Ocular Trauma Practice Questions

Q: Which of the following is NOT a sign of blunt ocular trauma?

Corneal perforation. **Explanation:** The core concept in ocular trauma is distinguishing between **closed-globe (blunt)** and **open-globe (penetrating)** injuries. **Why Corneal Perforation is the correct answer:** Corneal perforation is a hallmark of **penetrating or open-globe trauma**, where a sharp object or high-velocity projectile breaches the full thickness of the eye wall. Blunt trauma, conversely, involves a sudden increase in intraocular pressure and equatorial expansion without a full-thickness breach of the globe. **Analysis of Incorrect Options (Signs of Blunt Trauma):** * **Sphincter Tear:** Blunt force causes a sudden pupillary dilation (traumatic mydriasis), leading to radial tears in the pupillary sphincter muscle. * **Angle Recession:** This is the most common sign of blunt trauma. It involves a tear between the longitudinal and circular muscles of the ciliary body, often leading to secondary glaucoma years later. * **Retinal Dialysis:** Blunt trauma causes rapid equatorial expansion, leading to a linear tear of the retina at the **ora serrata**. This is the most common cause of traumatic retinal detachment. **High-Yield Clinical Pearls for NEET-PG:** * **Vossius Ring:** A circular ring of pigment on the anterior lens capsule from the iris hitting the lens; pathognomonic for blunt trauma. * **Rosette Cataract:** The classic shape of a cataract following blunt injury. * **Commotio Retinae (Berlin’s Edema):** Milky white cloudiness of the retina (macula) due to blunt trauma. * **Hyphema:** Blood in the anterior chamber, frequently seen after blunt force.

Q: Clinically, in the non-injured eye, sympathetic ophthalmitis may manifest as?

All of the above. **Explanation:** **Sympathetic Ophthalmitis (SO)** is a rare, bilateral granulomatous panuveitis that occurs following a penetrating ocular injury or intraocular surgery in one eye (the **exciting eye**). The non-injured eye (the **sympathizing eye**) develops an autoimmune inflammatory response against uveal antigens (Type IV hypersensitivity). **Why "All of the above" is correct:** Because SO is a **panuveitis**, it involves the entire uveal tract and adjacent structures. Its clinical manifestations are diverse: * **Acute plastic iridocyclitis (Option A):** This is the most common early presentation in the anterior segment, characterized by "mutton-fat" keratic precipitates, aqueous flare, and cells. * **Choroiditis (Option C):** This is a hallmark of the posterior segment involvement. It often manifests as **Dalen-Fuchs nodules** (small, yellowish-white spots between the RPE and Bruch’s membrane). * **Neuroretinitis (Option B):** Inflammation can extend to the optic nerve head and retina, leading to optic disc edema and retinal vasculitis. **Clinical Pearls for NEET-PG:** * **Inciting Event:** Most commonly follows accidental penetrating trauma (80%) involving the ciliary body. * **Latent Period:** Usually occurs within 2 weeks to 3 months post-injury (65% within 2 weeks; 90% within 1 year). It almost never occurs before 10 days. * **Histopathology:** Characterized by non-necrotizing granulomatous inflammation with **sparing of the choriocapillaris**. * **Prevention:** The most effective prevention is the **enucleation** of the injured (exciting) eye within 10–14 days of injury if it has no visual potential. * **Treatment:** High-dose systemic corticosteroids and immunosuppressants.

Q: Which of the following is seen in iridodialysis?

