Norn M
Acta Ophthalmol (Copenh). 1987 Apr;65(2):137-42. doi: 10.1111/j.1755-3768.1987.tb06991.x.
The lower lids of 274 normal subjects have been examined in the slit-lamp for expressibility of secretion from the Meibomian glands. Secretion could be expressed from on an average 10 glands (median 11), dependent on age, decreasing with increasing age (from 14.5 glands at about the age of 20 to 7 glands above the age of 80). The expressibility was seen to be positively correlated to the thickness of the lipid layer of the precorneal film, estimated by the semiquantitative interference method. It was positively correlated to pigmentation and to ordinary greasy scales on the lid margin. The expressibility negatively correlated to retraction of the Meibomian orifices. The expressibility was found not to be correlated to elevated orifices, foam formation in the external part of the eye, cysts in the tarsus, nor with casts round the eyelashes. It is important to distinguish between cylindric casts (Demodex-induced) and ordinary greasy scales on eye lashes and lid margin.
在裂隙灯下检查了274名正常受试者的下眼睑，以观察睑板腺分泌物的可挤出性。平均可从约10个腺体挤出分泌物（中位数为11个），这取决于年龄，随着年龄增长而减少（20岁左右时为14.5个腺体，80岁以上时为7个腺体）。通过半定量干涉法估计，可挤出性与角膜前膜脂质层的厚度呈正相关。它与睑缘色素沉着和普通油腻鳞屑呈正相关。可挤出性与睑板腺开口退缩呈负相关。发现可挤出性与开口抬高、眼外部泡沫形成、睑板囊肿以及睫毛周围的痂皮均无相关性。区分睫毛和睑缘的圆柱状痂皮（蠕形螨引起）和普通油腻鳞屑很重要。
