Ocular Trauma Practice Questions

Q: Following blunt trauma a young male presents with a D shaped pupil. What is the diagnosis?

Iridodialysis. ***Iridodialysis*** - A **D-shaped pupil** strongly suggests **iridodialysis**, which is a disinsertion of the iris root from the ciliary body. - This typically occurs after **blunt trauma** to the eye, allowing the pupil to be distorted towards the point of detachment. *Orbital fracture* - An orbital fracture often presents with **periorbital ecchymosis**, **diplopia**, **enophthalmos**, or **proptosis**, depending on the fracture location. - While it results from blunt trauma, it doesn't directly cause a D-shaped pupil but can lead to other ocular complications. *Traumatic hyphema* - Traumatic hyphema is characterized by **blood in the anterior chamber** of the eye, which can be visible as a red fluid level. - While caused by blunt trauma, it typically presents with blurred vision and pain, not a D-shaped pupil. *Iridoschisis* - Iridoschisis is a rare condition involving the **splitting of the iris stroma**, usually in the elderly, and is not typically associated with acute trauma or a D-shaped pupil. - It often leads to **fine, detached iris fibers** floating in the anterior chamber, rather than a gross deformation of the pupil.

Q: Which drug is generally contraindicated in the management of traumatic hyphema in a patient with sickle cell disease?

Acetazolamide. ***Acetazolamide*** - **Acetazolamide** is a **carbonic anhydrase inhibitor** that is **generally contraindicated** in patients with **sickle cell disease or trait**. - It causes **systemic acidosis** by increasing renal bicarbonate excretion, which lowers blood pH. - **Acidosis promotes sickling** of red blood cells, which can lead to **vaso-occlusion**, increased blood viscosity, and potential complications including **anterior chamber obstruction** and **secondary glaucoma**. - Despite its usefulness in lowering intraocular pressure in other settings, this risk makes it contraindicated in sickle cell patients with hyphema. *Timolol* - **Timolol** is a **beta-blocker** that reduces aqueous humor production and is generally **safe and effective** for reducing **intraocular pressure** in traumatic hyphema. - It does not cause systemic acidosis or affect red blood cell sickling. - Commonly used in hyphema management regardless of sickle cell status. *Steroids* - **Topical or systemic steroids** are often used to reduce **inflammation** and anterior chamber reaction in traumatic hyphema. - They help prevent **secondary hemorrhage** and reduce complications. - They do not contribute to red blood cell sickling or systemic acidosis and are safe in sickle cell disease. *Atropine* - **Atropine** is a **cycloplegic agent** used to paralyze the ciliary body and dilate the pupil, which helps **relieve pain** and prevent **posterior synechiae** in hyphema. - It has no adverse effects related to **sickle cell disease** or red blood cell sickling. - Routinely used in hyphema management.

Q: A 33-year-old patient suffers from blunt trauma to the eye. Fundoscopy shows a cherry red spot, the probable diagnosis is

Central Retinal Artery Occlusion. ***Central Retinal Artery Occlusion*** - A **cherry red spot** on fundoscopy is a classic sign of **central retinal artery occlusion (CRAO)**, occurring due to the opaque retina surrounding the fovea, which maintains its blood supply from the choroid. - While blunt trauma can cause CRAO, the primary mechanism is often an **arterial embolism** or thrombus, leading to acute, painless vision loss. *Retinoblastoma* - Retinoblastoma is a **childhood eye cancer** most commonly presenting with **leukocoria** (white pupillary reflex) and strabismus, not typically a cherry red spot. - Although it can present with retinal detachment, the characteristic fundoscopic finding is a **white intraocular mass**, not an ischemic retinal appearance. *Optic nerve transection* - Optic nerve transection results in immediate, severe vision loss and a **positive relative afferent pupillary defect (RAPD)**, but it generally does not cause a cherry red spot. - Fundoscopy after optic nerve transection would initially appear normal, with subsequent **optic disc pallor** developing over weeks to months. *Posterior Vitreous Detachment* - **Posterior vitreous detachment (PVD)** is a common age-related condition presenting with **floaters** and **flashes of light**. - Fundoscopy typically reveals a **Weiss ring** (a ring of glial tissue) and vitreous opacities, not a cherry red spot, and vision loss is often not as sudden or severe as CRAO.

Q: Berlin's edema is due to

Blunt trauma to eye. ***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.

