Fine structure of the retinal epithelium and retinal tapetum lucidum of the goldeye Hiodon alosoides

1982 ◽  
Vol 164 (2) ◽  
pp. 287-302 ◽  
Author(s):  
Charlie R. Braekevelt
Keyword(s):  
Fine Structure ◽  
Tapetum Lucidum ◽  
Retinal Epithelium ◽  
Retinal Tapetum

Retinal Tapetum Lucidum: A Novel Reflecting System in the Eye of Teleosts

Science ◽  
1970 ◽  
Vol 169 (3944) ◽  
pp. 478-480 ◽  
Author(s):  
H. J. Arnott ◽  
N. J. Maciolek ◽  
J. A. C. Nicol
Keyword(s):  
Tapetum Lucidum ◽  
Retinal Tapetum

The choroidal tapetum lucidum of Latimeria chalumnae

1974 ◽  
Vol 186 (1084) ◽  
pp. 281-290 ◽  
Keyword(s):  
Electron Microscopy ◽  
Large Angle ◽  
Optic Axis ◽  
Crystal Plane ◽  
Constructive Interference ◽  
Latimeria Chalumnae ◽  
Tapetum Lucidum ◽  
Retinal Epithelium ◽  
Hexagonal Crystals ◽  
Scanning Electron

The choroidal tapetum of Latimeria chalumnae has been examined by optical, and by transmission and scanning electron microscopy. The retinal epithelium, which contains no pigment, is separated from the tapetum by Bruch’s membrane and the well-developed choriocapillaris. The tapetum itself consists of cells containing stacks of flat hexagonal crystals, shown by paper chromatography to be guanine. The crystals are arranged parallel within each cell; most are also parallel to those in neighbouring cells, though the crystals in some cells make a large angle with the general crystal plane. In the main the crystals lie so that their plane is approximately perpendicular to the optic axis of the eye. Owing to the retinal curvature, the angle of the crystal plane varies with position in the eye. The conditions for reflexion by constructive interference are fulfilled. Few choroidal melanocytes lie among the cells of the tapetum, which is not occlusible.

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