Ocular Manifestations of Systemic Disorders Practice Questions

Q: What is the most common eye manifestation in Sturge-Weber syndrome?

Glaucoma. **Explanation:** Sturge-Weber Syndrome (Encephalotrigeminal Angiomatosis) is a neurocutaneous disorder characterized by a facial port-wine stain (nevus flammeus), leptomeningeal angiomas, and ocular involvement. **Why Glaucoma is the Correct Answer:** Glaucoma is the most common and significant ocular manifestation, occurring in approximately 30–70% of patients. The pathophysiology is dual-mechanism: 1. **In infants/children:** It is often due to an anomalous anterior chamber angle (similar to congenital glaucoma). 2. **In adults:** It is primarily caused by **increased episcleral venous pressure** due to underlying episcleral or conjunctival hemangiomas. *Note: Diffuse choroidal hemangioma ("Tomato-catsup fundus") is another classic sign, but glaucoma remains the most frequent complication.* **Why Incorrect Options are Wrong:** * **Keratitis:** This is an inflammation of the cornea. While patients with SWS may rarely develop exposure keratitis if they have severe proptosis or lid abnormalities, it is not a characteristic or common feature of the syndrome. * **Uveitis:** SWS is a vascular malformation syndrome, not an inflammatory condition. Uveitis is not associated with this phakomatosis. * **Retinitis Pigmentosa:** This is a genetic degenerative disease of the photoreceptors. SWS involves vascular hamartomas, not primary retinal degeneration. **High-Yield Clinical Pearls for NEET-PG:** * **Port-wine stain:** Most commonly involves the distribution of the **Ophthalmic (V1)** and Maxillary (V2) branches of the Trigeminal nerve. * **Tomato-catsup fundus:** Refers to the appearance of diffuse choroidal hemangioma. * **Radiology:** "Tram-track" calcifications on CT/X-ray due to leptomeningeal angiomatosis. * **Management:** Glaucoma in SWS is notoriously difficult to treat; medical management is tried first, but surgical intervention (like GDD or trabeculectomy) is often required.

Q: Roth's spots in the fundus are typically seen in which of the following conditions?

Bacterial endocarditis. **Explanation:** **Roth’s spots** are a classic ophthalmic finding characterized by **retinal hemorrhages with a central white or pale spot**. 1. **Why Bacterial Endocarditis is Correct:** In Subacute Bacterial Endocarditis (SBE), these spots were historically attributed to septic emboli. However, the underlying pathophysiology is actually a **Type III hypersensitivity reaction** (immune-complex mediated). This leads to focal retinal capillary rupture (hemorrhage) followed by the accumulation of inflammatory cells, fibrin, and platelets at the site of the rupture, which forms the characteristic white center. 2. **Why Other Options are Incorrect:** * **Diabetes Mellitus:** Characterized by microaneurysms, hard exudates, and dot-blot hemorrhages, but not typically Roth's spots. * **Chorioretinitis:** Presents with focal inflammation of the choroid and retina (e.g., "headlight in the fog" in Toxoplasmosis), rather than discrete white-centered hemorrhages. * **Retinoblastoma:** Presents with leukocoria (white pupillary reflex) and a calcified intraocular mass, not superficial retinal hemorrhages. **High-Yield Clinical Pearls for NEET-PG:** * **Differential Diagnosis for Roth’s Spots:** While classic for SBE, they are **not pathognomonic**. They are also seen in: * Leukemia (most common cause of white-centered hemorrhages) * Severe Anemia * Hypertension * HIV Retinopathy * Carbon Monoxide poisoning * **Composition:** The white center is composed of **fibrin-platelet thrombi**, not pus or organisms. * **Exam Tip:** If a question mentions a patient with a "new heart murmur, fever, and white-centered retinal spots," always prioritize Bacterial Endocarditis.

Q: What is the ocular symptom of Von Recklinghausen disease?

