Which tool is used to examine the sclera for ocular tumors?

The correct choice for examining the sclera for ocular tumors is the transilluminator. This tool is designed to provide a focused beam of light, which can illuminate the structures of the eye, including the sclera. By using a transilluminator, the technician can effectively identify any abnormalities or tumors by observing how the light interacts with the scleral tissue. The ability to see through the sclera with this tool helps in detecting any mass or irregularities that may indicate the presence of tumors.

While other tools like the slit lamp are valuable in eye examinations for assessing various conditions, they serve different purposes. The slit lamp provides a detailed view of the anterior segment of the eye and can also examine the sclera, albeit in a less direct manner than a transilluminator. Therefore, while useful, it is not the primary tool for identifying ocular tumors specifically on the sclera. A retinoscope primarily assesses refractive error and does not offer direct insight into the scleral structure. The pupil gauge is used for measuring pupil size and reaction, making it unrelated to the direct examination of the scleral tissue.