A superior and inferior orbital rim-based exophthalmometer (orbitometer)

Area of Science:

• Ophthalmology
• Medical Instrumentation

Background:

• Traditional exophthalmometry relies on the lateral orbital rim, which can be compromised during lateral orbitotomy, leading to inaccurate serial measurements.
• Accurate measurement of ocular prominence is crucial for diagnosing and monitoring various orbital conditions.

Purpose of the Study:

• To introduce a novel exophthalmometer (orbitometer) designed for improved accuracy in exophthalmometry, particularly in cases involving lateral orbitotomy.
• To describe an instrument that utilizes the superior and inferior orbital rims as a stable reference base.

Main Methods:

• The described orbitometer uses the superior and inferior orbital rim areas as its fixation base.
• The instrument features alignment capabilities at the midpupil, both horizontally and vertically, with a vertical fixation bar.
• A vertical bar gradient scale is incorporated for measuring hypoophthalmos and hyperophthalmos.

Main Results:

• The novel orbitometer provides a stable and reliable reference base using the superior and inferior orbital rims.
• Accurate serial exophthalmometry measurements are achievable even after lateral orbitotomy procedures.
• The instrument facilitates precise measurement of both reduced (hypoophthalmos) and increased (hyperophthalmos) eye protrusion.

Conclusions:

• The developed orbitometer offers a significant improvement over traditional exophthalmometers by providing a more stable and accurate measurement base.
• This instrument is particularly valuable for post-operative exophthalmometry following lateral orbitotomy.
• The design allows for precise quantification of ocular displacement, aiding in clinical diagnosis and management.