Q: Sympathetic ophthalmitis results from -

Penetrating injury of ciliary body. ***Penetrating injury of ciliary body*** - **Sympathetic ophthalmitis** is a rare, bilateral granulomatous panuveitis that occurs after a **penetrating ocular trauma** or intraocular surgery, most commonly involving the ciliary body or uveal tissue. - The injury exposes hidden **uveal antigens** to the immune system, leading to a delayed-type hypersensitivity reaction against the fellow (non-injured) eye. - Typically develops weeks to months after the initial injury. *Glaucoma* - **Glaucoma** is a group of eye conditions that damage the optic nerve, often due to elevated intraocular pressure. - It is a consequence or complication of ocular trauma, not a cause of sympathetic ophthalmitis. - Does not involve the autoimmune mechanism seen in sympathetic ophthalmitis. *Blunt trauma to the eye* - **Blunt trauma** can cause various ocular complications (hyphema, angle recession, retinal detachment) but does not typically expose uveal antigens. - Sympathetic ophthalmitis specifically requires **penetrating injury** that disrupts the integrity of the uveal tissue. - The key distinction is penetrating vs. blunt mechanism of injury. *Trachoma* - **Trachoma** is a chronic eye infection caused by *Chlamydia trachomatis*, primarily affecting the conjunctiva and cornea. - It is an infectious process and not related to penetrating trauma or autoimmune response to uveal antigens. - Represents a completely different disease mechanism (infectious vs. autoimmune).

Q: A 20 year old man complains of difficulty in reading the newspaper with his right eye, three weeks after sustaining a gun shot injury to his left eye. The most likely diagnosis is:

Sympathetic ophthalmia. ***Sympathetic ophthalmia*** - This is a rare, bilateral **granulomatous uveitis** occurring after penetrating trauma or surgery to one eye, with symptoms typically appearing weeks to months later in the **contralateral eye**. - The delayed onset of visual difficulty in the uninjured right eye, following **gunshot injury** to the left eye three weeks prior, strongly points to an autoimmune reaction affecting both eyes. *Optic nerve avulsion* - This injury involves the complete or partial tearing of the **optic nerve** from the back of the globe, usually due to direct trauma to the eye. - Symptoms would be immediate and severe vision loss in the **injured eye**, not delayed vision loss in the contralateral eye. *Delayed vitreous hemorrhage* - A delayed **vitreous hemorrhage** would cause sudden vision loss in the **injured eye** due to blood obscuring the visual axis. - It would not explain the vision loss in the **contralateral, uninjured eye**. *Macular edema* - **Macular edema** can cause blurred or distorted vision, but it is typically a localized phenomenon, often resulting from inflammation, diabetes, or vascular occlusion. - It would affect the **injured eye** as a direct consequence of trauma, not the contralateral eye in a delayed fashion and with the specific clinicopathological features of sympathetic ophthalmia.

Q: All are ocular emergencies except

Diabetic Retinopathy. ***Diabetic Retinopathy*** - While diabetic retinopathy is a serious condition that can lead to vision loss, it is a **chronic progressive disease** that usually does not demand immediate emergency intervention. - Its progression is often slow, and even severe forms like **proliferative diabetic retinopathy** or **diabetic macular edema** are typically treated in an **urgent but not emergent** time frame. - Patients can be managed on an outpatient basis with scheduled treatments. *Bacterial endophthalmitis* - This is an **acute intraocular infection** that constitutes a true ophthalmic emergency. - Can rapidly lead to severe and **irreversible vision loss within 24-48 hours** if not treated immediately. - Requires emergency treatment with **intravitreal antibiotics** and often vitrectomy to preserve vision. *Sympathetic ophthalmia* - This is a rare, bilateral **granulomatous panuveitis** that occurs as a delayed complication (usually **2 weeks to several months**) after penetrating trauma or intraocular surgery. - While not an acute emergency at onset, once diagnosed it requires **prompt aggressive immunosuppressive therapy** (corticosteroids, immunomodulators) to prevent bilateral vision loss. - In the context of acute presentations, the **initial penetrating eye injury** itself is the emergency, not the sympathetic ophthalmia which develops later. *Eye injury* - **Ocular trauma** constitutes a true ophthalmic emergency, especially penetrating injuries, chemical burns, globe rupture, or traumatic hyphema. - Requires **immediate medical and often surgical intervention** to prevent further damage, infection, or permanent vision loss. - Timing of treatment is critical and measured in hours.

