**Core Concept**
Allergic conjunctivitis is a type of eye inflammation caused by an allergic reaction to environmental allergens such as pollen, dust, or pet dander. It is characterized by the release of histamine and other chemical mediators from mast cells, leading to symptoms like itching, redness, and increased tearing.

**Why the Correct Answer is Right**
The correct answer, **Option D**, is incorrect because allergic conjunctivitis typically follows a seasonal pattern, with symptoms worsening during peak pollen seasons. This is because the allergen load in the environment is higher during these periods, triggering a more pronounced allergic response. In contrast, other options like itching, papillary hyperplasia, and the presence of eosinophils in the discharge are characteristic features of allergic conjunctivitis.

**Why Each Wrong Option is Incorrect**
**Option A:** Itching is a hallmark symptom of allergic conjunctivitis, resulting from the release of histamine and other chemical mediators from mast cells.
**Option B:** Papillary hyperplasia, also known as giant papillae, is a common finding in allergic conjunctivitis, reflecting the chronic nature of the inflammation.
**Option C:** The presence of abundant eosinophils in the discharge is a characteristic feature of allergic conjunctivitis, indicating a type I hypersensitivity reaction.

**Clinical Pearl / High-Yield Fact**
When evaluating a patient with conjunctivitis, it's essential to ask about seasonal patterns of symptoms, as this can help differentiate between allergic and non-allergic causes. Additionally, a thorough medical history, including questions about environmental allergies and atopy, can aid in the diagnosis of allergic conjunctivitis.

**✓ Correct Answer:** D. Usually present throughout year