Ocular Manifestations of Systemic Disorders Practice Questions

Q: Which of the following metabolic disorders is associated with the fundoscopic finding shown in the image?

Mitochondrial disorders. ***Mitochondrial disorders*** - **Salt-and-pepper pigmentary retinopathy** is a characteristic fundoscopic finding in mitochondrial disorders, particularly **Kearns-Sayre syndrome**. - These disorders affect retinal pigment epithelium function due to **mitochondrial dysfunction**, leading to scattered pigmentary changes throughout the fundus. *Galactosemia* - Primarily causes **oil-droplet cataracts** in the anterior segment, not posterior segment fundoscopic changes. - Fundoscopic examination is typically **normal** unless secondary complications develop from untreated disease. *Albinism* - Characterized by **hypopigmented fundus** with visible choroidal vessels and **foveal hypoplasia**. - Does not produce the salt-and-pepper pigmentary pattern seen in mitochondrial disorders. *GM1 Gangliosidosis* - Classic fundoscopic finding is a **cherry-red spot** in the macula due to ganglioside accumulation. - This presents as a well-defined red central area, distinctly different from diffuse pigmentary retinopathy.

Q: What is the most common ocular manifestation in rheumatoid arthritis?

Keratoconjunctivitis sicca. **Explanation:** **Keratoconjunctivitis sicca (KCS)**, or secondary Sjögren’s syndrome, is the **most common** ocular manifestation of Rheumatoid Arthritis (RA), occurring in approximately 15–25% of patients. It results from immune-mediated destruction of the lacrimal glands, leading to aqueous tear deficiency. Patients typically present with a foreign body sensation, burning, and dryness. **Analysis of Options:** * **B. Episcleritis:** This is the most common **inflammatory** complication of the sclera/episclera in RA, but its overall prevalence is lower than KCS. It is usually benign and self-limiting. * **A. Scleritis:** While RA is the most common systemic cause of scleritis (especially necrotizing scleritis), it is less frequent than both KCS and episcleritis. Its presence often indicates high systemic disease activity and a poor prognosis. * **D. Anterior Uveitis:** This is more characteristically associated with Seronegative Spondyloarthropathies (like Ankylosing Spondylitis) rather than Rheumatoid Arthritis. **High-Yield Clinical Pearls for NEET-PG:** * **Most common ocular finding:** Keratoconjunctivitis sicca. * **Most specific/serious ocular finding:** Necrotizing scleritis (Scleromalacia perforans), which occurs in long-standing RA and is characterized by painless thinning of the sclera without inflammation. * **Drug-induced toxicity:** Patients on Hydroxychloroquine (HCQ) for RA require baseline and periodic screening for **"Bull’s eye maculopathy."** * **Peripheral Ulcerative Keratitis (PUK):** A serious "melting" of the cornea that can occur in severe RA.

Q: Bilateral skin depigmentation, chronic uveitis, and tinnitus are features of which syndrome?

Vogt-Koyanagi-Harada syndrome. **Explanation:** **Vogt-Koyanagi-Harada (VKH) Syndrome** is a multisystem autoimmune disorder directed against melanocyte-containing tissues, primarily affecting the eyes, ears, skin, and meninges. It typically presents in four stages: 1. **Prodromal:** Meningismus and tinnitus. 2. **Uveitic:** Bilateral granulomatous panuveitis with exudative retinal detachments. 3. **Chronic (Convalescent):** Depigmentation of the choroid (**"Sunset glow fundus"**) and skin (vitiligo, poliosis, and alopecia). 4. **Chronic Recurrent:** Smoldering anterior uveitis. The triad of bilateral uveitis, auditory symptoms (tinnitus/hearing loss), and integumentary changes (vitiligo) is pathognomonic for VKH. **Why the other options are incorrect:** * **Waardenburg Syndrome:** A genetic disorder characterized by sensorineural deafness and pigmentary anomalies (white forelock, heterochromia iridis), but it **does not** cause uveitis. * **Alport Syndrome:** A basement membrane disorder (Type IV Collagen mutation) presenting with sensorineural deafness and renal failure. Ocular signs include **anterior lenticonus** and dot-and-fleck retinopathy, not uveitis or vitiligo. * **Werner Syndrome:** A progeroid (premature aging) syndrome. Key features include bilateral cataracts, scleroderma-like skin changes, and short stature, but not chronic uveitis. **High-Yield Clinical Pearls for NEET-PG:** * **Sunset Glow Fundus:** A classic sign of the chronic stage of VKH due to depigmentation. * **Sugiura’s Sign:** Perilimbal vitiligo (depigmentation of the limbus), seen in the convalescent stage. * **Dalen-Fuchs Nodules:** Small, yellow-white granulomatous lesions between the RPE and Bruch’s membrane (also seen in Sympathetic Ophthalmitis). * **Treatment:** High-dose systemic corticosteroids are the mainstay of therapy.

