**Core Concept**
Regional anesthesia involves administering local anesthetics to specific nerves or areas of the body to block pain signals. It requires careful patient selection, and certain conditions make regional anesthesia a high-risk procedure.

**Why the Correct Answer is Right**
INR (International Normalized Ratio) > 2 is not an absolute contraindication for regional anesthesia in ophthalmic procedures. This is because the risk of bleeding is relatively low with surface anesthesia used in ophthalmology, and the benefits of regional anesthesia often outweigh the risks. In contrast, other conditions listed in the options would pose significant risks during regional anesthesia. **Option A (Patient refusal)** and **Option C (Lack of resuscitation facilities)** are considered absolute contraindications because they compromise patient safety. **Option B (Lack of nerve stimulator)** is also an absolute contraindication because a nerve stimulator is essential for ensuring proper placement of the local anesthetic and preventing nerve injury.

**Why Each Wrong Option is Incorrect**
**Option A:** Patient refusal is an absolute contraindication for regional anesthesia because it indicates a lack of informed consent and may compromise patient safety. Regional anesthesia requires careful patient selection and informed consent.
**Option B:** A lack of nerve stimulator is an absolute contraindication because it makes it impossible to ensure proper placement of the local anesthetic and prevents the detection of nerve injury.
**Option C:** Lack of resuscitation facilities is an absolute contraindication because it compromises patient safety and the ability to manage potential complications.

**Clinical Pearl / High-Yield Fact**
Remember that patient selection is crucial for regional anesthesia. Always assess the patient's medical history, laboratory results, and potential risks before proceeding with the procedure.

**✓ Correct Answer: D. INR > 2 in ophthalmic procedures**