Iris is torn away from its ciliary attachment. ### Explanation **Iridodialysis** is a traumatic condition characterized by the **detachment of the iris root from the ciliary body**. The iris root is the thinnest and weakest part of the iris, making it highly susceptible to tearing during blunt ocular trauma (e.g., a punch or a ball injury). #### Why the Correct Answer is Right: * **Option C:** By definition, iridodialysis occurs when blunt trauma causes a sudden increase in intraocular pressure, forcing the iris away from its insertion point at the **ciliary body**. This creates a peripheral "D-shaped" gap or a "second pupil" at the limbus. #### Why Other Options are Wrong: * **Option A:** Patients typically experience **monocular diplopia** (double vision in one eye), not binocular. This happens because light enters the eye through both the natural pupil and the traumatic peripheral gap, creating two images on the retina of a single eye. * **Option B:** It is a **traumatic condition**, not a degenerative one. It is usually associated with other signs of blunt trauma like hyphema or Vossius ring. * **Option D:** The pupil is **not normal**. It typically appears "D-shaped" or flattened on the side of the dialysis because the iris tension is lost at the site of the tear. #### High-Yield Clinical Pearls for NEET-PG: * **Classic Sign:** A "D-shaped" pupil with the convexity of the 'D' facing the center. * **Red Reflex:** On distant direct ophthalmoscopy, a red reflex is visible through both the pupil and the iridodialysis gap. * **Management:** Small, asymptomatic tears require no treatment. Large tears causing significant monocular diplopia or glare are treated with **surgical iridopexy**. * **Associated Risk:** Always screen for **Angle Recession Glaucoma**, as the trauma that causes iridodialysis often damages the trabecular meshwork.

Q: All are clinical features of chalcosis except?

Dalen-Fuchs' nodules. **Explanation:** **Chalcosis** refers to the specific intraocular tissue reaction caused by the retention of a copper-containing foreign body. Copper has an affinity for basement membranes, leading to characteristic depositions. **Why Dalen-Fuchs' nodules is the correct answer:** Dalen-Fuchs' nodules are **not** a feature of chalcosis. They are small, elevated, yellowish-white granulomatous nodules located between the retinal pigment epithelium (RPE) and Bruch’s membrane. They are a hallmark histopathological and clinical feature of **Sympathetic Ophthalmitis** (and occasionally Vogt-Koyanagi-Harada syndrome), representing a cell-mediated immune response following penetrating ocular trauma. **Analysis of incorrect options (Features of Chalcosis):** * **Kayser-Fleischer (KF) ring:** Copper deposits in the **Descemet’s membrane** of the peripheral cornea. While classically associated with Wilson’s disease, it also occurs in ocular chalcosis. * **Sun-flower cataract:** Copper deposits in the **anterior lens capsule** (subcapsular) in a stellate pattern with radiating petal-like extensions. * **Golden plaques at the posterior pole:** Copper particles can deposit in the retina, appearing as shiny, metallic, golden-yellow plaques, often following the course of the retinal vessels. **NEET-PG High-Yield Pearls:** * **Siderosis Bulbi:** Caused by iron foreign bodies; features include "Rusty" discoloration, iris heterochromia, and a **dilated non-reactive pupil**. * **ERG Changes:** In both Siderosis and Chalcosis, the ERG initially shows an increased a-wave, but eventually, there is a progressive decrease in b-wave amplitude, signaling retinal toxicity. * **Pure Copper (>85%):** Causes a violent suppurative endophthalmitis-like reaction. * **Alloys (<85% copper):** Lead to the chronic features of chalcosis described above.

Q: What is the most serious complication seen in the other eye after a traumatic injury to one eye?

Sympathetic ophthalmia. **Explanation:** **Sympathetic Ophthalmia (SO)** is a rare, bilateral, non-necrotizing granulomatous uveitis that occurs following a penetrating ocular injury or intraocular surgery to one eye (the **exciting eye**). The other, uninjured eye is known as the **sympathizing eye**. **Why it is the correct answer:** The underlying mechanism is an **autoimmune reaction** against uveal antigens (specifically melanin-containing antigens). Normally, the eye is an immune-privileged site. Trauma breaches the blood-ocular barrier, exposing sequestered ocular antigens to the systemic lymphatic system. This triggers a T-cell mediated delayed hypersensitivity reaction that attacks both eyes. It is considered the most serious complication because it can lead to permanent, total blindness in the previously healthy eye if not treated aggressively with systemic corticosteroids or immunosuppressants. **Why the other options are incorrect:** * **A & B (Subconjunctival hemorrhage & Corneal edema):** These are localized signs of trauma. While they may occur in the injured eye, they do not typically manifest in the contralateral "other" eye as a result of the primary injury. * **D (Sudden loss of vision):** While SO causes vision loss, it is usually insidious or subacute rather than "sudden." Sudden loss of vision in the other eye would more likely suggest a different pathology, such as a vascular event or retinal detachment. **NEET-PG High-Yield Pearls:** * **Inciting Factor:** Most common after penetrating trauma involving the **ciliary body**. * **Latent Period:** Can occur from 2 weeks to many years after injury; 65% of cases occur within 2 weeks to 2 months. * **Pathology:** Characterized by **Dalen-Fuchs nodules** (clusters of epithelioid cells between the RPE and Bruch’s membrane). * **Prevention:** If a severely traumatized eye has no chance of regaining vision, **enucleation** within 10–14 days of injury is the best preventive measure.

