Fluorescein Angiography of the Anterior Segment

Fluorescein Angiography of the Anterior Segment

FLUORESCEIN ANGIOGRAPHY O F T H E ANTERIOR SEGMENT J. BRUUN-JENSEN, M.D. Aarhus, Denmark Following the description by Novotny and Alvis 1 of a simpl...

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FLUORESCEIN ANGIOGRAPHY O F T H E ANTERIOR SEGMENT J. BRUUN-JENSEN,

M.D.

Aarhus, Denmark Following the description by Novotny and Alvis 1 of a simple technique for serial fluorescein photography of the retina, many workers studied the pathology of the retinal From the Department of Ophthalmology, Kommunehospitalet, Aarhus University School of Medi­ cine. A grant from the Carl and Ellen Hertz Foun­ dation made this study possible.

vessels. There is, however, only one report on the use of this technique for examination of the anterior segment of the eye; Jensen and Lundbaek 2 used a Zeiss fundus camera with a special lens for fluorescein angiography of the iris. In order to benefit from the advantages the slitlamp offers in fluorescein angiog-

Fig. 1 (Bruun-Jensen). The Zeiss photo-slitlamp modified for fluorescein angiography. (1) Automatic recording unit. (2) Robot motor-camera. (3) Special holder for blue filter and concave lens. (4) Plastic tube in the air-cooling system. (5) Ignition unit engaged to high-speed flash generator. (6) Variable transformer. 842

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FLUORESCEIN ANGIOGRAPHY

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Fig. 2 (Bruun-Jensen). The iris of a normal 27-year-old woman 24 seconds after injection of fluorescein.

raphy, I made a number of modifications in a Zeiss photo-slitlamp. It was equipped with a Robot motor-camera and absorption filters and then attached to a high-speed flash gen­ erator. Changes (fig. 1) included: The lighting section. The original power supply and flash generator were dismantled. Removal from the lamphouse of the cap con­ taining the high-tension cable and the mounting screw made it possible to mount the ignition unit from the Zeiss fundus camera on the flash tube of the photo-slitlamp and to connect the high-speed flash genera­ tor. A variable transformer supplied power to the electric bulb. The flash tube was cooled by air-ducts in the lamp house and by use of a plastic tube

to connect an ordinary vacuum cleaner to the lamp-house. A blue filter (Schott B.G. 12/0.7 mm) in a specially designed holder to permit swing­ ing back and forth was placed, together with a concave lens, in front of the light aperature. The concave lens was used (—7.5 diop­ ters) because the lighting field was too small to photograph the entire iris. Photographing section. A division ring engaged the Robot motor-camera to the ob­ jective of the photo-slitlamp. To obtain suf­ ficient space for the camera, the double ocular of the microscope was turned horizontally 180 degrees. A special arm fastened to the anterior part of the microscope held the auto­ matic recording unit. Finally, an emission fil-

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Fig. 3 (Bruun-Jensen). The anterior chamber angle of a 57-year-old diabetic woman who had previously undergone cataract surgery. The picture was taken 18 seconds after injection of fluorescein.

ter (Schott G.G. 14/3 m m ) was placed in the division ring in front of the camera. Ilford H . P . 4 (36 exposures), the film regularly utilized, suffered about 2 5 % over­ development in Microphen ( I l f o r d ) . Immediately prior to photography, 5.0 ml of a 1 0 % solution of fluorescein natrium were injected into a superficial vein in the subject's forearm. F o r fluorescein angiography of the iris, a 60-degree light incidence was used to elimi­ nate undesirable light reflexes from the pu­ pillary a r e a ; simultaneously, it brought the iris structure into relief, thereby making possible better depth in the finished pictures. Figure 2 was made 24 seconds after fluores­ cein injection of a normal 27-year-old woman. A one-mirror Goldmann contact lens was used to examine the anterior chamber angle. A 57-year-old diabetic woman, previously undergoing cataract surgery, was the subject for Figure 3, made 18 seconds after fluores­ cein injection. The contact lens was also used to examine

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the ciliary processes by fluorescein photogra­ phy through the colobomas of the iris and iris dialyses. Figure 4, taken 14 minutes after fluorescein injection, shows the ciliary process of a 24-year-old man with a large traumatic iridodialysis. SUMMARY

A Zeiss photo-slitlamp was modified for fluorescein angiography of the anterior seg­ ment. Changes included an air-cooled lighting section together with absorption filters and a concave lens. A Robot motor-camera w a s used and light was directed to the iris at a 60-degree angle. T h e anterior chamber angle and the ciliary processes were photographed through a one-mirror Goldmann contact lens. Smedegade

6 (4200) Slagelse,

Denmark

REFERENCES

1. Novotny, H. R. and Alvis, D. L. : A method of photographing fluorescence in circulating blood in the human retina. Circulation 24:82, 1961. 2. Jensen, V. A. and Lundbaek, K. : Fluorescence angiography of the iris in recent and long-term di­ abetes. Diabetologica 4:161, 1968.

WTO

Fig. 4 (Bruun-Jensen). The ciliary process of a 24-year-old man with a traumatic iridodialysis, about 14 minutes after fluorescein injection.