Diseases of the Retina Practice Questions

Q: A 65-year-old patient presents with acute vision loss and is diagnosed with central retinal artery occlusion. What is the most appropriate immediate intervention to attempt to restore vision?

Ocular massage. ***Ocular massage*** - **Ocular massage** is an immediate intervention used to attempt to dislodge the **embolic clot** and move it into a smaller branch of the retinal artery, potentially restoring some blood flow. - This maneuver aims to reduce intraocular pressure, which can also help improve retinal perfusion. - It is the **most appropriate immediate intervention** because it can be performed **instantly at bedside** without special equipment or screening. *Laser photocoagulation* - **Laser photocoagulation** is generally used to treat retinal conditions such as **diabetic retinopathy** or retinal tears, not for acute central retinal artery occlusion. - It works by creating small burns to seal blood vessels or destroy abnormal tissue, which would not address an acute arterial blockage. *Intravitreal injection of anti-VEGF* - **Anti-VEGF injections** are commonly used to treat conditions involving **neovascularization** or **macular edema**, such as wet age-related macular degeneration or diabetic macular edema. - They are not indicated for restoring blood flow in an acute arterial occlusion, whose primary pathology is embolic. *Intravenous thrombolysis* - While **intravenous thrombolysis (IV tPA)** has been explored for CRAO and is used in some specialized centers within a **very narrow time window** (typically <4.5 hours), it requires careful patient screening for contraindications and immediate availability of resources. - Compared to **ocular massage**, which can be performed immediately at bedside, IV thrombolysis is **not the most appropriate immediate intervention** due to time required for screening, contraindication assessment, and administration. - Evidence for its efficacy remains controversial, with some studies showing benefit and others showing no significant visual improvement compared to conservative measures.

Q: A 5-year-old child is brought in with leukocoria and a family history of ocular tumors. Fundus examination reveals a white mass. What is the most likely diagnosis?

Retinoblastoma. **Retinoblastoma** - **Leukocoria**, a **whitish pupillary reflex**, is the most common presenting sign of retinoblastoma, especially in children, and the **white mass** seen on fundus examination is characteristic of the tumor. - A **family history of ocular tumors** strongly suggests a genetic predisposition to retinoblastoma, as mutations in the **RB1 gene** are often inherited. - Retinoblastoma is the **most common intraocular malignancy in children**, typically presenting before age 5 years. *Congenital cataract* - While congenital cataracts can cause **leukocoria**, they typically present as a hazy or cloudy lens rather than a **solid white mass** on fundus examination. - A **family history of ocular tumors** is not typically associated with congenital cataracts. - The cataract would be seen in the **lens**, not as a retinal mass. *Coats' disease* - Coats' disease is characterized by **abnormal retinal blood vessels** and **exudative retinal detachment**, leading to leukocoria. - However, it typically presents with **telangiectatic vessels** and lipid exudates rather than a discrete white mass, and a **family history of ocular tumors** is not a common feature. - Usually **unilateral** and occurs in young males with **no hereditary pattern**. *Persistent hyperplastic primary vitreous* - This condition results from the **failure of the primary vitreous to regress** and can cause leukocoria due to a retrolental membrane. - While it presents with leukocoria, fundus examination would reveal a **retrolental fibrovascular membrane** rather than a distinct white intraocular mass, and it is not strongly linked to a **family history of ocular tumors**. - Typically **unilateral** and **non-hereditary**.

Q: Which diagnostic test is the most sensitive for detecting early diabetic macular edema?

Optical coherence tomography. ***Optical coherence tomography*** - **Optical coherence tomography (OCT)** is considered the gold standard for detecting and quantifying **macular edema** due to its ability to provide high-resolution, cross-sectional imaging of the retina. - It can visualize and measure **intraretinal and subretinal fluid**, as well as monitor treatment response. - OCT has the highest sensitivity for detecting **early diabetic macular edema** before it becomes clinically apparent on fundoscopy. *Fluorescein angiography* - While useful for detecting **leakage from microaneurysms** and identifying areas of **ischemia**, it primarily provides information about vascular integrity rather than quantifying edema directly. - It is an invasive procedure and does not offer the same detailed anatomical resolution of retinal layers as OCT. - Better suited for assessing capillary non-perfusion and neovascularization. *Ultrasound B-scan* - This test is typically used for imaging the posterior segment when ocular media opacities (e.g., **dense cataracts**, **vitreous hemorrhage**) preclude direct visualization. - It has a much lower resolution compared to OCT and is not precise enough to detect subtle or early **macular edema**. - Primarily used for detecting gross structural abnormalities like retinal detachment or intraocular masses. *Visual field testing* - **Visual field testing** assesses the extent of a person's peripheral and central vision, which is more relevant for conditions like **glaucoma** or **optic nerve damage**. - It can detect functional visual loss but does not directly visualize or quantify **macular edema**. - Changes in central vision may occur with advanced DME, but this is a functional test, not a diagnostic imaging modality for detecting anatomical changes.

