2022
DOI: 10.1167/tvst.11.10.34
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Feasibility of Magnetic Levator Prosthesis Frame Customization Using Craniofacial Scans and 3-D Printing

Abstract: Purpose To determine the feasibility of a custom frame generation approach for nonsurgical management of severe blepharoptosis with the magnetic levator prosthesis (MLP). Methods Participants (n = 8) with severe blepharoptosis (obscuring the visual axis) in one or both eyes who had previously been using a non-custom MLP had a craniofacial scan with a smartphone app to generate a custom MLP frame. A magnetic adhesive was attached to the affected eyelid. The custom MLP fr… Show more

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Cited by 5 publications
(8 citation statements)
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“…One possible measure to enhance stability involves the utilization of patient-specific custom three-dimensional printed frames, a strategy previously employed for standard MLP designs with success. 20 Considering the patient's anatomy, support points can be preferentially placed near the frame magnet, increasing stability. Additional support structures can be incorporated while ensuring comfort.…”
Section: Resultsmentioning
confidence: 99%
“…One possible measure to enhance stability involves the utilization of patient-specific custom three-dimensional printed frames, a strategy previously employed for standard MLP designs with success. 20 Considering the patient's anatomy, support points can be preferentially placed near the frame magnet, increasing stability. Additional support structures can be incorporated while ensuring comfort.…”
Section: Resultsmentioning
confidence: 99%
“…Substantial force changes occur with frame movements as small as 1mm, therefore a more stable frame is paramount. This can be accomplished using custom designed 3D printed spectacle frames, specifically designed for the individual user, as reported previously in a recent phase I study (Houston and Paschalis 2022).…”
Section: Discussionmentioning
confidence: 99%
“…In our experience, surgical treatment is frequently denied to these orphan disease patient groups because of the characteristic daily or even hourly variability of blepharoptosis severity and needs for repeated surgery over a lifetime. Safety and efficacy data for these populations exist from our ongoing 4 and prior clinical trials, 5,6 although these represent subpopulations of our clinical trial study sample, which is already small. This is a well-known problem for rare disease studies and may be addressed by n-of-1 trial analysis methods of repeated measures over time and blinded crossovers 17 .…”
Section: Discussionmentioning
confidence: 99%
“…With force properly titrated, the facial muscles of eye closure (orbicularis oculi) can easily overcome the attractive force to allow comfortable blinking without any power supply, making a relatively lightweight and inexpensive device. In two prior open-label studies (combined n = 20), there was an 80% in-office fitting success with median comfort rating of 8.5 of 10 and no serious adverse events during 1 week or more of use 5,6 …”
mentioning
confidence: 94%
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