Anatomy and physiology of eyelash follicles: relevance to lash ablation procedures.
Ophthalmic Plast Reconstr Surg
; 13(1): 21-5, 1997 Mar.
Article
en En
| MEDLINE
| ID: mdl-9076779
BACKGROUND: This study aimed to define the anatomy of the eyelash follicles in order to improve methods of selective lash ablation. MATERIALS AND METHODS: Dimensions of eyelash follicles were determined from histological specimens of the upper and lower lids of 10 patients. For one of these patients, the eyelash follicles were categorized as quiescent or actively growing, according to standard hair-cycle morphology. RESULTS: Follicle dimensions were (mean +/- SD): upper lid follicle depth, 1.8 +/- 0.3 mm; bulb width, 188 +/- 44 microns; shaft width, 205 +/- 28 microns; lower lid follicle depth, 0.9 +/- 0.2 mm; bulb width 132 +/- 19 microns; and shaft width, 158 +/- 26 microns. The upper lid comprised 41% active follicles compared to 15% in the lower lid. CONCLUSIONS: There are significant differences in the anatomy of the follicles between the two lids. For an electrolysis needle to completely contact 95% of all follicles, it must be inserted 2.4 mm into the upper lid and 1.4 mm into the lower lid (mean depth +2 SD). Argon laser ablation requires a beam width of < 200 and < 250 microns for the lower and upper lids, respectively, to treated similar depths as electrolysis. The higher proportion of actively growing upper lid follicles explains why upper lid lashes are longer.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Folículo Piloso
/
Pestañas
Límite:
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Ophthalmic Plast Reconstr Surg
Asunto de la revista:
OFTALMOLOGIA
Año:
1997
Tipo del documento:
Article
País de afiliación:
Reino Unido
Pais de publicación:
Estados Unidos