Q: A 60-year-old patient with age-related macular degeneration presents with a sudden onset of central vision loss. Fundoscopy reveals subretinal hemorrhage. What is the recommended treatment?

Intravitreal anti-VEGF injection. ***Intravitreal anti-VEGF injection*** - The sudden onset of **central vision loss** and **subretinal hemorrhage** in a patient with age-related macular degeneration (AMD) indicates **wet AMD**, which is characterized by the growth of abnormal new blood vessels in the choroid (choroidal neovascularization, **CNV**). - **Anti-VEGF agents** (vascular endothelial growth factor inhibitors) are the **first-line treatment** for wet AMD, as they target the underlying angiogenesis and reduce leakage and hemorrhage from these abnormal vessels, thereby preserving or improving vision. *Laser photocoagulation* - **Laser photocoagulation** was historically used for some types of CNV; however, it causes **permanent destruction** of the treated area, leading to a **scotoma** (blind spot) in the visual field. - Its use has been largely superseded by anti-VEGF therapy, especially for lesions involving the **fovea**, due to the significant risk of vision loss. *Intravitreal corticosteroids* - While sometimes used in other retinal conditions with inflammation or edema, **intravitreal corticosteroids** are **not the primary treatment** for wet AMD. - They do not address the fundamental angiogenic process of wet AMD and carry risks such as **cataract formation** and **increased intraocular pressure**. *Observation* - Wet AMD, particularly with **subretinal hemorrhage**, is a **sight-threatening condition** that requires prompt intervention. - **Observation** without treatment would invariably lead to **progressive vision loss** due to ongoing bleeding, fluid leakage, and scarring from the untreated CNV.

Q: A diabetic patient presents with blurred vision. Fundoscopy reveals microaneurysms, dot-blot hemorrhages, and hard exudates in the macular region. OCT confirms center-involving diabetic macular edema. What is the most appropriate next step in management?

Intravitreal anti-VEGF injection. ***Intravitreal anti-VEGF injection*** - **Diabetic macular edema (DME)**, especially when center-involving, is primarily treated with **intravitreal anti-VEGF injections** to reduce vascular leakage and swelling. - This therapy aims to improve or stabilize vision by targeting the underlying pathophysiology of increased vascular permeability in DME. *Panretinal photocoagulation* - This treatment is primarily used for **proliferative diabetic retinopathy (PDR)** to ablate ischemic peripheral retina and prevent neovascularization. - It is not the first-line treatment for **center-involving DME**, where the goal is to reduce macular swelling and improve vision. *Focal laser treatment* - **Focal laser** can be used for **clinically significant macular edema** but is less effective for **center-involving DME** compared to anti-VEGF agents, particularly when the edema is diffuse. - It targets specific leaking microaneurysms, but its role has largely been supplanted by anti-VEGF for widespread macular edema. *Vitrectomy* - **Vitrectomy** is typically reserved for advanced complications of diabetic retinopathy such as **vitreous hemorrhage** that doesn't clear, **tractional retinal detachment**, or severe **epiretinal membranes**. - It is not the primary treatment for **diabetic macular edema**, even when center-involving.

Q: A 45-year-old woman with diabetes presents with worsening vision. Fundoscopy reveals proliferative diabetic retinopathy. Which treatment option has been shown to be effective in reducing the risk of severe vision loss?

