Most common type of cataract following radiation is –
**Core Concept**
Cataracts following radiation exposure are a type of radiation-induced ocular injury, which can lead to vision impairment. This condition is caused by the damage to the lens epithelial cells in the eye due to ionizing radiation.
**Why the Correct Answer is Right**
The most common type of cataract following radiation is the posterior subcapsular cataract (PSC). This is because the posterior lens capsule is more susceptible to radiation-induced damage, leading to the formation of a cataract in this area. The pathophysiology involves the disruption of the normal lens cell growth and differentiation, resulting in the formation of a cataractous lesion.
**Why Each Wrong Option is Incorrect**
**Option A:** Cortical cataract is not the most common type of cataract following radiation exposure.
**Option B:** Nuclear cataract is also not the most common type, although it can occur due to prolonged radiation exposure.
**Option C:** Snowflake cataract is a rare type of cataract, not typically associated with radiation exposure.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that radiation-induced cataracts can occur years after radiation exposure, making it a significant concern for individuals who have undergone radiation therapy for cancer. The risk of developing cataracts increases with the dose and duration of radiation exposure.
**Correct Answer: A. Posterior subcapsular cataract.**