THE uses of air in ophthalmology are for the most part limited to the mechanical displacement of tissues. The use of air in various procedures has become more prevalent during recent years.
Employing a technic similar to that originally described by Gasteiger and Grauer1 in 1929, and also discussed by Spackman2 in 1932, in which they injected air into the fascia bulbi (Tenon's capsule) immediately next to the sclera, Pfeiffer3 has found the procedure useful in determining whether a foreign body is deep in the eye or just behind it. The air is injected into the potential space between the fascia bulbi and the sclera, and then roentgenograms are taken to show the exact location of the sclera in relation to any opaque foreign body or other radiopaque substance or structure. A summary of his technic follows :With the eye anesthetized with several drops of tetracaine
HUGHES WL, COLE JG. TECHNICAL USES OF AIR IN OPHTHALMOLOGY. Arch Ophthalmol. 1946;35(5):525–540. doi:10.1001/archopht.1946.00890200536006