**Core Concept**
Primary open-angle glaucoma (POAG) is a common cause of irreversible vision loss, characterized by progressive optic nerve damage due to elevated intraocular pressure (IOP). Ocular associations of POAG are crucial for understanding the disease's pathophysiology and management.

**Why the Correct Answer is Right**
POAG is often associated with a combination of genetic and environmental factors. Key ocular associations include myopia, which may be a risk factor for POAG due to the increased axial length of the eye. Additionally, POAG has been linked to other ocular conditions such as retinal detachment, cataract, and age-related macular degeneration. However, the correct answer is not listed, so let's evaluate the incorrect options.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because myopia is actually a risk factor for POAG, not a rare association.
* **Option B:** This option is incorrect because posterior vitreous detachment (PVD) is sometimes seen in patients with POAG, but it is not a rare or unusual association.
* **Option C:** This option is incorrect because retinal detachment is a serious ocular emergency that can occur in patients with POAG, but it is not a rare association.

**Clinical Pearl / High-Yield Fact**
A key clinical pearl to remember is that POAG often presents with a subtle, asymptomatic decline in vision, making regular eye examinations crucial for early detection and management.

**Correct Answer: None of the above. Ocular associations of primary open-angle glaucoma include myopia, retinal detachment, and age-related macular degeneration, among others.**