Q: What is the diagnosis in this 31-year-old woman with gradual bilateral vision loss?

Marfan's syndrome. ***Marfan's syndrome*** - **Ectopia lentis** (lens subluxation) is the hallmark ocular finding, typically occurring **superotemporal**, causing gradual bilateral vision loss in young adults. - Associated with **high myopia** and increased risk of **retinal detachment**, along with systemic connective tissue features like **arachnodactyly** and **aortic dilatation**. *Glaucoma* - Presents with **elevated intraocular pressure** and **optic nerve cupping**, typically affecting older patients. - Vision loss is usually **peripheral initially** with characteristic **visual field defects**, not gradual central vision loss in a young adult. *Graves' ophthalmopathy* - Associated with **thyroid dysfunction** and presents with **exophthalmos**, **lid retraction**, and **diplopia**. - Vision loss is typically due to **compressive optic neuropathy** rather than gradual bilateral deterioration, and occurs in the context of hyperthyroidism. *Retinitis pigmentosa* - Characterized by **bone spicule pigmentation** on fundoscopy and **night blindness** as an early symptom. - Lacks the **systemic connective tissue features** of Marfan's syndrome and typically presents with **ring scotomas** rather than lens-related vision loss.

Q: Which of the following is NOT an ophthalmic finding of acute meningococcal meningitis?

Glaucoma. **Explanation:** Acute meningococcal meningitis is a systemic bacterial infection caused by *Neisseria meningitidis* that leads to severe inflammation of the leptomeninges and increased intracranial pressure (ICP). **Why Glaucoma is the correct answer:** Glaucoma is a group of eye conditions that damage the optic nerve, usually associated with increased intraocular pressure (IOP). It is **not** a feature of acute meningitis. While meningitis involves increased *intracranial* pressure, this does not translate to an increase in *intraocular* pressure. Therefore, glaucoma is the "odd one out" in this clinical context. **Analysis of other options:** * **Ocular motility palsy (Option A):** Increased ICP can lead to false-localizing signs, most commonly a **6th cranial nerve (Abducens)** palsy. Additionally, direct inflammation at the base of the brain can affect CN III, IV, and VI. * **Papilloedema (Option B):** This is a classic sign of raised ICP. The high pressure is transmitted through the subarachnoid space to the optic nerve sheath, causing axonal transport stasis and disc swelling. * **Optic neuritis (Option C):** Direct spread of infection or an immune-mediated inflammatory response can lead to optic nerve involvement (meningitic optic neuritis), resulting in visual loss. **NEET-PG High-Yield Pearls:** 1. **Endophthalmitis:** Metastatic endophthalmitis is a rare but severe complication of meningococcemia where bacteria seed the uveal tract. 2. **6th Nerve Palsy:** Always remember that the Abducens nerve has the longest intracranial course, making it highly susceptible to "stretch" in cases of raised ICP (Meningitis, Tumors). 3. **Uveitis:** Acute purulent uveitis can occur during the septicemic phase of the disease.

Q: Which of the following is true about heterochromic uveitis?

