Houston KE, Tomasi M, Yoon M, Paschalis EI. A Prototype External Magnetic Eyelid Device for Blepharoptosis.
Transl Vis Sci Technol 2014;
3:9. [PMID:
25674358 DOI:
10.1167/tvst.3.6.9]
[Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Accepted: 10/09/2014] [Indexed: 11/24/2022] Open
Abstract
PURPOSE
To test a prototype magnet system (magnetic levator prosthesis) for the ability to comfortably and non-invasively provide eye opening with maintenance of the blink in people with paralytic ptosis and determine preliminary efficacy for short-term clinical application.
METHODS
The prototype device consisted of a magnet on a spectacle frame and a micro-magnet array mounted externally on the eyelid. Participants with unilateral CN III palsy (n=3) trialed the predicate (ptosis crutch) and magnet device. Video analysis was used to quantify changes in eyelid opening and subjective responses were documented with a rating scale. A 20-minute and then a 1-week trial were offered.
RESULTS
The magnetic levator prosthesis device was effective to provide eye opening while allowing, at minimum, a volitional blink without ill effects on the eyelid skin or ocular surface. Comfort scores ranged from 6 to 9 out of 10 over 3 evaluations. All patients chose an extended trial of the magnet device and reported continued 8-9/10 comfort and efficacy after the extended 1-week trial.
CONCLUSIONS
Comfortable and effective restoration of eye opening with maintenance of the blink is feasible using external static magnets and warrants further study.
TRANSLATIONAL RELEVANCE
This is the first careful documentation of the successful use of an externally mounted static magnet system to treat paralytic ptosis.
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