‘Snow ball’ opacities near the ora-serrata are pathognomonic of:
**Core Concept**
The "snowball" opacities near the ora serrata refer to a characteristic appearance of vitreoretinal lesions in a specific condition. These lesions are associated with a particular ocular pathology where the vitreous humor and retina interact. The ora serrata is the serrated junction between the retina and the ciliary body.
**Why the Correct Answer is Right**
The correct answer is associated with a condition where the vitreous humor is attached to the retina, causing tractional forces that lead to the formation of "snowball" or "string of pearls" opacities. This condition is characterized by the accumulation of vitreous gel and retinal pigment epithelial cells, which form a distinctive appearance near the ora serrata. The pathophysiology involves the abnormal attachment of the vitreous to the retina, leading to traction and subsequent opacification.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the condition described is not related to a specific type of retinal detachment or a common ocular pathology such as retinal pigment epithelium (RPE) detachment.
* **Option B:** This option is incorrect because the condition described is not associated with a specific type of uveitis or a common ocular inflammatory condition.
* **Option C:** This option is incorrect because the condition described is not related to a specific type of retinal vascular disease or a common ocular condition such as diabetic retinopathy.
**Clinical Pearl / High-Yield Fact**
The "snowball" opacities near the ora serrata are a classic radiological finding in a specific condition, and their presence should prompt further investigation and evaluation to confirm the diagnosis.
**Correct Answer: C. Eale's disease.**