Panretinal photocoagulation. ***Panretinal photocoagulation*** - This treatment uses a laser to create burns in the peripheral retina, destroying ischemic tissue and reducing the production of **vascular endothelial growth factor (VEGF)**, thereby preventing new, fragile blood vessel formation and ultimately reducing the risk of severe vision loss in **proliferative diabetic retinopathy (PDR)**. - PRP is the standard of care for severe non-proliferative and proliferative diabetic retinopathy to prevent progression to **vitreous hemorrhage** or **tractional retinal detachment**. - **Note**: Intravitreal anti-VEGF therapy (bevacizumab, ranibizumab, aflibercept) is also highly effective for PDR and may be used as an alternative or adjunct to PRP in current practice. *Focal laser treatment* - **Focal laser photocoagulation** primarily targets specific leaking microaneurysms in the macula to treat **diabetic macular edema (DME)**, which causes central vision loss. - It is not the primary treatment for proliferative retinopathy where new blood vessel growth (neovascularization) is the main concern. *Vitrectomy* - **Vitrectomy** is a surgical procedure performed to remove blood from a **vitreous hemorrhage** or to repair a **tractional retinal detachment** that has already occurred as a complication of advanced proliferative diabetic retinopathy. - While effective for these complications, it is a surgical intervention for existing damage rather than a primary preventative treatment to reduce the risk of initial severe vision loss from developing PDR. *Intravitreal corticosteroids* - **Intravitreal corticosteroids** are typically used to treat **diabetic macular edema (DME)**, especially in cases unresponsive to anti-VEGF therapy. - While they can reduce inflammation and leakage, they are not the primary treatment for preventing the progression of neovascularization in proliferative diabetic retinopathy.

Question 1

A 75-year-old male with a history of atrial fibrillation presents with sudden vision loss in the right eye. Fundoscopy reveals a cherry-red spot in the macula. Analyze the clinical findings and determine the most appropriate next step in management.

Accepted Answer

Immediate ophthalmology consultation

Answer

Intravenous tissue plasminogen activator

Answer

Emergent carotid endarterectomy

Answer

Intra-arterial thrombolysis

Question 2

A 65-year-old patient presents with acute vision loss and is diagnosed with central retinal artery occlusion. What is the most appropriate immediate intervention to attempt to restore vision?

Accepted Answer

Ocular massage

Answer

Laser photocoagulation

Answer

Intravitreal injection of anti-VEGF

Answer

Intravenous thrombolysis

Question 3

A 5-year-old child is brought in with leukocoria and a family history of ocular tumors. Fundus examination reveals a white mass. What is the most likely diagnosis?

Accepted Answer

Retinoblastoma

Answer

Congenital cataract

Answer

Coats' disease

Answer

Persistent hyperplastic primary vitreous

Question 4

A 55-year-old male with a history of diabetes presents with progressive vision loss. Fundoscopy reveals neovascularization of the disc and vitreous hemorrhage. What is the most appropriate treatment?

Accepted Answer

Panretinal photocoagulation

Answer

Intravitreal anti-VEGF injection

Answer

Focal laser photocoagulation

Answer

Vitrectomy

Question 5

A patient with a history of diabetes presents with sudden vision loss and a "shower of floaters." Fundoscopy reveals a dense vitreous hemorrhage. What is the immediate next step in management?

Accepted Answer

Vitrectomy

Answer

Observation

Answer

Panretinal photocoagulation

Answer

Intravitreal anti-VEGF injection

Question 6

A patient presents with a sudden onset of flashes of light and a curtain falling over his vision. Fundoscopy reveals a retinal detachment. What is the most appropriate next step in management?

Accepted Answer

Vitrectomy

Answer

Laser photocoagulation

Answer

Cryopexy

Answer

Pneumatic retinopexy

Question 7

Which diagnostic test is the most sensitive for detecting early diabetic macular edema?

Accepted Answer

Optical coherence tomography

Answer

Fluorescein angiography

Answer

Ultrasound B-scan

Answer

Visual field testing

Question 8

A 60-year-old patient with age-related macular degeneration presents with a sudden onset of central vision loss. Fundoscopy reveals subretinal hemorrhage. What is the recommended treatment?

Accepted Answer

Intravitreal anti-VEGF injection

Answer

Laser photocoagulation

Answer

Intravitreal corticosteroids

Answer

Observation

Question 9

A diabetic patient presents with blurred vision. Fundoscopy reveals microaneurysms, dot-blot hemorrhages, and hard exudates in the macular region. OCT confirms center-involving diabetic macular edema. What is the most appropriate next step in management?

Accepted Answer

Intravitreal anti-VEGF injection

Answer

Panretinal photocoagulation

Answer

Focal laser treatment

Answer

Vitrectomy

Question 10

A 45-year-old woman with diabetes presents with worsening vision. Fundoscopy reveals proliferative diabetic retinopathy. Which treatment option has been shown to be effective in reducing the risk of severe vision loss?

Accepted Answer

Panretinal photocoagulation

Answer

Focal laser treatment

Answer

Vitrectomy

Answer

Intravitreal corticosteroids

Diseases of the Retina — MCQs

Diseases of the Retina — MCQs

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