Figure 8.

Examples of microcapillary needles that are not suitable for surgery

(A) An example of unpolished needle. Needle tip is clipped by forceps, but it is not grinded. This needle is hard to penetrate sclera and can damage eyeballs.

(B) An example of partially grinded needle. Only the one side of the needle tip is grinded. This needle is hard to load an implant.

(C) An example of not sharp enough needle. This needle may cause unnecessary damage on the eyeball as it requires more force to penetrate sclera.

(D) An example of contaminated needle. The needle tip may be sharp enough, yet several debris (contaminants) inside the needle may induce inflammation and interfere in proper loading of an implant.