Q: Vossius ring is seen in -

Blunt trauma. ***Blunt trauma*** - A **Vossius ring** is a precisely circular deposit of pigment on the anterior lens capsule, corresponding to the pupillary margin at the time of injury. - It is a classic sign of **blunt ocular trauma**, where the iris is slammed against the anterior lens surface, leaving a pigmented imprint. *Nuclear cataract* - **Nuclear cataracts** involve the central nucleus of the lens and are primarily associated with the aging process. - They are characterized by **yellowish-brown discoloration** and hardening of the lens nucleus, not pigment deposition from trauma. *Congenital rubella* - **Congenital rubella syndrome** can cause cataracts, but these are typically **pearly nuclear cataracts** or diffuse lens opacities, not a Vossius ring. - Other ocular manifestations include **microphthalmia** and pigmentary retinopathy. *Wilson's disease* - **Wilson's disease** is characterized by copper deposition in various tissues, including the eye. - The classic ocular finding is a **Kayser-Fleischer ring**, which is a greenish-brown copper deposit in the peripheral cornea, not a Vossius ring on the lens. *Posterior subcapsular cataract* - **Posterior subcapsular cataracts** form at the back of the lens, just beneath the capsule. - They are often associated with steroid use, diabetes, or inflammation, and cause glare and difficulty with reading, but do not present as a Vossius ring.

Q: Vossius ring is seen in

Blunt trauma. ***Blunt trauma*** - A **Vossius ring** is a deposition of iris pigment on the anterior lens capsule, forming a circular or semi-circular ring. - It typically occurs as a result of **blunt trauma** to the globe, where the iris impacts the lens and leaves a pigment imprint. *Hypertensive retinopathy* - **Hypertensive retinopathy** is characterized by changes in the retinal blood vessels due to high blood pressure, such as arteriolar narrowing, hemorrhages, and exudates. - It does not involve pigment deposition on the lens capsule. *Diabetics* - **Diabetic retinopathy** is a complication of diabetes affecting the retina, leading to microaneurysms, hemorrhages, and neovascularization. - It is not associated with the formation of a Vossius ring. *After cataract* - An **after-cataract**, or posterior capsule opacification, is a common complication after cataract surgery where the posterior lens capsule becomes cloudy. - This condition occurs due to proliferation of residual lens epithelial cells and is not related to pigment deposition from blunt trauma.

Q: True about acid injury to eye are all except?

more destructive than alkali injuries. ***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 1

Following blunt trauma a young male presents with a D shaped pupil. What is the diagnosis?

Accepted Answer

Iridodialysis

Answer

Orbital fracture

Answer

Traumatic hyphema

Answer

Iridoschisis

Question 2

Which drug is generally contraindicated in the management of traumatic hyphema in a patient with sickle cell disease?

Accepted Answer

Acetazolamide

Answer

Timolol

Answer

Steroids

Answer

Atropine

Question 3

A 33-year-old patient suffers from blunt trauma to the eye. Fundoscopy shows a cherry red spot, the probable diagnosis is

Accepted Answer

Central Retinal Artery Occlusion

Answer

Retinoblastoma

Answer

Optic nerve transection

Answer

Posterior Vitreous Detachment

Question 4

Berlin's edema is due to

Accepted Answer

Blunt trauma to eye

Answer

Choroidal melanoma

Answer

Pars planitis

Answer

Extradural hemorrhage

Question 5

Sympathetic ophthalmitis results from -

Accepted Answer

Penetrating injury of ciliary body

Answer

Glaucoma

Answer

Blunt trauma to the eye

Answer

Trachoma

Question 6

A 20 year old man complains of difficulty in reading the newspaper with his right eye, three weeks after sustaining a gun shot injury to his left eye. The most likely diagnosis is:

Accepted Answer

Sympathetic ophthalmia

Answer

Optic nerve avulsion

Answer

Delayed vitreous hemorrhage

Answer

Macular edema

Question 7

All are ocular emergencies except

Accepted Answer

Diabetic Retinopathy

Answer

Bacterial endophthalmitis

Answer

Sympathetic ophthalmitis

Answer

Eye injury

Question 8

Vossius ring is seen in -

Accepted Answer

Blunt trauma

Answer

Nuclear cataract

Answer

Congenital rubella

Answer

Wilson's disease

Answer

Posterior subcapsular cataract

Question 9

Vossius ring is seen in

Accepted Answer

Blunt trauma

Answer

Hypertensive retinopathy

Answer

Diabetic retinopathy

Answer

After cataract

Question 10

True about acid injury to eye are all except?

Accepted Answer

more destructive than alkali injuries

Answer

steroids are used to control inflammation

Answer

makes a barrier and prevent deeper penetration

Answer

glaucoma is most preventable complication following acid injury

Ocular Trauma — MCQs

Ocular Trauma — MCQs

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