## Core Concept
The question assesses knowledge about the impact of different types of cataracts on vision. Cataracts are a leading cause of vision loss worldwide and can be classified based on their location within the lens, such as nuclear, cortical, posterior subcapsular, and anterior polar cataracts. Each type affects vision differently.

## Why the Correct Answer is Right
The correct answer, posterior subcapsular cataract (PSC), is associated with minimal vision loss in its early stages compared to other types. PSC cataracts start as a small, opaque area that usually forms on the back (posterior) of the lens, right in the path of light. Despite their small size, they can cause significant glare and light sensitivity. However, in early stages, they might not cause significant visual impairment compared to the rapid progression seen with other types.

## Why Each Wrong Option is Incorrect
- **Option A:** Nuclear cataracts involve the central part of the lens and often cause myopia (nearsightedness) due to the swelling of the lens. They can lead to significant vision loss as they progress.
- **Option B:** Cortical cataracts affect the lens cortex and can cause significant visual disturbances due to the spoke-like opacities that can interfere with light passing through.
- **Option D:** Anterior polar cataracts are located in the front part of the lens and can cause significant visual impairment due to their location directly in the path of light.

## Clinical Pearl / High-Yield Fact
A key point to remember is that posterior subcapsular cataracts (PSC) are particularly associated with **steroid use** and **radiation exposure**. They can also occur in younger individuals and may be part of certain systemic conditions. Despite potentially causing minimal vision loss initially, PSC cataracts can significantly impact vision as they progress.

## Correct Answer: C. Posterior Subcapsular Cataract.