Q: A patient has a history of a flying metallic foreign body injury to the eye. On examination, there is evidence of intraocular metallic foreign body with progressive visual deterioration. Which of the following substances is most likely causing the toxic deposition in ocular tissues?

Iron. ***Iron*** - A metallic flying foreign body (often iron-containing) retained in the eye causes **siderosis bulbi**, a condition characterized by toxic **iron deposition** in ocular structures. - Iron ions diffuse from the retained foreign body and deposit in the cornea, lens, iris, and retina, leading to **progressive visual loss** and characteristic findings like rust-brown discoloration of the anterior lens capsule, heterochromia iridis, and retinal toxicity. - Siderosis bulbi is a serious complication requiring urgent removal of the iron-containing foreign body. *Aluminum* - Aluminum foreign bodies can cause **chalcosis** when copper-containing, but pure aluminum is relatively **inert** in the eye. - Aluminum does not cause the same toxic deposition syndrome as iron and is not associated with siderosis bulbi. *Wood* - Wood is an **organic foreign body** that primarily causes severe **inflammatory reactions** and carries a high risk of **endophthalmitis** (intraocular infection). - Wood does not cause metallic ion deposition or the specific toxicity pattern seen in siderosis bulbi. *Glass* - Glass foreign bodies are generally **inert** and well-tolerated in the eye, causing primarily mechanical trauma. - Glass does not leach metallic ions and does not cause toxic chemical deposition like siderosis bulbi.

Q: A patient sustained blunt trauma to the eye 6 months ago and now presents with blurring of vision. What is the most likely condition?

Iridodialysis. ***Iridodialysis*** - This condition involves the tearing of the **iris root** from its attachment to the **ciliary body**, which is a known complication of significant **blunt ocular trauma**. - The separation creates a secondary pupillary opening, leading to symptoms like **monocular diplopia**, **glare**, and blurred vision, consistent with the patient's presentation and the image showing a detached iris segment. *Ankyloblepharon* - Ankyloblepharon refers to the partial or complete **fusion of the eyelids**, which is a condition affecting the external adnexa, not the internal structures of the eye like the iris. - It is typically **congenital** or can result from severe chemical burns or trauma to the eyelids themselves, and does not match the clinical image. *Vossius Ring* - A Vossius ring is a circular deposit of **pigment** on the anterior surface of the **lens capsule** that occurs after blunt trauma presses the iris against the lens. - While it is an indicator of past trauma, it is a finding on the lens and is not the structural iris damage seen here. It doesn't typically cause chronic blurring of vision on its own. *Cycloiriditis* - Cycloiriditis, or **iridocyclitis**, is an **inflammatory** condition of the iris and ciliary body, presenting with pain, redness, and photophobia. - This is an inflammatory process, not a structural tear. Examination would show signs of **anterior uveitis** (cells and flare), not a physical separation of the iris tissue.

Q: A patient presents to you with pain and redness in the right eye following an injury during welding. On examination, the following is observed. Which of the following is the appropriate next step in managing this patient? ![img-12.jpeg](img-12.jpeg)

Removal by 26G needle. ***Removal by 26G needle*** - The image shows a superficial **corneal foreign body**, a common injury in welders. The definitive initial management is the physical removal of the object. - This procedure is typically performed under topical anesthesia using a slit lamp for magnification, with a fine instrument like a sterile **26-gauge needle** or a foreign body spud to gently lift the object from the cornea. *Steroids and antibiotics* - While topical antibiotics are often prescribed *after* the foreign body is removed to prevent infection, they do not address the primary problem, which is the object itself. - The use of **steroids** is generally contraindicated in the presence of a corneal epithelial defect as they can impede healing and increase the risk of a secondary infection, particularly fungal keratitis. *Surgical exploration* - Surgical exploration in an operating room is indicated for suspected **penetrating ocular injuries** or an **intraocular foreign body**, where the object has perforated the globe. - The foreign body in the image appears superficial and is not indicative of a full-thickness injury that would necessitate invasive surgical exploration. *Keratoplasty* - **Keratoplasty**, or a corneal transplant, is a major surgical procedure reserved for severe corneal scarring, opacity, or structural damage that significantly impairs vision. - This is an entirely inappropriate and excessive treatment for a small, superficial foreign body that can be removed with a minimally invasive office-based procedure.

