Applied Anatomy of the Lower Eyelid Preseptal Space for Treating Ectropion and Retraction with Soft-Tissue Fillers.

BACKGROUND: Lower eyelid malposition can result from age-related changes, such as ectropion, or postsurgical changes, such as retraction after lower lid blepharoplasty. The current accepted treatment is surgical, but soft-tissue fillers have been used as well, with good outcome. The underlying anatomy, which is incompletely described, would be useful information for practitioners desiring to provide minimally invasive injections of the lower eyelid. The authors describe a minimally invasive injection technique adjusted to the complex anatomy of the lower eyelid for the treatment of ectropion and retraction of the lower eyelid. METHODS: A total of 39 periorbital regions of 31 study participants were retrospectively analyzed using photographs before and after reconstruction of the lower eyelid with soft-tissue fillers. Two independent raters assessed the degree of ectropion and lower eyelid retraction (0 to 4, best to worst) before and after the reconstruction and the overall aesthetic improvement using the Periorbital Aesthetic Improvement Scale. RESULTS: The median degree of ectropion and lower eyelid retraction score improved statistically significantly from 3.00 (SD, 1.5) to 1.00 (SD, 1.0) ( P < 0.001). The mean volume of soft-tissue filler material applied per eyelid was 0.73 cc (SD, 0.5). The median Periorbital Aesthetic Improvement Scale score after the treatment was rated as 4.00 (SD, 0.5), indicating improvement of the periorbital functional and appearance. CONCLUSIONS: Anatomic knowledge of the lower eyelid and of the preseptal space is of clinical relevance when reconstructing the lower eyelid with soft-tissue fillers. The targeted space provides optimal lifting capacities for improved aesthetic and functional outcome. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.

Applicability of a sheep model for training in plastic surgery of eyelids and orbit.

OBJECTIVE: To test the applicability of a fresh tissue model for teaching facial plastic techniques and approaches to the eyelids and orbit. DESIGN: Observational animal experiments. SUBJECTS: Ten prepubescent sheep heads harvested following humane euthanasia at the completion of unrelated live animal research. METHODS: Young sheep were saline perfused at the end of an in vivo protocol. Head and neck tissues were harvested and refrigerated for 3-7 days. An experienced oculoplastic surgeon and an otolaryngologist explored the feasibility of common oculoplastic procedures in the ovine model. RESULTS: The model has potential for teaching basic principles in eyelid surgery including upper lid blepharoplasty, aponeurotic ptosis repair, upper lid gold weight lid loading for facial paralysis, lateral canthotomy and inferior limb cantholysis, lower lid tightening, and transconjunctival approach to the orbital floor. Eye muscle advancement, optic nerve sheath fenestration, and enucleation also accurately simulated human surgery. Anatomic variations limit the sheep model for orbital floor reconstruction and lacrimal drainage procedures. CONCLUSIONS: The sheep head and neck provide an inexpensive, safe model for developing skills in several oculoplastic procedures. Formal simulation testing is needed to confirm these expert opinions.