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Subjects/ENT/ENT

ENT

medium

ear ENT

Which focal length in the objective piece of microscope is commonly used for ear surgery?

A. 100mm

B. 250 mm

C. 450mm

D. 950 mm

Explanation

Focal length of objective lens: For ear surgery - 200 mm/ 250 mm For Nose / Paranasal sinus surgery - 300 mn For Laryngeal surgery-400 mn

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