Glaucoma. **Explanation:** **Von Recklinghausen disease**, also known as **Neurofibromatosis Type 1 (NF1)**, is a multisystem neuroectodermal disorder. The most characteristic ocular association of NF1 is **Glaucoma**, which occurs in approximately 1/300 cases. It is typically unilateral and congenital or infantile in onset. The pathogenesis is multifactorial, involving: 1. Infiltration of the anterior chamber angle by neurofibromatomatous tissue. 2. Developmental anomalies of the angle (similar to primary congenital glaucoma). 3. Secondary angle closure due to neurofibromas of the ciliary body or iris. **Analysis of Incorrect Options:** * **Option A:** While the anterior chamber may be shallow in cases of ciliary body neurofibromas, "deformed anterior chamber" is not a specific clinical descriptor for NF1. * **Option C:** **Choroidal hemangioma** is a classic feature of **Sturge-Weber Syndrome** (Encephalotrigeminal Angiomatosis), not NF1. NF1 is instead associated with Lisch nodules and occasionally choroidal nevi or hamartomas. * **Option D:** Subretinal neovascularization is not a primary feature of NF1; it is more commonly associated with conditions like Age-Related Macular Degeneration (ARMD) or high myopia. **High-Yield Clinical Pearls for NEET-PG:** * **Lisch Nodules:** Melanocytic hamartomas of the iris; the most common ocular finding in NF1 (present in >95% of adults). * **Plexiform Neurofibroma:** Described as a "bag of worms" sensation on palpation of the eyelid; often associated with an S-shaped ptosis. * **Optic Nerve Glioma:** A common CNS tumor in NF1; usually presents as painless axial proptosis and vision loss in children. * **Sphenoid Wing Dysplasia:** A skeletal hallmark that can lead to pulsating exophthalmos.

Q: What is the most common ocular involvement in sarcoidosis?

Iritis. **Explanation:** Sarcoidosis is a multisystem granulomatous disease characterized by non-caseating granulomas. Ocular involvement occurs in approximately 25–50% of patients, and **Anterior Uveitis (Iritis/Iridocyclitis)** is the most common manifestation. * **Why Iritis is Correct:** The hallmark of ocular sarcoidosis is a bilateral, chronic granulomatous anterior uveitis. Clinically, this presents with "mutton-fat" keratic precipitates (KPs) on the corneal endothelium and Iris nodules (Koeppe and Busacca nodules). While sarcoidosis can affect any part of the eye (panuveitis), the anterior segment is the most frequent site of inflammation. * **Why Incorrect Options are Wrong:** * **Keratitis:** While sarcoidosis can cause Keratoconjunctivitis Sicca (dry eye) due to lacrimal gland involvement, primary inflammation of the cornea (keratitis) is rare. * **Cataract:** This is typically a **secondary complication** of chronic intraocular inflammation or prolonged corticosteroid therapy used to treat sarcoidosis, rather than a primary manifestation. * **Glaucoma:** Similar to cataracts, glaucoma in sarcoidosis is usually secondary, resulting from trabeculitis, peripheral anterior synechiae (PAS), or steroid use. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Triad:** Bilateral hilar lymphadenopathy (on CXR), elevated Serum ACE levels, and granulomatous uveitis. * **Fundus Findings:** "Candle-wax drippings" (perivascular sheathing/chorioretinitis). * **Lofgren Syndrome:** Erythema nodosum, bilateral hilar lymphadenopathy, and arthralgia (often associated with acute uveitis). * **Heerfordt Syndrome (Uveoparotid Fever):** Uveitis, Parotitis, Facial nerve palsy, and Fever.

Q: Vitamin A deficiency is characterized by all EXCEPT:

