Which device would be used for precise measuring and marking in ophthalmic surgery?

In ophthalmic surgery, precise measuring and marking are crucial for accurate procedures, such as cataract surgery or corneal transplantation. Calipers are specifically designed to measure distances accurately and can be used to mark the eye for incision or other surgical landmarks. They allow for a high degree of precision, which is essential in delicate eye surgeries where even a small miscalculation can lead to significant complications.

Other tools like scissors, forceps, and needle holders serve different purposes. Scissors are primarily used for cutting tissues; forceps are used for grasping and holding tissues, and needle holders are designed for suturing tasks. While these instruments play vital roles in surgical procedures, they do not provide the measuring capabilities that calipers offer. Thus, calipers are the appropriate choice for precise measuring and marking in ophthalmic surgery.