Question

A boy working on a hammer & chisel had a Foreing body entering eye. Detrimental investigation for this boy is

• A. X-ray
• B. B scan orbit
• C. CT Scan
• D. MRI

Answer 1

The Correct Option is A

When a boy working with a hammer and chisel experiences a foreign body entering the eye, it is crucial to select the proper imaging investigation to identify the foreign body's location and nature. However, certain imaging modalities can pose a risk in such situations.

MRI is detrimental in this case due to the presence of metallic foreign bodies. The powerful magnetic field in an MRI machine can cause movement of metallic objects, leading to potential injury or further complications. Therefore, an MRI is contraindicated for patients suspected of having metallic foreign bodies in the eye.

Instead, an X-ray is considered the initial investigation of choice as it can accurately detect metallic foreign bodies and is safe for this purpose. While CT scans and B scans can be used for further evaluation, particularly if the foreign body is non-metallic or if further detail is necessary, the immediate concern with metallic foreign bodies makes X-ray the safer and more suitable first-line option.

Investigation	Suitability
X-ray	Safe and effective for detecting metallic foreign bodies
B scan orbit	Useful for further evaluation, non-initial
CT Scan	Provides detailed imagery, non-initial
MRI	Detrimental with metallic foreign bodies—contraindicated

Thus, the detrimental investigation when dealing with a metallic foreign body in the eye is an MRI.