Tranta's spot. **Explanation:** The correct answer is **D. Tranta’s spot**. **Tranta’s spots** (also known as Horner-Tranta’s spots) are small, white, chalky elevated dots found at the limbus. They are a hallmark clinical feature of **Vernal Keratoconjunctivitis (VKC)**, a type of allergic conjunctivitis, and are composed of eosinophils and epithelial debris. They are not associated with Vitamin A deficiency. **Analysis of Incorrect Options:** * **Night Blindness (Nyctalopia):** This is the **earliest clinical symptom** of Vitamin A deficiency. It occurs due to the failure of rhodopsin regeneration in the retinal rods. * **Xerophthalmia:** This is a spectrum of ocular diseases caused by Vitamin A deficiency, ranging from night blindness to keratomalacia. It literally translates to "dry eye." * **Bitot’s Spot:** This is a **pathognomonic sign** of Vitamin A deficiency. These are triangular, foamy, silvery-white patches on the bulbar conjunctiva (usually temporal) caused by squamous metaplasia and keratinization of the conjunctival epithelium. **High-Yield Clinical Pearls for NEET-PG:** * **WHO Classification of Xerophthalmia:** * **X1A:** Conjunctival xerosis * **X1B:** Bitot’s spots * **X2:** Corneal xerosis * **X3A/X3B:** Corneal ulceration/Keratomalacia ( 1/3 of corneal surface) * **XS:** Corneal scar * **XF:** Xerophthalmic fundus * **First Sign:** Conjunctival xerosis. * **First Symptom:** Night blindness. * **Treatment:** For children >1 year, the standard dose is 200,000 IU of Vitamin A orally on days 0, 1, and 14.

Q: What is the most common ophthalmological manifestation of the X-linked form of Alport syndrome?

Dot and flake retinopathy. **Explanation:** Alport syndrome is a genetic disorder caused by mutations in the genes encoding **Type IV collagen** (specifically the $\alpha$3, $\alpha$4, and $\alpha$5 chains), which is a vital structural component of basement membranes in the kidney, inner ear, and eye. **1. Why "Dot and flake retinopathy" is correct:** While anterior lenticonus is the most *pathognomonic* (specific) sign, **dot and flake retinopathy** is the **most common** ocular manifestation, occurring in approximately 85% of affected males with the X-linked form. It presents as bilateral, tiny, white or yellow-white punctate lesions in the perimacular or peripheral retina. These lesions are usually asymptomatic and do not affect visual acuity. **2. Analysis of Incorrect Options:** * **B. Anterior lenticonus:** This is a highly specific (pathognomonic) feature where the lens capsule thins and bulges forward. However, it occurs in only about 25% of cases, making it less common than retinopathy. * **C. Posterior polymorphous corneal dystrophy (PPCD):** While associated with Alport syndrome due to basement membrane abnormalities in the cornea, it is a rare finding compared to retinal changes. * **D. Posterior lenticonus:** This is typically associated with **Lowe syndrome** or is idiopathic/congenital; it is not a characteristic feature of Alport syndrome. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Triad:** Hereditary nephritis (sensorineural deafness), sensorineural hearing loss, and ocular anomalies. * **Inheritance:** Most common is **X-linked dominant** (COL4A5 mutation). * **Vision Impact:** Retinopathy is asymptomatic; vision loss in Alport is usually due to progressive **high myopia** or oil-droplet configuration of the lens from anterior lenticonus. * **Management:** Anterior lenticonus is treated with clear lens extraction and IOL implantation if vision is significantly impaired.

Q: In complete albinism, what is the colour of the iris?

Pink. **Explanation:** In **complete oculocutaneous albinism**, there is a congenital deficiency of the enzyme **tyrosinase**, leading to a total absence of melanin pigment in the skin, hair, and eyes. **Why Pink is the correct answer:** The iris in albinism is not inherently pink; rather, it is **translucent** due to the lack of pigment in the iris stroma and the posterior pigment epithelium. The pink or reddish appearance is a result of **retro-illumination**, where light reflects off the highly vascularized choroid and retina. This allows the underlying blood vessels to be visible through the thin, depigmented iris tissue. **Analysis of Incorrect Options:** * **White:** While the skin and hair appear white, the iris appears pink/red due to vascular reflection. * **Black:** This indicates high melanin density, the exact opposite of albinism. * **Blue:** Blue eyes occur when there is low melanin (Tyndall effect), but in *complete* albinism, the total absence of pigment prevents even a blue appearance, resulting in translucency. **High-Yield Clinical Pearls for NEET-PG:** * **Iris Transillumination Defects:** A hallmark clinical sign where the iris glows red when light is shone into the eye. * **Foveal Hypoplasia:** The most common cause of permanent visual loss in albinos (lack of xanthophyll pigment and poor development of the fovea). * **Nystagmus and Photophobia:** Common due to light scattering and poor macular development. * **Misrouting of Optic Nerve Fibers:** Increased decussation of nerve fibers at the optic chiasm (more than the normal 53% cross to the contralateral side).

