Ophthalmic cannulas are slender, hollow tubes used in ophthalmic surgeries and procedures. They come in various sizes and designs, each suited for specific tasks within the eye. These instruments are crucial in ensuring precise and controlled delivery of fluids, medications, or removal of substances from the eye during surgery. Ophthalmic cannulas typically have a fine, needle-like tip that allows for delicate maneuvers without causing excessive trauma to the eye tissues. They are commonly made from materials like stainless steel or plastic, ensuring they are sterile and biocompatible.