## Core Concept
Blunt trauma to the eye can cause various injuries due to the shockwave transmitted through the eye and the sudden increase in intraocular pressure. These injuries can include damage to the anterior segment (like hyphaema, lens dislocation, and cataract) and the posterior segment (like vitreous detachment, retinal damage, and macular damage).

## Why the Correct Answer is Right
Vitreous detachment is a well-recognized complication of blunt ocular trauma. The sudden increase in intraocular pressure can cause a posterior vitreous detachment (PVD), where the vitreous gel separates from the retina. This is a common cause of visual disturbances and can lead to retinal tears or retinal detachment if not properly managed.

## Why Each Wrong Option is Incorrect
- **Option A:** While hyphaema is a possible consequence of blunt trauma, it refers specifically to the accumulation of blood in the anterior chamber of the eye, not directly related to detachment due to hemorrhage in the context provided.
- **Option B:** Cataract can indeed be a late effect of blunt trauma, but it's not directly described as a detachment due to hemorrhage.
- **Option C:** Damage to the macula or retinal damage can occur but is not explicitly described as a "detachment due to hemorrhage."
- **Option D:** Orbital fracture, while possible, does not fit the context of intraocular complications like detachment due to hemorrhage.

## Clinical Pearl / High-Yield Fact
A key point to remember is that posterior vitreous detachment (PVD) can occur after blunt trauma and may lead to more serious complications like retinal tears or detachments. Patients with symptoms like new-onset floaters after trauma should be urgently evaluated for these complications.

## Correct Answer Line
**Correct Answer: C. Vitreous detachment.**