Q: Ocular manifestations of vitamin D deficiency include:

All of the above. **Explanation:** Vitamin D plays a crucial role in calcium homeostasis. Deficiency leads to hypocalcemia, which manifests in the eye through several distinct mechanisms: 1. **Zonular (Lamellar) Cataract:** This is the most characteristic ocular finding. Hypocalcemia alters the permeability of the lens capsule and interferes with the electrolyte balance of the lens fibers. This results in opacification of specific layers (zones) of the lens, typically occurring during periods of active deficiency. 2. **Papilledema:** Severe Vitamin D deficiency and associated hypoparathyroidism can lead to increased intracranial pressure (pseudotumor cerebri). This manifests clinically as bilateral optic disc swelling (papilledema). 3. **Increased Lacrimation:** Hypocalcemia can cause neuromuscular irritability and autonomic dysfunction, leading to reflex tearing or hyperlacrimation. **Clinical Pearls for NEET-PG:** * **Zonular Cataract** is the most common type of congenital/infantile cataract. It is typically bilateral and symmetric, often described as "riders" (opacities extending from the equator). * **Hypocalcemic Tetany:** Always look for signs like Chvostek’s and Trousseau’s signs in a patient presenting with these ocular features. * **Differential Diagnosis:** While Vitamin A deficiency is famous for Bitot’s spots and Xerophthalmia, Vitamin D deficiency is high-yield for its association with **cataracts** and **raised ICP**. * **Other findings:** Photophobia and blepharospasm may also be seen due to ocular surface irritability. Since all three listed manifestations are documented consequences of Vitamin D deficiency/hypocalcemia, **Option D** is the correct answer.

Q: In Von Hippel-Lindau Syndrome, retinal vascular tumors are often associated with intracranial hemangioblastoma. Which one of the following regions is associated with such vascular abnormalities in this syndrome?

Cerebellum. **Explanation:** **Von Hippel-Lindau (VHL) Syndrome** is an autosomal dominant multisystem disorder caused by a mutation in the VHL gene on chromosome 3p. It is characterized by the development of benign and malignant tumors, most notably **hemangioblastomas**. 1. **Why Cerebellum is Correct:** In VHL, the most common site for intracranial hemangioblastomas is the **cerebellum** (occurring in up to 60-70% of patients), followed by the spinal cord and brainstem. These are highly vascular, slow-growing tumors. The classic clinical triad of VHL includes retinal hemangioblastomas (Von Hippel tumors), cerebellar hemangioblastomas (Lindau tumors), and visceral cysts/carcinomas (e.g., Renal Cell Carcinoma). 2. **Why Other Options are Incorrect:** * **Optic Radiation, Optic Tract, and Pulvinar:** While VHL can involve the central nervous system, hemangioblastomas have a strong predilection for the **posterior fossa** (cerebellum) and spinal cord. They do not typically occur in the supratentorial visual pathways (optic tract/radiations) or the thalamus (pulvinar). **High-Yield Clinical Pearls for NEET-PG:** * **Retinal Manifestation:** Retinal capillary hemangioblastoma is often the first sign of VHL. It appears as a red, globular lesion with a **dilated, tortuous feeder artery** and a draining vein. * **Associated Visceral Lesions:** Renal Cell Carcinoma (clear cell type), Pheochromocytoma, and Pancreatic cysts/neuroendocrine tumors. * **Genetics:** Mutation in the **VHL tumor suppressor gene (3p25.3)**. * **Screening:** Patients require lifelong surveillance, including annual ophthalmoscopy and periodic MRI of the brain and abdomen.

Q: What is a common ocular consequence of a sudden increase in blood sugar in a diabetic patient?

