What is the name of the device that measures the position of the eye within the socket?

• A. Retinoscope
• B. Exophthalmometer
• C. Tonometer
• D. Ophthalmoscope

Answer: (B)

The device that measures the position of the eye within the socket is known as the exophthalmometer. This instrument is specifically designed to quantify the degree of proptosis or exophthalmos, which refers to an abnormal protrusion of the eyeball. The measurement is essential for diagnosing and monitoring conditions that affect the orbit, such as thyroid eye disease (Graves' disease), tumors, or other orbital pathologies.

By providing precise measurements of the anteroposterior position of the globe, the exophthalmometer helps healthcare providers assess changes in eye position over time, guiding treatment decisions and patient management strategies. The other devices listed, such as the retinoscope, tonometer, and ophthalmoscope, serve different functions related to vision examination and intraocular pressure measurement but do not directly measure the position of the eye within the socket.