**Core Concept**
Endophthalmitis is a severe inflammation of the interior of the eye, usually caused by an infection. It can lead to vision loss if not promptly treated. This condition is characterized by a range of clinical features that require prompt recognition and management.

**Why the Correct Answer is Right**
The clinical features of endophthalmitis include severe pain, redness, swelling, and sensitivity to light. Patients often present with decreased vision, and in severe cases, they may experience double vision or even total loss of vision. The correct answer should not be associated with these characteristic symptoms.

**Why Each Wrong Option is Incorrect**
**Option A:** Severe pain is a common feature of endophthalmitis due to the intense inflammation of the eye's interior. This symptom is closely related to the pathophysiology of the condition.
**Option B:** Decreased vision is a hallmark of endophthalmitis, often resulting from the infection or inflammation affecting the retina or other critical structures within the eye.
**Option C:** Redness and swelling of the eye are typical signs of endophthalmitis, reflecting the intense inflammation and infection within the eye.

**Clinical Pearl / High-Yield Fact**
Endophthalmitis is a medical emergency that requires prompt recognition and treatment. Delayed treatment can lead to severe vision loss or even blindness.

**Correct Answer: D.**