Page:Plates illustrating the natural and morbid changes of the human eye.djvu/19

Rh easily through the cornea; it should retain the aqueous humour thoroughly while manipulating.

Fig. 5. "The iris scissors" Occasionally a pair is employed with only one point blunt, and the other sharp.

Fig. 6.

"The strabismus scissors." The blades should be strong and blunt-pointed.

Fig. 7. "The curved scissors" They should be blunt-pointed, strong, and bent on the flat.

Fig. 8. "The curette" (b) and "pricker" (a). The pricker, Fig. 8, a, is used for opening the capsule of the lens in the operation for cataract.

Fig. 9.

"The scoop" The scoop (a) (by some termed tractor) is the second of three different sizes which are in use in operations for cataract.

The body of the scoop is slightly concave from the stem towards the bent end, and still less concave from side to side. At the bent end it has an elevated edge, which forms an obtuse angle with the body. The scoop (b) is smaller, and has a more elevated edge than (a). It is used for the removal of small hard particles of cataract.

The scoop should be as thin as is compatible with use, and should be made of somewhat flexible material.

Fig. 10. (a) "The blunt iris-hook." and (b) "the spatula" Both are made of flexible material.

A sharp flexible hook, of equally short but less acute bend than the iris-hook, is used for removal of "opaque capsule" and of hard cataract.