Ocular Manifestations of Systemic Disorders Practice Questions

Q: In mercury poisoning, what causes the brown reflex?

Anterior lens capsule. **Explanation:** The correct answer is **C. Anterior lens capsule.** Mercury poisoning, specifically chronic exposure to mercury vapor (mercurialism), leads to a distinct ocular sign known as **Mercuria-lentis**. This is characterized by a bilateral, symmetric, dull-grey to rose-brown discoloration of the **anterior lens capsule**. The discoloration is caused by the deposition of fine mercury particles on the capsule's surface. Importantly, this is a permanent finding that does not affect visual acuity and is often considered a diagnostic "biomarker" of chronic exposure. **Analysis of Options:** * **Anterior/Posterior Cornea (Options A & B):** While some metals like copper deposit in the cornea (Kayser-Fleischer ring in Descemet’s membrane), mercury specifically targets the lens capsule. Mercury does not typically cause a brown reflex in the corneal layers. * **Posterior Lens Capsule (Option D):** The deposition in mercuria-lentis is localized to the anterior surface. Posterior capsule changes are more commonly associated with systemic steroid use or radiation, not mercury. **High-Yield Clinical Pearls for NEET-PG:** * **Mercuria-lentis:** Look for the keyword "Rose-brown reflex" or "Lustreless" appearance of the anterior lens. * **Chrysiasis:** Gold deposition in the **stroma** of the cornea (associated with rheumatoid arthritis treatment). * **Argyrosis:** Silver deposition, typically causing a slate-grey discoloration of the **conjunctiva** and deep corneal layers. * **Chalcosis:** Copper deposition causing a **Sunflower cataract** (anterior capsule) and **Kayser-Fleischer ring** (Descemet’s membrane). * **Siderosis Bulbi:** Iron deposition leading to a "Rusty" appearance of the lens and iris.

Q: Which one of the following is the first symptom of sympathetic ophthalmia?

Photophobia. **Explanation:** **Sympathetic Ophthalmia (SO)** is a rare, bilateral granulomatous panuveitis that occurs following a penetrating ocular injury or intraocular surgery in one eye (the **exciting eye**), which subsequently leads to inflammation in the fellow, uninjured eye (the **sympathizing eye**). **Why Photophobia is the correct answer:** The earliest clinical manifestation of sympathetic ophthalmia is a **prodromal stage** characterized by a loss of accommodation and **photophobia**. This occurs due to early ciliary body irritation and mild anterior uveitis in the sympathizing eye. Patients often complain of difficulty with near work and sensitivity to light before significant visual loss or structural changes occur. **Analysis of Incorrect Options:** * **Pain:** While the eye may become irritable, acute severe pain is not the hallmark initial symptom; it is more characteristic of conditions like acute congestive glaucoma or endophthalmitis. * **Colored Haloes:** This is a classic symptom of corneal edema, most commonly seen in acute angle-closure glaucoma, not granulomatous uveitis. * **Color Blindness:** This typically indicates optic nerve pathology or retinal dystrophy. While the optic nerve can be involved in advanced SO (papillitis), it is never the presenting symptom. **High-Yield Clinical Pearls for NEET-PG:** * **Pathology:** Characterized by non-necrotizing granulomatous inflammation. A pathognomonic histological feature is **Dalen-Fuchs nodules** (clusters of epithelioid cells between the RPE and Bruch’s membrane). * **Sparing of Choriocapillaris:** Unlike many other uveitic conditions, the choriocapillaris is typically spared in SO. * **Prevention:** The most effective prevention is the **enucleation** of the injured (exciting) eye within **2 weeks** (10–14 days) of the injury if it has no visual potential. * **Treatment:** High-dose systemic corticosteroids and immunosuppressants.

Q: Amsler sign is seen in which of the following conditions?

