Area of fundus seen with direct ophthalmoscope is
**Core Concept**
The **direct ophthalmoscope** is an instrument used for viewing the **fundus** of the eye, allowing examination of the **retina**, **macula**, and **optic disc**. It provides a highly magnified view but has a narrow field of view. The area of the fundus seen with a direct ophthalmoscope is limited due to its design and the optical properties of the eye.
**Why the Correct Answer is Right**
The correct answer choice is related to the **field of view** provided by the direct ophthalmoscope, which is approximately **10 degrees**. This limited field of view restricts the area of the fundus that can be examined at any given time, requiring the examiner to move the ophthalmoscope to view different parts of the retina.
**Why Each Wrong Option is Incorrect**
**Option A:** This choice is incorrect because the field of view is not as wide as implied.
**Option B:** Similarly, this option overestimates the field of view.
**Option D:** This option also does not accurately represent the field of view of a direct ophthalmoscope.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that the direct ophthalmoscope provides high magnification but has a narrow field of view, making it ideal for detailed examination of specific areas like the macula and optic disc but less suitable for viewing the peripheral retina.
**Correct Answer:** Correct Answer: B. 10 degrees.