Elder M J
Moorfields Eye Hospital and Institute of Ophthalmology, London, England.
Ophthalmic Plast Reconstr Surg. 1997 Mar;13(1):21-5. doi: 10.1097/00002341-199703000-00004.
This study aimed to define the anatomy of the eyelash follicles in order to improve methods of selective lash ablation.
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.
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.
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.
本研究旨在明确睫毛毛囊的解剖结构，以改进选择性睫毛消融方法。
从10例患者上下眼睑的组织学标本中测定睫毛毛囊的尺寸。其中1例患者的睫毛毛囊根据标准毛发生长周期形态分为静止期或生长期。
毛囊尺寸（均值±标准差）为：上睑毛囊深度1.8±0.3mm；毛囊球宽度188±44μm；毛干宽度205±28μm；下睑毛囊深度0.9±0.2mm；毛囊球宽度132±19μm；毛干宽度158±26μm。上睑有41%的毛囊处于生长期，而下睑为15%。
上下眼睑毛囊的解剖结构存在显著差异。为使电解针完全接触95%的毛囊，在上睑需插入2.4mm，在下睑需插入1.4mm（平均深度+2标准差）。氩激光消融时，为达到与电解相似的深度，下睑和上睑所需光束宽度分别<200μm和<250μm。上睑生长期毛囊比例较高，这解释了上睑睫毛更长的原因。