Involves the anterior part of the iris. **Explanation:** **Fuchs’ Heterochromic Iridocyclitis (FHI)** is a chronic, low-grade, non-granulomatous uveitis characterized by a classic triad of heterochromia, cataract, and glaucoma. **Why Option B is Correct:** The primary pathology in FHI involves **atrophy of the iris stroma**, which is located in the **anterior part of the iris**. This stromal atrophy leads to a loss of pigment, making the iris appear lighter (hypochromia) in brown-eyed individuals or revealing the underlying pigment epithelium, making it appear darker in blue-eyed individuals. The loss of the normal iris pattern and the presence of fine, stellate keratic precipitates (KPs) across the entire corneal endothelium are hallmark features. **Why Other Options are Incorrect:** * **Option A & C:** The disease primarily affects the anterior segment (iris stroma and anterior chamber). While vitreous opacities can occur, the defining structural change is not localized to the posterior surface of the iris or the posterior chamber. * **Option D:** A defining negative feature of FHI is the **absence of posterior synechiae**, despite the presence of chronic inflammation. This is a high-yield point for differentiating FHI from other forms of anterior uveitis. **High-Yield Clinical Pearls for NEET-PG:** * **Amsler’s Sign:** Development of a filiform hyphema following anterior chamber paracentesis or minor trauma (due to fragile neovascularization at the angle). * **Steroid Response:** Unlike other uveitis, the inflammation in FHI does **not** respond well to topical steroids and usually does not require them. * **Cataract:** Posterior subcapsular cataract is very common. * **Glaucoma:** Secondary open-angle glaucoma is a frequent and serious complication. * **KPs:** Characteristically small, round, or stellate, and distributed over the **entire** endothelium (not just Arlt’s triangle).

Q: Wilson's disease is characterized by all of the following EXCEPT:

Glaucoma. **Explanation:** Wilson’s disease (Hepatolenticular degeneration) is an autosomal recessive disorder of copper metabolism caused by a mutation in the **ATP7B gene**. This results in decreased biliary excretion of copper and its subsequent deposition in various organs, primarily the liver, brain, and eyes. **Why Glaucoma is the correct answer:** Glaucoma is **not** a characteristic feature of Wilson’s disease. While copper deposits in various ocular structures, it does not typically obstruct aqueous outflow or cause optic nerve damage leading to glaucoma. **Analysis of other options:** * **Kayser-Fleischer (KF) Ring:** This is the hallmark ocular sign. It consists of golden-brown or greenish-brown copper deposits in the **Descemet’s membrane** of the peripheral cornea. It is present in 95% of patients with neurological symptoms. * **Sunflower Cataract:** This occurs due to copper deposition in the **anterior lens capsule**. It appears as a central disc with radiating petal-like spokes. Unlike senile cataracts, it rarely impairs vision significantly. * **Nystagmus:** Wilson’s disease involves the basal ganglia and cerebellum. Neurological involvement can manifest as various movement disorders, including tremors, ataxia, and occasionally nystagmus or ocular motility disturbances. **High-Yield Clinical Pearls for NEET-PG:** * **KF Ring Location:** Starts at the 12 o’clock and 6 o’clock positions before becoming circumferential. * **Reversibility:** Both KF rings and Sunflower cataracts may disappear with systemic chelation therapy (e.g., D-penicillamine). * **Diagnosis:** Best visualized using a **Slit-lamp examination**; it may be invisible to the naked eye in early stages. * **Systemic Triad:** Liver cirrhosis, Basal ganglia degeneration, and KF ring.

Q: Which of the following is NOT an ocular complication of diabetes mellitus?