Fuchs uveitis. **Explanation:** **Amsler Sign** (also known as the Amsler-Verrey sign) is a classic clinical finding in **Fuchs Heterochromic Iridocyclitis (FHI)**. It refers to the occurrence of a filiform hemorrhage in the anterior chamber (hyphema) following a paracentesis or minor trauma to the globe (such as during cataract surgery or even applanation tonometry). The underlying mechanism involves the presence of fragile, thin-walled neovascular vessels on the iris and in the angle of the anterior chamber. These abnormal vessels lack a proper basement membrane and bleed easily when the intraocular pressure (IOP) drops suddenly. **Analysis of Options:** * **Pars planitis:** Characterized by "snowbanking" and "snowballs" in the vitreous, but does not feature Amsler sign. * **Macular degeneration:** Associated with the **Amsler Grid** test (used to detect metamorphopsia), which is a common point of confusion for students. It does not involve the Amsler sign. * **Posner-Schlossman syndrome (Glaucomatocyclitic crisis):** Presents with recurrent episodes of very high IOP and mild anterior uveitis, but lacks the specific vascular fragility seen in FHI. **High-Yield Clinical Pearls for FHI:** 1. **Triad:** Heterochromia iridis (affected eye is usually lighter), diffuse stellate keratic precipitates (KPs), and early cataract formation. 2. **Chronic & Low Grade:** It is a non-granulomatous, chronic uveitis that typically does not respond to topical steroids. 3. **No Synechiae:** Despite chronic inflammation, posterior synechiae are characteristically absent. 4. **Complications:** Secondary glaucoma and posterior subcapsular cataract are common.

Q: Which of the following is a painless condition?

Posterior uveitis. **Explanation:** The key to answering this question lies in the anatomical distribution of sensory innervation in the eye. The **trigeminal nerve (Cranial Nerve V)**, specifically the ophthalmic division (V1), provides rich sensory innervation to the anterior segment of the eye, including the cornea, iris, and ciliary body. **Why Posterior Uveitis is the Correct Answer:** Posterior uveitis involves inflammation of the choroid (choroiditis), retina (retinitis), or vitreous. Unlike the anterior segment, the **choroid and retina lack sensory pain fibers**. Therefore, inflammation in these areas does not trigger pain. Patients typically present with painless blurring of vision, floaters, or scotomas. Pain only occurs in posterior uveitis if there is secondary involvement of the optic nerve or extension of inflammation to the anterior segment or sclera. **Why the Other Options are Incorrect:** * **Anterior Diffuse and Nodular Uveitis (Options A & B):** These are forms of inflammation involving the iris and ciliary body. Because these structures are highly vascular and densely innervated by the long and short ciliary nerves, inflammation leads to significant pain, photophobia, and ciliary spasm. * **Iridocyclitis (Option D):** This is the clinical term for anterior uveitis (inflammation of the iris and ciliary body). It is classically characterized by the "triad of symptoms": pain, redness (ciliary congestion), and photophobia. **NEET-PG High-Yield Pearls:** * **Painful Red Eye:** Think Anterior Uveitis, Acute Congestive Glaucoma, or Corneal Ulcer. * **Painless Loss of Vision:** Think Posterior Uveitis, Central Retinal Artery Occlusion (CRAO), Vitreous Hemorrhage, or Retinal Detachment. * **Mydriatics in Uveitis:** Atropine is used in anterior uveitis not just to prevent synechiae, but to provide **pain relief** by paralyzing the ciliary muscle (cycloplegia).

