Classification of Ocular Trauma — MCQs
All of the following are complications of traumatic hyphema except which of the following?
Type of injury in which depth of wound is more than the width is called as:
What will be the Glasgow Coma Scale (GCS) score for a head injury patient who opens eyes to painful stimulus, uses inappropriate words, and localizes pain?
In which of the following conditions does Berlin's edema occur?
Which of the following is known as the dangerous zone of the eye?
Berlin's edema is due to
Sympathetic ophthalmia is due to
Hyphaema, or blood in the anterior chamber, is suggestive of:
True about acid injury to eye are all except?
Diameter of the Vossius's ring is
Classification of Ocular Trauma Indian Medical PG Practice Questions and MCQs
Question 1: All of the following are complications of traumatic hyphema except which of the following?
- A. Pupillary Block
- B. Posterior synechiae
- C. Rebleeding
- D. Corneal Ulcer (Correct Answer)
Explanation: ***Corneal Ulcer*** - A **corneal ulcer** is typically caused by infection, trauma, or exposure keratitis and is not a direct complication of blood in the anterior chamber from a **traumatic hyphema**. - While prolonged elevation of **intraocular pressure** from hyphema could theoretically impair corneal health, a direct ulcer is not a typical or primary complication. *Rebleeding* - **Rebleeding** is a common and serious complication of hyphema, usually occurring 2-7 days after the initial injury. - It often results in a more significant bleed and carries a higher risk of complications such as **elevated intraocular pressure** and **blood staining of the cornea**. *Pupillary Block* - **Pupillary block** can occur if the amount of blood from the hyphema prevents the flow of aqueous humor from the posterior to the anterior chamber. - This blockage leads to a buildup of **aqueous humor** in the posterior chamber, causing the iris to bow forward and potentially precipitating **acute angle-closure glaucoma**. *Posterior synechiae* - **Posterior synechiae** can develop due to inflammation (uveitis) associated with the hyphema, where the iris adheres to the anterior lens capsule. - This complication can lead to **irregular pupil shape**, **pupillary block glaucoma**, or other visual disturbances.
Question 2: Type of injury in which depth of wound is more than the width is called as:
- A. Contusion
- B. Slash
- C. Stab (Correct Answer)
- D. Laceration
Explanation: ***Stab*** - A **stab wound** is defined by its **depth being greater than its width**, as it is caused by a pointed object penetrating deeply into tissues. - These wounds can injure internal organs, and the external appearance may not fully reflect the **severity of the internal damage**. - This is the characteristic feature that matches the question - **depth exceeds width/length**. *Slash* - A **slash wound** is characterized by its length being significantly greater than its depth, often resulting from a **slicing motion** with a sharp object. - These wounds typically have **clean, sharply defined edges** and are superficial, primarily affecting the epidermis and dermis. *Laceration* - A **laceration** is an **irregularly shaped wound** caused by the tearing or crushing of soft tissues. - It usually has **jagged, uneven edges** and is often associated with blunt force trauma, differing from the clean edges of a slash wound. *Contusion* - A **contusion**, or bruise, is a type of injury where **blood vessels rupture beneath the skin** without a break in the skin surface. - It is characterized by **discoloration (ecchymosis)** and swelling, resulting from blunt force but not involving an open wound.
Question 3: What will be the Glasgow Coma Scale (GCS) score for a head injury patient who opens eyes to painful stimulus, uses inappropriate words, and localizes pain?
- A. 10 (Correct Answer)
- B. 14
- C. 8
- D. 12
Explanation: ***10*** - The patient opens eyes to **painful stimulus (E2)**, uses **inappropriate words (V3)**, and **localizes pain (M5)**. - Summing these scores: **E2 + V3 + M5 = 10**. - This represents a **moderate head injury** (GCS 9-12). *14* - This score would require higher functioning in multiple domains. - Would need responses such as opening eyes to **speech (E3)**, **confused conversation (V4)**, and **localizing or obeying commands (M5-M6)**. - The described patient's responses do not reach this level of function. *8* - A GCS of **8 or less** indicates **severe head injury** requiring immediate **airway protection and intubation**. - The patient's ability to **localize pain (M5)** and use **inappropriate words (V3)** indicates a consciousness level above severe injury threshold. - This patient does not meet criteria for severe head injury. *12* - This score would require better responses in at least two categories. - Could include: opening eyes to **speech (E3)**, **confused conversation (V4)**, or **obeying commands (M6)**. - The patient's specified responses (E2 + V3 + M5) sum to only 10, not 12.
Question 4: In which of the following conditions does Berlin's edema occur?
