EYE RESEARCH APPLICATIONS 



Fig. 3. Limbal region of human eye (X32). C — Cornea showing superficial vascular arcade. SC — 

 Schlemm's canal. S — Sclera showing deep and superficial vascular arcade. (From — Pattee, Garron, 

 McEwen, Feenej^ — Steromicroradiography of the Limbal Region of the Human Ej-e. X-Ray Microscopy 

 and Microradiography. Academic Press, N. Y., 1957. Eds. Cosslett, Engstrom and Pattee.) 



AEG-50 tube with vanadium target and a 

 beryllium window. The tube was operated 

 at 12.5 KV at a distance of 100 cm and the 

 path was filled with helium. Both Lippman 

 film (Gevaert) and type 649 spectroscopic 

 plate (Eastman) were used. Exposure time 

 was about one hour. Stereo images were pro- 

 duced by tilting the specimen and photo- 

 graphic plate 15° with linear translation. An 

 example of the results achieved by this 

 method is given in Fig. 3. It is apparent 

 that good visualization of channels has been 

 obtained. The location in depth of the vas- 

 cular network is obtained by viewing the 

 photographs steroscopically. 



The results of both Francois et at. (6) and 

 Pattee et al. (7) are in essential agreement 

 that holes exist between the anterior cham- 

 ber and Schlemm's canal and the episcleral 



vessels show many anastomoses and interest- 

 ing vascular patterns. 



REFERENCES 



1. Barclay, Alfred, "Micro-arteriography," 



Charles C Thomas, Springfield, 111., 195L 



2. Bellman, S., "Microangiographj-," Acta 



Radiol. Suppl. 102 (1953). 



3. Francois, J., Neetens, A., and Collette, 



J. M., "Microangiographie oculaire," Oiph- 

 thalmologica. 129, 145-159 (1955). 



4. Francois, J., Neetens, A., and Collette, 



J. M., "Vascular supplj' of the optic path- 

 way.' II. Further studies by micro-arteriog- 

 raphj^ of the optic nerve," Brit. J. Ophthal., 

 39, 220-232 (1955). 



5. Wybar, K. C, "Vascular anatomy of the 



choroid in relation to selective localization of 

 ocular disease," Brit. J. Ophthal., 38, 513-527 

 (1954). 



6. FRANgois, J., Collette, J. M., and Neetens, 



A., "Etude microradiographique de la parol 

 interne du canal de Schlemm," J. Belg. de 

 Radiol, 38, 1-15 (1955). 



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