Q: The following appearance of eye is seen in:

Wilson's disease. ***Wilson's disease (Correct)*** - The image shows a **Kayser-Fleischer ring**, a greenish-brown or golden-brown pigment ring in the peripheral cornea (Descemet's membrane), which is **pathognomonic for Wilson's disease** - Wilson's disease is an **autosomal recessive** disorder of copper metabolism (mutation in ATP7B gene), leading to copper accumulation in various tissues, including the cornea, liver, and basal ganglia - **Slit-lamp examination** is required for optimal visualization of the ring *Arcus senilis (Incorrect)* - This is a **grayish-white lipid** deposition in the peripheral cornea, common in elderly patients - It has a **clear zone** (lucid interval) between the ring and the limbus, unlike Kayser-Fleischer ring which extends to the limbus - Not pathological in elderly but may indicate hyperlipidemia in younger patients *Band keratopathy (Incorrect)* - This appears as **calcium deposition** in a horizontal band across the central cornea in the interpalpebral fissure - Associated with **chronic uveitis, hypercalcemia**, or chronic ocular surface disease - Has a characteristic **Swiss cheese appearance** with clear holes *Corneal foreign body (Incorrect)* - Would present as a **localized opacity or infiltrate**, not a circumferential ring - Associated with **history of trauma** and unilateral presentation - May have surrounding inflammation or rust ring if metallic

Question 1

Which of the following is NOT a sign of blunt ocular trauma?

Accepted Answer

Corneal perforation

Answer

Sphincter tear

Answer

Angle recession

Answer

Retinal dialysis

Question 2

Which of the following conditions does NOT occur due to blunt trauma of the eye?

Accepted Answer

Sympathetic ophthalmitis

Answer

Berlin's edema

Answer

Angle recession

Answer

Rosette cataract

Question 3

Clinically, in the non-injured eye, sympathetic ophthalmitis may manifest as?

Accepted Answer

All of the above

Answer

Acute plastic iridocyclitis

Answer

Neuroretinitis

Answer

Choroiditis

Question 4

Which of the following is seen in iridodialysis?

Accepted Answer

Iris is torn away from its ciliary attachment

Answer

Binocular diplopia

Answer

Degenerative condition

Answer

Normal pupil

Question 5

All are clinical features of chalcosis except?

Accepted Answer

Dalen-Fuchs' nodules

Answer

Kayser-Fleischer ring

Answer

Sun-flower cataract

Answer

Deposition of golden plaques at the posterior pole

Question 6

What is the most serious complication seen in the other eye after a traumatic injury to one eye?

Accepted Answer

Sympathetic ophthalmia

Answer

Subconjunctival hemorrhage

Answer

Corneal edema

Answer

Sudden loss of vision

Question 7

A patient has a history of a flying metallic foreign body injury to the eye. On examination, there is evidence of intraocular metallic foreign body with progressive visual deterioration. Which of the following substances is most likely causing the toxic deposition in ocular tissues?

Accepted Answer

Iron

Answer

Glass

Answer

Aluminum

Answer

Wood

Question 8

A patient sustained blunt trauma to the eye 6 months ago and now presents with blurring of vision. What is the most likely condition?

Accepted Answer

Iridodialysis

Answer

Vossius Ring

Answer

Cycloiriditis

Answer

Ankyloblepharon

Question 9

A patient presents to you with pain and redness in the right eye following an injury during welding. On examination, the following is observed. Which of the following is the appropriate next step in managing this patient? ![img-12.jpeg](img-12.jpeg)

Accepted Answer

Removal by 26G needle

Answer

Keratoplasty

Answer

Steroids and antibiotics

Answer

Surgical exploration

Question 10

The following appearance of eye is seen in:

Accepted Answer

Wilson's disease

Answer

Arcus senilis

Answer

Band keratopathy

Answer

Corneal foreign body

Ocular Trauma — MCQs

Ocular Trauma — MCQs

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