Certified Ophthalmic Technician (COT) Test 2025 – 400 Free Practice Questions to Pass the Exam

A B-scan image represents two dimensions. In this imaging technique, also known as a B-scan ultrasound, two-dimensional cross-sectional images of the eye are produced. This method utilizes ultrasound waves to create a visual representation of the various structures within the eye, enabling the technician to visualize details such as the lens, vitreous, and retina in a plane perpendicular to the sound waves.

The grid of dots in the B-scan correlates to depth (the third dimension) but is displayed in a flattened two-dimensional view, allowing for assessment of anatomical features. The resultant image depicts depth (along one axis) and the lateral extent (along another axis), rendering a complete view while maintaining the intricacies of the structures involved.

In summary, the B-scan clearly illustrates features in two dimensions, facilitating the analysis of the internal anatomy of the eye, which is why the correct answer is that a B-scan image represents two dimensions.