Optics & Refraction · NEET PG Preparation Ophthalmology
During an indirect ophthalmoscopy examination using a +20 D condensing lens, what is the nature of the final image formed to the observer?
Practice question from Optics & Refraction (NEET PG Preparation Ophthalmology), with the correct answer and a step-by-step solution.
hard · MCQ · Q-01DC1E
During an indirect ophthalmoscopy examination using a +20 D condensing lens, what is the nature of the final image formed to the observer?
- A.Virtual, erect, and magnified
- B.Real, inverted, and magnifiedCorrect answer
- C.Virtual, inverted, and diminished
- D.Real, erect, and diminished
Solution
In indirect ophthalmoscopy, the condensing lens forms a real, inverted aerial image of the retina between the lens and the examiner. The examiner then views this aerial image, seeing a virtual, erect, but overall optically inverted (upside down and reversed left-to-right) image of the fundus. However, the fundamental image produced by the condensing lens is real and inverted relative to the retinal object.
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