printer (Roland DG Corp., Japan). Subsequently, conventional sclera characterization was done performed, and layer of clear PMMA was added to cover the sclera, the ocular prosthesis was then finished, polished and delivered to the patient (Fig. 
3D-printed ocular prosthesis using medical grade 3D-printed acrylic resin (Preform; Formlabs, USA)