Ocular Trauma Practice Questions

Q: Most common immediate complication of traumatic iridodialysis is

Hyphema. ***Hyphema*** - **Traumatic iridodialysis** involves the tearing of the iris root from the ciliary body at its insertion, which directly damages blood vessels in this highly vascular area - This leads to bleeding into the anterior chamber, causing **hyphema** (collection of blood in anterior chamber) - **Hyphema is the most common immediate complication** of iridodialysis, occurring in the majority of cases - The blood typically settles inferiorly due to gravity, creating a visible fluid level *Iridoplegia* - **Iridoplegia** (traumatic mydriasis) refers to paralysis of the iris sphincter muscle, causing a fixed dilated pupil - While this can occur with severe iris trauma, it is less common than hyphema with iridodialysis - It results from direct damage to the sphincter pupillae muscle or its nerve supply rather than from the iris root avulsion itself *Angle recession* - **Angle recession** is a tear in the ciliary body face between longitudinal and circular muscle fibers - It is a distinct injury that may **coexist** with iridodialysis from the same blunt trauma, but one does not cause the other - Both are separate manifestations of blunt ocular trauma affecting different anatomical structures - Angle recession can lead to late-onset glaucoma in 5-10% of cases *Glaucoma* - **Glaucoma** is a potential **late complication** rather than an immediate result of iridodialysis - Large iridodialysis can cause hypotony initially; small dialysis may lead to chronic drainage angle abnormalities - Secondary glaucoma typically develops months to years after the initial injury - Hyphema is the acute, immediate manifestation directly caused by vascular disruption

Q: Commonest site of ocular foreign body lies in

Cornea. ***Cornea*** - The **cornea** is the **commonest site** for ocular foreign bodies, accounting for the majority of cases seen in clinical practice. - The cornea's **exposed position** on the anterior surface of the eye makes it the primary target for airborne particles, metallic debris, and environmental foreign bodies. - Corneal foreign bodies cause characteristic symptoms including **sharp pain**, **photophobia**, **foreign body sensation**, **lacrimation**, and **blepharospasm**, which typically prompt immediate medical attention. - Common sources include **metallic particles** from grinding or hammering, **dust**, **wood fragments**, and **vegetative matter**. *Subtarsal sulcus* - The subtarsal sulcus (superior palpebral fornix) is a location where foreign bodies can become lodged, particularly under the upper eyelid. - The **upper eyelid's sweeping motion** can trap particles in this groove, causing persistent irritation with each blink. - While clinically significant when they occur, foreign bodies in this location are **less frequent** than corneal foreign bodies. - These typically require **eyelid eversion** for detection and removal. *Bulbar conjunctiva* - Foreign bodies on the bulbar conjunctiva are relatively common but occur less frequently than corneal foreign bodies. - The **bulbar conjunctiva** covers the anterior sclera, and foreign bodies here are typically visible and often easily irrigated out. - The smooth surface makes adherence less likely compared to the corneal epithelium. *Limbus* - The limbus (corneoscleral junction) is a less common site for foreign body lodging. - Foreign bodies at the **limbus** can be particularly bothersome due to its **high innervation** and vascularity. - This location is less frequently affected than the central cornea.

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.

Question 1

Most common immediate complication of traumatic iridodialysis is

Accepted Answer

Hyphema

Answer

Iridoplegia

Answer

Angle recession

Answer

Glaucoma

Question 2

Commonest site of ocular foreign body lies in

Accepted Answer

Cornea

Answer

Subtarsal sulcus

Answer

Bulbar conjunctiva

Answer

Limbus

Question 3

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 4

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 5

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 6

Berlin's edema is due to

Accepted Answer

Blunt trauma to eye

Answer

Choroidal melanoma

Answer

Pars planitis

Answer

Extradural hemorrhage

Question 7

Sympathetic ophthalmitis results from -

Accepted Answer

Penetrating injury of ciliary body

Answer

Glaucoma

Answer

Blunt trauma to the eye

Answer

Trachoma

Question 8

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 9

All are ocular emergencies except

Accepted Answer

Diabetic Retinopathy

Answer

Bacterial endophthalmitis

Answer

Sympathetic ophthalmitis

Answer

Eye injury

Question 10

Vossius ring is seen in -

Accepted Answer

Blunt trauma

Answer

Nuclear cataract

Answer

Congenital rubella

Answer

Wilson's disease

Answer

Posterior subcapsular cataract

Ocular Trauma — MCQs

Ocular Trauma — MCQs

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