Myopia. **Explanation:** The correct answer is **Myopia**. This phenomenon is a classic high-yield concept in ocular manifestations of diabetes mellitus. **1. Why Myopia is Correct:** When blood glucose levels rise suddenly (hyperglycemia), there is a corresponding increase in the glucose concentration within the aqueous humor. This glucose diffuses into the crystalline lens, where it is converted into **sorbitol** by the enzyme aldose reductase. Sorbitol is osmotically active and cannot easily exit the lens, leading to an influx of water. This causes **lenticular swelling (hydration)**, which increases the curvature of the lens and its refractive index. The increased refractive power shifts the light focus in front of the retina, resulting in **index myopia**. **2. Why Other Options are Incorrect:** * **Hypermetropia:** While sudden *decreases* in blood sugar (during treatment or stabilization) can lead to a hypermetropic shift due to lens dehydration, acute *increases* consistently cause myopia. * **Presbyopia:** This is an age-related loss of accommodation due to lens hardening. While diabetics may develop presbyopia earlier, it is not an acute consequence of a blood sugar spike. * **Anisometropia:** This refers to a significant difference in refractive power between the two eyes. Hyperglycemic changes are typically bilateral and symmetrical. **Clinical Pearls for NEET-PG:** * **Rule of Thumb:** "Sugar goes up, vision goes Myopic; Sugar goes down, vision goes Hypermetropic." * **Clinical Management:** Never prescribe new spectacles to a diabetic patient until their blood sugar has been stable for at least **4–6 weeks**, as the refractive error is reversible. * **Cataract Link:** This same osmotic mechanism (sorbitol accumulation) is responsible for the formation of **Snowflake Cataracts** in juvenile diabetics.

Question 1

What is the most common eye manifestation in Sturge-Weber syndrome?

Accepted Answer

Glaucoma

Answer

Keratitis

Answer

Uveitis

Answer

Retinitis pigmentosa

Question 2

Roth's spots in the fundus are typically seen in which of the following conditions?

Accepted Answer

Bacterial endocarditis

Answer

Diabetes mellitus

Answer

Chorioretinitis

Answer

Retinoblastoma

Question 3

What is the ocular symptom of Von Recklinghausen disease?

Accepted Answer

Glaucoma

Answer

Deformed anterior chamber with reduced angle of AC

Answer

Choroidal hemangioma

Answer

Subretinal neovascularization

Question 4

What is the most common ocular involvement in sarcoidosis?

Accepted Answer

Iritis

Answer

Keratitis

Answer

Cataract

Answer

Glaucoma

Question 5

Vitamin A deficiency is characterized by all EXCEPT:

Accepted Answer

Tranta's spot

Answer

Bitot's spot

Answer

Xerophthalmia

Answer

Night blindness

Question 6

What is the most common ophthalmological manifestation of the X-linked form of Alport syndrome?

Accepted Answer

Dot and flake retinopathy

Answer

Anterior lenticonus

Answer

Posterior polymorphous corneal dystrophy

Answer

Posterior lenticonus

Question 7

In complete albinism, what is the colour of the iris?

Accepted Answer

Pink

Answer

White

Answer

Black

Answer

Blue

Question 8

Ocular manifestations of vitamin D deficiency include:

Accepted Answer

All of the above

Answer

Zonular cataract

Answer

Papilledema

Answer

Increased lacrimation

Question 9

In Von Hippel-Lindau Syndrome, retinal vascular tumors are often associated with intracranial hemangioblastoma. Which one of the following regions is associated with such vascular abnormalities in this syndrome?

Accepted Answer

Cerebellum

Answer

Optic radiation

Answer

Optic tract

Answer

Pulvinar

Question 10

What is a common ocular consequence of a sudden increase in blood sugar in a diabetic patient?

Accepted Answer

Myopia

Answer

Hypermetropia

Answer

Presbyopia

Answer

Anisometropia

Ocular Manifestations of Systemic Disorders — MCQs

Ocular Manifestations of Systemic Disorders — MCQs

On this page

Practice by Chapter

Want unlimited practice?