All are true regarding direct ophthalmoscopy except: March 2008
## Core Concept
Direct ophthalmoscopy is a technique used to examine the interior of the eye, particularly the **retina** and **optic disc**. It involves using a **handheld ophthalmoscope** to shine a light through the pupil and view the structures at the back of the eye. This method provides a **magnified** but **inverted image** of the retina.
## Why the Correct Answer is Right
The correct answer, , implies that one of the statements provided about direct ophthalmoscopy is false. Typically, direct ophthalmoscopy provides a **highly magnified** view of the retina but with a limited **field of view**. It is excellent for detailed examination of the **optic disc**, **macula**, and **peripapillary retina**. The technique does not require **mydriasis** (pupil dilation) for a thorough examination, making it convenient for quick assessments.
## Why Each Wrong Option is Incorrect
- **Option A:** If a statement claims direct ophthalmoscopy provides a wide field of view, it would be incorrect because direct ophthalmoscopy is known for its **limited field of view** but high magnification.
- **Option B:** If a statement suggests direct ophthalmoscopy requires mydriasis, it would be incorrect because, while mydriasis can be helpful, it is not strictly required for direct ophthalmoscopy.
- **Option C:** If a statement mentions that direct ophthalmoscopy provides an **inverted image**, this would actually be correct, as the image seen is indeed inverted.
- **Option D:** Without specific details on each option, we infer based on common facts about direct ophthalmoscopy.
## Clinical Pearl / High-Yield Fact
A key point to remember is that direct ophthalmoscopy offers a **highly magnified** view of the retina, making it ideal for examining details of the **optic nerve head** and **macula**. However, for a broader view of the retina, **indirect ophthalmoscopy** might be preferred.
## Correct Answer: D.