角膜輪部毛細血管に関する研究

第1報 健康者角膜輪部毛細血管像

抄録

The marginal capillary plexus of the cornea of 305 healthy persons was studied by a micro-photographic apparatus especially for capillaries of skin and mucous membrane. And the following results were obtained:
1. The width of arterial foot and venous foot of the majority of them ranged between 67 μ and 1115 μ respectively, the ratio between these twoups being 1: 2.
There was a tendency of the width narrowing with the persons over 60 years.
2. As for the width and length of capillary loop there was no difference as to the age, the former ranging between 3160 μ and the lattes, between 100150 μ with the majority of them.
3. The capillaries were straight seldom winding or zigzagging.
4. The dilatation of veins was found in 20.5% of them, those under 19 developing none. The dilatation increased with age, and it was found in 50.0% of those over 60 years. The fusiform and trangular dilatations were very characteristic to the marginal capillary plexus, their percentage being 5.2 and 3.3 respectively. Their appearance incrased with age.
5. The partial stricture and hemorrhage of artery were rarely found.
6. The intermittence of blood flow and the formation of granules in blood flow were found in 1020% of them respectively, the percentage of occurrence rising with age.
7. No hyperemia, congestion, and ischemia were found.
8. The cold weather narrowed the width of arterial and venous feet, reduced the length of capillary loop, stimulated the formation of granules, caused the intermittence of blood flow and reduced the speed of blood flow but it almost had nothing to do with the fusiform dilatation and triangular dilatations.