Q: All of the following are specific manifestations of albinism, except:

Red reflex. In albinism, the primary defect is a deficiency in melanin production. This lack of pigment in the uveal tract (iris and choroid) and the retinal pigment epithelium (RPE) leads to several characteristic ocular findings. **Explanation of the Correct Answer:** **A. Red reflex:** This is the correct answer because a red reflex is a **normal** clinical finding (the reflection of light off the vascularized choroid through the pupil). In albinism, the specific pathological finding is **Iris Transillumination**. Because the iris lacks pigment, light passes through the iris tissue itself rather than just the pupil, creating a "glow" or transillumination effect. While a red reflex is visible, it is not a specific *manifestation* or diagnostic sign of the disease in the way the other options are. **Explanation of Incorrect Options:** * **B. Decreased visual acuity:** This is a hallmark of albinism, primarily due to **foveal hypoplasia** (failure of the fovea to develop properly because melanin is required for normal retinal patterning). * **C. Photophobia:** The lack of pigment in the iris and RPE allows excessive, scattered light to enter the eye, causing significant light sensitivity. * **D. Nystagmus:** This is almost always present in ocular albinism, resulting from poor fixation due to foveal hypoplasia and abnormal decussation of optic nerve fibers at the chiasm. **High-Yield Clinical Pearls for NEET-PG:** * **Chiasmal Misrouting:** In albinism, there is an excessive decussation of temporal retinal fibers (more than 50% cross), which can be diagnosed via VEP (Visual Evoked Potential). * **Tyrosinase:** The most common enzyme deficiency in Oculocutaneous Albinism (OCA). * **Hermansky-Pudlak Syndrome:** Albinism associated with platelet dysfunction (bleeding diathesis). * **Chediak-Higashi Syndrome:** Albinism associated with immune deficiency and giant lysosomal granules.

Question 1

A cherry-red spot on funduscopic examination is seen in all of the following conditions, except?

Accepted Answer

Krabbe's disease

Answer

GM1 gangliosidosis

Answer

Niemann-Pick disease

Answer

Multiple sulfatase deficiency

Question 2

What is a common feature between sympathetic ophthalmitis and Vogt-Koyanagi-Harada syndrome?

Accepted Answer

Vitiligo

Answer

Autoimmune etiology

Answer

Injury

Answer

Uveitis

Question 3

In mercury poisoning, what causes the brown reflex?

Accepted Answer

Anterior lens capsule

Answer

Anterior cornea

Answer

Posterior cornea

Answer

Posterior lens capsule

Question 4

Ocular manifestations of Wegener's granulomatosis include all of the following except?

Accepted Answer

Internal ophthalmoplegia

Answer

Proptosis

Answer

Nasolacrimal duct obstruction

Answer

Necrotizing scleritis

Question 5

Which of the following statements regarding ocular manifestations of HIV is FALSE?

Accepted Answer

Cotton wool spots are indicative of Cytomegalovirus (CMV) infection in HIV patients.

Answer

Approximately 50% of HIV patients exhibit cotton wool spots.

Answer

Kaposi's sarcoma may manifest on the eyelids in HIV patients.

Answer

Vascular narrowing is observed in about 75% of HIV patients.

Question 6

Puscher's retinopathy in acute pancreatitis is due to which of the following?

Accepted Answer

Occlusion of the posterior retinal artery with aggregated granulocytes

Answer

Occlusion of ciliary artery with exudation

Answer

Central retinal artery occlusion with cotton wool spots and hemorrhage

Answer

Inflammatory exudates in the retinal vein

Question 7

Which one of the following is the first symptom of sympathetic ophthalmia?

Accepted Answer

Photophobia

Answer

Pain

Answer

Colored haloes

Answer

Color blindness

Question 8

Amsler sign is seen in which of the following conditions?

Accepted Answer

Fuchs uveitis

Answer

Pars planitis

Answer

Macular degeneration

Answer

Posner-Schlossman syndrome

Question 9

Which of the following is a painless condition?

Accepted Answer

Posterior uveitis

Answer

Anterior diffuse uveitis

Answer

Anterior nodular uveitis

Answer

Iridocyclitis

Question 10

All of the following are specific manifestations of albinism, except:

Accepted Answer

Red reflex

Answer

Decreased visual acuity

Answer

Photophobia

Answer

Nystagmus

Ocular Manifestations of Systemic Disorders — MCQs

Ocular Manifestations of Systemic Disorders — MCQs

On this page

Practice by Chapter

Want unlimited practice?