**Question:** In blunt injury to eye, following changes are seen EXCEPT-

A. Hyphema
B. Hypotony
C. Iris laceration
D. Corneal abrasion

**Core Concept:**
Blunt trauma to the eye can lead to various ocular injuries. The ocular structures are vulnerable due to their transparency and delicate nature. Hyphema (intravascular blood in the anterior chamber), hypotony (decreased intraocular pressure), iris laceration, and corneal abrasion are common ocular injuries associated with blunt trauma.

**Why the Correct Answer is Right:**
The correct answer, **D. Corneal abrasion**, is not mentioned as an exception because corneal abrasion is a common injury resulting from blunt trauma to the eye. It occurs when the corneal surface comes into contact with a rough surface, causing micro-scratches or abrasions. These injuries can lead to pain, foreign body sensation, photophobia, and visual disturbances.

**Why Each Wrong Option is Incorrect:**
A. Hyphema: Hyphema refers to the presence of blood in the anterior chamber due to rupture of blood vessels, usually caused by blunt trauma. It is a more severe injury and not specific to the exception mentioned.

B. Hypotony: Hypotony is a decrease in intraocular pressure caused by damage to the structures that maintain the balance of aqueous humor production, absorption, and uveal outflow. It is not specific to the exception mentioned.

C. Iris laceration: Iris laceration occurs when the iris is torn due to blunt trauma. Like hyphema and hypotony, it is not specific to the exception mentioned.

**Clinical Pearl:**
In case of blunt eye trauma, it is essential to evaluate for the presence of hyphema, hypotony, corneal abrasion, iris laceration, and others. These injuries can have severe consequences, such as vision loss, glaucoma, and endophthalmitis. Prompt medical attention is crucial.

**Explanation:**
Blunt trauma to the eye can lead to various injuries, including corneal abrasion, hyphema, hypotony, and iris laceration. However, the provided options (A, B, C) are more severe injuries and not specifically related to corneal abrasion. Corneal abrasion refers to a superficial injury to the corneal epithelium, which can cause pain, foreign body sensation, photophobia, and visual disturbances. Corneal abrasion is a common injury in blunt ocular trauma and requires prompt treatment to prevent complications like secondary infections and vision loss.