**Core Concept**
Aphakia is a condition where the lens of the eye is absent or has been removed, often due to cataract surgery. The treatment of choice for aphakia involves correcting the refractive error caused by the absence of the lens.

**Why the Correct Answer is Right**
The treatment of choice for aphakia is high plus power convex lens, which corrects the high degree of hypermetropia caused by the absent lens. This type of lens is used to converge light rays onto the retina, allowing the patient to see clearly. The high plus power convex lens is typically prescribed in combination with a pinhole or a contact lens to reduce aberrations and improve visual acuity.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because aphakia is not typically treated with a low power convex lens, which would not provide sufficient correction for the high degree of hypermetropia.
**Option B:** This option is incorrect because contact lenses alone may not provide sufficient correction for aphakia, and may not be suitable for all patients.
**Option C:** This option is incorrect because intraocular lenses (IOLs) are a common treatment option for aphakia, but they are not the only option, and may not be suitable for all patients.

**Clinical Pearl / High-Yield Fact**
It's essential to note that aphakia can cause significant visual impairment if left untreated, and prompt correction with a high plus power convex lens is crucial for restoring vision.

**Correct Answer: D. High plus power convex lens.**