- A. Open angle glaucoma
- B. After cataract surgery
- C. After concussional trauma (Correct Answer)
- D. Diabetic retinopathy
Explanation: ***After concussional trauma*** - **Berlin's edema**, also known as **commotio retinae**, is a form of **retinal edema** that occurs following **blunt trauma** to the eye. - It results from the disruption of the **photoreceptor outer segments** and retinal pigment epithelium, leading to a **dull, gray-white appearance** of the retina. *Open angle glaucoma* - Characterized by **progressive optic nerve damage** and visual field loss, typically due to elevated intraocular pressure, without retinal edema. - The primary pathology involves the **trabecular meshwork**, not direct retinal swelling. *After cataract surgery* - A common complication is **cystoid macular edema** (Irvine-Gass syndrome), which affects the macula and can cause blurred vision. - This is distinct from Berlin's edema, as it is a **post-surgical inflammatory response**, not a direct traumatic injury. *Diabetic retinopathy* - Involves various retinal changes due to diabetes, such as **microaneurysms**, hemorrhages, and **macular edema** from leaky vessels. - It is a **metabolic and vascular disease**, not a direct consequence of acute ocular trauma.
Question 5: Which of the following is known as the dangerous zone of the eye?
- A. Optic nerve
- B. Retina
- C. Ciliary body (Correct Answer)
- D. Sclera
Explanation: ***Ciliary body*** - The **dangerous zone** (or dangerous area) of the eye refers to the region approximately **3-4 mm posterior to the limbus**, which overlies the **pars plana of the ciliary body**. - This area is termed "dangerous" because penetrating injuries or surgical trauma in this zone can result in multiple serious complications: - **Ciliary body damage** → Hypotony, hemorrhage, sympathetic ophthalmia - **Lens injury** → Traumatic cataract formation - **Vitreous involvement** → Endophthalmitis, vitreous hemorrhage, retinal detachment - This zone is clinically significant because the **extraocular muscles insert** near this region, and it represents the thinnest part of the sclera with underlying vital structures. *Sclera* - While the sclera forms the outer protective coat of the eye and can be vulnerable to trauma, the term "dangerous zone" specifically refers to a particular region (overlying the ciliary body), not the sclera as a whole. - The sclera provides structural support but is not itself called the dangerous zone. *Optic nerve* - The optic nerve transmits visual information from the retina to the brain and damage causes irreversible vision loss. - However, it is not referred to as the "dangerous zone" in ophthalmological terminology. *Retina* - The retina is the light-sensitive neurosensory tissue essential for vision. - Retinal damage leads to vision loss (e.g., retinal detachment, macular degeneration), but it is not termed the "dangerous zone."
Question 6: Berlin's edema is due to
- A. Blunt trauma to eye (Correct Answer)
- B. Choroidal melanoma
- C. Pars planitis
- D. Extradural hemorrhage
Explanation: ***Blunt trauma to eye*** - **Berlin's edema**, also known as **commotio retinae**, is a form of **retinal edema** that occurs after **blunt trauma to the eye**. - The trauma causes a disruption of the photoreceptor outer segments and retinal pigment epithelium, leading to extracellular and intracellular fluid accumulation. *Choroidal melanoma* - This is a **malignant tumor** arising from the melanocytes in the choroid, not caused by trauma. - Presents as a pigmented mass in the choroid and can lead to **retinal detachment** or **vision loss** due to tumor growth. *Pars planitis* - This is a form of **intermediate uveitis**, characterized by inflammation of the pars plana, ciliary body, and peripheral retina. - It is an **inflammatory condition**, not directly caused by acute trauma, and often presents with **floaters** and **blurred vision**. *Extradural hemorrhage* - This refers to bleeding between the inner surface of the skull and the dura mater, typically in the brain. - It is a **neurological emergency** usually caused by head injury, and its direct effect is not Berlin's edema in the eye.
Question 7: Sympathetic ophthalmia is due to
- A. Chemical injury
- B. Blunt trauma
- C. Retained intra ocular Iron foreign body
- D. Penetrating trauma (Correct Answer)
Explanation: ***Penetrating trauma*** - **Sympathetic ophthalmia** is a rare, bilateral granulomatous panuveitis that occurs after **penetrating trauma** or surgery to one eye (the exciting eye). - The injury exposes **uveal antigens** to the immune system, leading to a delayed hypersensitivity reaction affecting both the injured and the uninjured (sympathizing) eye. *Chemical injury* - Chemical injuries to the eye typically cause corneal damage, conjunctivitis, and uveitis, but do not commonly lead to the bilateral immune response characteristic of **sympathetic ophthalmia**. - The mechanism of injury in chemical trauma does not involve the exposure of hidden ocular antigens in a way that triggers **autoimmune uveitis**. *Blunt trauma* - **Blunt trauma** to the eye can cause various issues like hyphema, retinal detachment, or orbital fractures. - While it can cause significant damage, it generally does not typically breach the globe in a manner that exposes uveal tissue to the systemic immune system, leading to **sympathetic ophthalmia**. *Retained intra ocular Iron foreign body* - An intraocular **iron foreign body** can cause **siderosis bulbi**, a condition where iron deposition leads to pigmentation and degeneration of ocular tissues. - This is a direct toxic effect of iron and is distinct from the immune-mediated inflammation seen in **sympathetic ophthalmia**.
