**Core Concept**
The attachment of vitreous to the retina is a critical aspect of ocular anatomy and surgery. The vitreous body is a gelatinous substance that fills the center of the eye, and its attachment to the retina is essential for maintaining the structural integrity of the eye.

**Why the Correct Answer is Right**
The attachment of vitreous is strongest at the vitreous base, which is the area where the vitreous is attached to the retina at the ora serrata, the serrated edge of the retina near the pars plana of the ciliary body. This area is particularly robust due to the presence of stronger adhesion molecules and a thicker vitreous cortex. The vitreous base is a critical area for surgeons to avoid during vitreoretinal surgery to prevent retinal tears and detachment.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the vitreous attachment is not strongest at the posterior pole of the eye, where the vitreous is thinner and more prone to detachment.

**Option B:** This option is incorrect because the vitreous attachment is not strongest at the equator of the eye, where the vitreous is still relatively thin and mobile.

**Option C:** This option is incorrect because the vitreous attachment is not strongest at the optic disc, where the vitreous is thinner and more prone to detachment.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that the vitreous base is the area where the vitreous is most firmly attached to the retina, and it is a critical area for surgeons to avoid during vitreoretinal surgery.

**Correct Answer: A. Vitreous base.**