**Core Concept**
Iris cysts are benign, fluid-filled lesions that occur within the iris stroma, typically as a result of the accumulation of aqueous humor. This phenomenon is often associated with aging and is a common finding in elderly individuals. Iris cysts are usually small, spherical, and unilocular, and may be filled with a clear or turbid fluid.

**Why the Correct Answer is Right**
The exact mechanism of iris cyst formation is not fully understood, but it is thought to be related to the gradual accumulation of aqueous humor within the iris stroma. This may occur due to the failure of the iris epithelium to properly absorb or drain the aqueous humor, leading to a localized accumulation of fluid. Iris cysts are often seen in association with other age-related changes, such as posterior capsular opacification and pigment dispersion syndrome.

**Why Each Wrong Option is Incorrect**
* **Option A:** Iris cysts are not typically associated with inflammation or infection, making this option incorrect.
* **Option B:** Iris cysts are not caused by trauma or injury to the iris, making this option incorrect.
* **Option C:** Iris cysts are not a result of a genetic or inherited condition, making this option incorrect.

**Clinical Pearl / High-Yield Fact**
Iris cysts are often seen in association with other age-related changes and are a common finding in elderly individuals. They are usually benign and do not require treatment, but may be monitored for changes in size or shape.

**Correct Answer: C. Iris cysts are not a result of a genetic or inherited condition, making this option incorrect.