Question 8: Hyphaema, or blood in the anterior chamber, is suggestive of:
- A. Intraocular trauma (Correct Answer)
- B. Posterior uveitis
- C. Capillary hemangioma of the lid
- D. High grade myopia
Explanation: ***Intraocular trauma*** - **Hyphaema**, or blood in the **anterior chamber**, is a classic sign of **intraocular trauma**, where eye structures are damaged, leading to bleeding. - This can result from blunt force or penetrating injuries that rupture blood vessels within the **iris, ciliary body**, or other anterior segment structures. *Posterior uveitis* - Posterior uveitis involves inflammation of the **choroid and retina**, not typically causing bleeding into the **anterior chamber**. - It presents with symptoms like **floaters** and **decreased vision**, without direct hyphaema. *Capillary hemangioma of the lid* - A capillary hemangioma is a **benign vascular tumor** on the eyelid and does not cause **intraocular bleeding** into the anterior chamber. - While it can disrupt vision by blocking the visual axis, it is an **external lesion**. *High grade myopia* - High grade myopia leads to a **stretched globe** and **retinal thinning**, increasing the risk of **retinal detachment** or **macular degeneration**. - It does not directly cause **hyphaema**, which is an anterior chamber bleeding event.
Question 9: True about acid injury to eye are all except?
- A. more destructive than alkali injuries (Correct Answer)
- B. steroids are used to control inflammation
- C. makes a barrier and prevent deeper penetration
- D. glaucoma is most preventable complication following acid injury
Explanation: ***more destructive than alkali injuries*** - This statement is **false**. **Alkali burns** are generally more severe than acid burns because alkalis have **liquefactive necrosis**, which allows them to penetrate deeper into ocular tissues. - Acids cause **coagulative necrosis**, which forms a protective barrier that limits further penetration, making them typically less destructive than alkali injuries. *steroids are used to control inflammation* - **Topical corticosteroids** are commonly used in the management of ocular chemical burns, including acid injuries, to help **control inflammation** and reduce the risk of secondary complications. - However, their use must be carefully monitored due to potential side effects like increased intraocular pressure and delayed corneal healing. *makes a barrier and prevent deeper penetration* - **Acidic substances** cause **coagulative necrosis** of the superficial tissues, which creates a protective barrier of denatured proteins. - This barrier helps to prevent the acid from penetrating deeper into the ocular structures, thus often limiting the extent of damage compared to alkali burns. *glaucoma is most preventable complication following acid injury* - **Glaucoma** is indeed a significant complication of ocular acid injuries and can be prevented through **immediate copious irrigation**, control of inflammation, and monitoring of intraocular pressure. - While various complications can occur (corneal opacification, symblepharon, limbal stem cell deficiency), glaucoma prevention through early intervention and appropriate medical management is a key focus in acute management, making this statement acceptable as true.
Question 10: Diameter of the Vossius's ring is
- A. Equal to normal pupil
- B. Smaller than the normal pupil (Correct Answer)
- C. Much larger than the normal pupil
- D. Slightly larger than the normal pupil
Explanation: ***Smaller than the normal pupil*** - The **Vossius's ring** is a deposition of pigment on the anterior lens capsule, formed by contact with the iris during trauma. - Due to the **constriction of the pupil** at the time of impact, the imprinting tends to be *smaller* than the resting pupil size. *Equal to normal pupil* - This is incorrect because the ring represents the imprint of the **pupillary margin** against the lens during a moment of **miosis (pupil constriction)** following trauma, not the normal resting pupil size. - The transient nature of the trauma-induced miosis means the imprinted diameter will be less than the typical **resting/normal pupil diameter**. *Much larger than the normal pupil* - This is incorrect because trauma usually causes **pupillary spasm and miosis**, which would result in a *smaller* imprint, not a larger one. - A larger imprint would imply a **dilated pupil** at the time of impact, which is contrary to the typical physiological response. *Slightly larger than the normal pupil* - This is incorrect as the trauma-induced **miosis** would make the imprint *smaller* than the normal pupil, not larger. - Even a slight increase in size would contradict the mechanism of formation, which involves temporary **pupillary constriction**.
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