Vitrectomy should be considered if the vitreous haemorrhage is not absorbed within
**Core Concept**
Vitreous haemorrhage is a condition characterized by the accumulation of blood in the vitreous gel of the eye, which can lead to vision loss. The decision to perform a vitrectomy, a surgical procedure to remove the vitreous gel and blood, depends on the duration of the haemorrhage and its impact on vision.
**Why the Correct Answer is Right**
Vitreous haemorrhage typically resolves on its own within 6-8 weeks. However, if the haemorrhage persists beyond this period, it may lead to irreversible damage to the retina and subsequent vision loss. In such cases, a vitrectomy is considered to remove the blood and debris, allowing for retinal reattachment and restoration of vision. The timing of vitrectomy is crucial, as it should be performed before the formation of fibrotic membranes and scarring in the vitreous, which can make the procedure more challenging.
**Why Each Wrong Option is Incorrect**
**Option A:** Performing a vitrectomy too early, when the haemorrhage is still fresh, can lead to complications such as retinal damage and increased intraocular pressure.
**Option B:** Waiting too long to perform a vitrectomy, beyond 12 weeks, can result in permanent vision loss due to chronic retinal ischemia and fibrosis.
**Option C:** Vitrectomy is not typically indicated for small, asymptomatic vitreous haemorrhages, as they often resolve on their own with minimal impact on vision.
**Clinical Pearl / High-Yield Fact**
The timing of vitrectomy in cases of vitreous haemorrhage is critical, and a general rule of thumb is to wait for 6-8 weeks before considering surgery, as this allows for spontaneous resolution in many cases, minimizing the risk of complications.
**Correct Answer:** B. 12 weeks