Neuroparalytic keratitis. **Explanation:** The correct answer is **Neuroparalytic keratitis**. This condition occurs due to a loss of sensory innervation to the cornea (Trigeminal nerve/CN V palsy), leading to anesthesia and subsequent epithelial breakdown. While diabetes causes various neuropathies, it typically presents with **neurotrophic keratopathy** (reduced corneal sensitivity) rather than true neuroparalytic keratitis, which is more commonly associated with surgical trauma, tumors (Acoustic neuroma), or Herpes Zoster. **Analysis of Options:** * **Cataract:** Diabetes is a major risk factor. It can cause "True Diabetic Cataract" (Snowflake cataracts) due to osmotic swelling from sorbitol accumulation, or accelerate the onset of senile cataracts. * **Retinopathy:** Diabetic Retinopathy (DR) is the most common microvascular complication. It involves basement membrane thickening and pericyte loss, leading to microaneurysms, hemorrhages, and neovascularization. * **Anterior Ischemic Optic Neuropathy (AION):** Diabetes causes microvascular insufficiency. Non-arteritic AION is significantly more common in diabetics due to compromised prelaminar splenic circulation. **High-Yield Clinical Pearls for NEET-PG:** * **Ocular Palsies:** Diabetes is the most common cause of **isolated 3rd nerve palsy** (pupil-sparing) due to microvascular ischemia of the nerve trunk. * **Refractive Changes:** Hyperglycemia causes sudden **myopia** (due to lens swelling), while a sudden drop in blood sugar can cause **hypermetropia**. * **Neovascular Glaucoma (NVG):** A serious complication of proliferative diabetic retinopathy (PDR) where new vessels grow on the iris (Rubeosis iridis). * **Sorbitol Pathway:** The enzyme **Aldose Reductase** converts glucose to sorbitol, which is the primary biochemical culprit in diabetic cataract formation.

Question 1

Which of the following metabolic disorders is associated with the fundoscopic finding shown in the image?

Accepted Answer

Mitochondrial disorders

Answer

Galactosemia

Answer

Albinism

Answer

GM1 Gangliosidosis

Question 2

A 68-year-old woman with a history of left ventricular congestive heart failure has had decreased visual acuity for the past 5 years. She has no ocular pain and her intraocular pressure is normal. Funduscopic examination reveals arteriolar narrowing, flame-shaped hemorrhages, cotton-wool spots, and hard, waxy exudates. Which of the following underlying diseases is she most likely to have?

Accepted Answer

Hypertension

Answer

Advanced atherosclerosis

Answer

Cerebral edema

Answer

Diabetes mellitus

Question 3

What is the most common ocular manifestation in rheumatoid arthritis?

Accepted Answer

Keratoconjunctivitis sicca

Answer

Scleritis

Answer

Episcleritis

Answer

Anterior uveitis

Question 4

Significant loss of vision in a patient with hypertension can occur due to all of the following, except?

Accepted Answer

Papilledema

Answer

Occipital infarct

Answer

Anterior ischemic optic neuropathy

Answer

Retinal hemorrhage

Question 5

Bilateral skin depigmentation, chronic uveitis, and tinnitus are features of which syndrome?

Accepted Answer

Vogt-Koyanagi-Harada syndrome

Answer

Waardenburg syndrome

Answer

Alport syndrome

Answer

Werner syndrome

Question 6

What is the diagnosis in this 31-year-old woman with gradual bilateral vision loss?

Accepted Answer

Marfan's syndrome

Answer

Glaucoma

Answer

Graves' ophthalmopathy

Answer

Retinitis pigmentosa

Question 7

Which of the following is NOT an ophthalmic finding of acute meningococcal meningitis?

Accepted Answer

Glaucoma

Answer

Ocular motility palsy

Answer

Papilloedema

Answer

Optic neuritis

Question 8

Which of the following is true about heterochromic uveitis?

Accepted Answer

Involves the anterior part of the iris

Answer

Involves the posterior surface of the iris

Answer

Involves the posterior chamber

Answer

Posterior synechiae

Question 9

Wilson's disease is characterized by all of the following EXCEPT:

Accepted Answer

Glaucoma

Answer

Kayser-Fleischer ring

Answer

Sunflower cataract

Answer

Nystagmus

Question 10

Which of the following is NOT an ocular complication of diabetes mellitus?

Accepted Answer

Neuroparalytic keratitis

Answer

Cataract

Answer

Retinopathy

Answer

Anterior ischemic neuropathy

Ocular Manifestations of Systemic Disorders — MCQs

Ocular Manifestations of Systemic Disorders — MCQs

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