**Core Concept**
Iridodialysis refers to a condition where the iris is partially or completely separated from its normal anatomical attachment to the ciliary body. This can result from trauma, surgical complications, or other ocular injuries. The condition can lead to various symptoms and complications, including vision disturbances and increased intraocular pressure.

**Why the Correct Answer is Right**
In iridodialysis, the iris is indeed torn away from its ciliary attachment, which can lead to a range of complications. The ciliary body plays a crucial role in the production of aqueous humor and the regulation of intraocular pressure. When the iris is detached, it can cause an abnormal pathway for aqueous humor to exit the eye, leading to increased intraocular pressure and potentially severe vision loss. The detachment of the iris can also cause an irregular pupil shape and size, leading to vision disturbances such as glare and halos.

**Why Each Wrong Option is Incorrect**
**Option A:** Biocular diplopia refers to double vision caused by a misalignment of the eyes. While iridodialysis can cause vision disturbances, it is not typically associated with biocular diplopia.

**Option B:** Degenerative condition is not a characteristic of iridodialysis. The condition is typically caused by a traumatic or surgical event, rather than a degenerative process.

**Option D:** A normal pupil is not typically seen in iridodialysis. The condition often results in an irregular pupil shape and size due to the detachment of the iris.

**Clinical Pearl / High-Yield Fact**
Iridodialysis is a serious ocular emergency that requires prompt medical attention. If left untreated, it can lead to severe vision loss and even blindness. A key clinical feature of iridodialysis is the presence of an irregular pupil shape and size, which can be a useful diagnostic clue in the emergency setting.

**✓ Correct Answer: C. Iris is torn away from its ciliary attachment**