The Ziegler Knife Needle, size 1 with a 5mm blade, is made specifically for ophthalmic procedures requiring slightly larger incisions in the iris and corneal tissues. With precision in its sharp curved blade, excellent control, and less slippage from its square-shaped handle, it is the best choice for cataract surgeries and similar ophthalmic applications. The instrument is reusable and made of corrosion-resistant German stainless steel that is lightweight and easy to sterilize.