An ophthalmoscope is a special device used by eye specialists. This tool has a concave mirror that has a hole in the middle. The doctor looks through the patient’s retina, so that he can find the condition of the eyes. This ENT instrument has a light source, and this light is reflected through the mirror.
Answer:
concave mirror
Explanation:
the doctor focuses through the small hole from behind the concave mirror while a light beam is directed into the pupil of patients eye.
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