Abstract
Purpose :
Aging, oculofacial pathology, and surgery can alter ocular adnexa morphology. Three-dimensional (3D) imaging can objectively quantify morphologic changes; however, commercial scanners are costly ($2000-25000) and bulky for clinic rooms. Therefore, we developed a low-cost (<$50 excluding the iPhone), compact 3D facial scanner system for easy use in the clinic setting to objectively track changes in oculofacial morphology.
Methods :
An iPhone 12 was secured to our 3D-printed turntable device which mounted onto a standard slit lamp and centered in front of the patient’s face. The turntable rotated the iPhone 360° around the face while the Scandy Pro iOS application employed the iPhone Face ID technology to create a 3D facial model. Variability between scans was calculated by measuring the difference between multiple scans of the same mannequin head. Then, repeat 3D scans were taken of a patient with a cicatricial ectropion of the right lower eyelid (before and after repair), a patient with Rosai-Dorfman disease (progression over 2 months), and a patient with acquired right eye anophthalmos (with and without conformer). Scans were analyzed using CloudCompare software. Scans took less than 1 minute.
Results :
Scanner variability was calculated to be 500μm. Using patient scans, morphologic changes over time were analyzed for the entire periocular region, which were clinically correlated. For the cicatricial repair patient the eyelid recessed 3.39mm. In the Rosai-Dorman patient the disease progression caused an elevation of 2.29mm. In the anophthalmic patient using a conformer elevated the ocular tissue 1.24mm.
Conclusions :
Our compact, user-friendly, and efficient 3D scanning device allowed for easy use in a busy clinical setting and without exposing patients to radiation. Scans allowed subjective clinical exams to be quantified with objective measurements.
This abstract was presented at the 2024 ARVO Annual Meeting, held in Seattle, WA, May 5-9, 2024.