**Core Concept**
Retinoblastoma and pseudoglioma are two distinct clinical entities that affect the retina, but they have different underlying pathologies. Retinoblastoma is a malignant tumor of the retina, while pseudoglioma refers to a condition where the retina appears to be infiltrated by tumor cells, but it is actually due to other causes.

**Why the Correct Answer is Right**
Retinoblastoma is characterized by the presence of malignant cells in the retina, which can lead to the formation of a mass or tumor. This is in contrast to pseudoglioma, where the retina appears to be infiltrated by tumor cells, but it is actually due to other causes such as retinopathy of prematurity, retinal detachment, or inflammatory conditions. The key difference between retinoblastoma and pseudoglioma lies in the histopathological examination, where retinoblastoma shows malignant cells with a characteristic nuclear morphology.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not provide a clear distinction between retinoblastoma and pseudoglioma. While both conditions affect the retina, they have different underlying pathologies.
**Option B:** This option is incorrect because it focuses on the clinical presentation of the two conditions, but it does not address the underlying pathology. A thorough understanding of the histopathological features is essential to differentiate between retinoblastoma and pseudoglioma.
**Option C:** This option is incorrect because it mentions the genetic predisposition to retinoblastoma, but it does not provide a clear distinction between retinoblastoma and pseudoglioma.

**Clinical Pearl / High-Yield Fact**
A key clinical pearl to remember is that retinoblastoma is a malignant tumor that requires prompt treatment, while pseudoglioma may be a manifestation of other underlying conditions that require a different treatment approach. A thorough ophthalmological examination and histopathological examination are essential to differentiate between these two conditions.

**Correct Answer:** A.