Ocular Manifestations of Systemic Disorders Practice Questions

Q: What is the most common ocular infection in patients with AIDS?

Cytomegalovirus (CMV). **Explanation:** **Cytomegalovirus (CMV)** is the correct answer because it is the most common opportunistic ocular infection and the leading cause of blindness in patients with late-stage AIDS. It typically occurs when the **CD4+ T-lymphocyte count falls below 50 cells/µL**. The hallmark clinical presentation is **CMV Retinitis**, characterized by a "pizza-pie" or "cheese and ketchup" appearance (confluent areas of yellow-white retinal necrosis with associated intraretinal hemorrhage). **Analysis of Incorrect Options:** * **A. Chlamydia:** While *Chlamydia trachomatis* is a common cause of inclusion conjunctivitis and trachoma worldwide, its prevalence is not specifically linked to the immunocompromised state of AIDS. * **B. Herpes Simplex Virus (HSV):** HSV can cause keratitis or Acute Retinal Necrosis (ARN) in HIV patients. However, it is significantly less common than CMV retinitis in the context of advanced AIDS. * **D. Rubella Virus:** Rubella is associated with congenital cataracts and "salt and pepper" retinopathy, but it is not a common opportunistic infection in adult AIDS patients. **High-Yield Clinical Pearls for NEET-PG:** * **Most common ocular finding in AIDS:** HIV Microangiopathy (Cotton wool spots). Note the distinction: CMV is the most common *infection*, but cotton wool spots are the most common *finding*. * **Treatment of choice for CMV Retinitis:** Intravenous or intravitreal **Ganciclovir**. Foscarnet and Cidofovir are alternatives. * **Immune Recovery Uveitis (IRU):** An inflammatory response that occurs in AIDS patients with CMV retinitis after starting HAART (Highly Active Antiretroviral Therapy) due to a recovering immune system. * **Second most common ocular infection:** Toxoplasmosis (presents as "headlight in the fog" appearance).

Q: A 32-year-old male presents with unilateral diminished vision in the right eye. On examination, there is mild iritis, vitritis, and a focal necrotic lesion is seen at the macula. What is the most likely diagnosis?

Ocular toxoplasmosis. **Explanation:** The clinical presentation of unilateral diminished vision, mild anterior chamber reaction (iritis), vitritis, and a focal necrotic retinal lesion is classic for **Ocular Toxoplasmosis**. **Why Ocular Toxoplasmosis is correct:** * **Pathophysiology:** Caused by the parasite *Toxoplasma gondii*, it is the most common cause of posterior uveitis worldwide. * **The "Headlight in the Fog" Appearance:** The focal necrotizing retinochoroiditis causes an intense overlying vitritis. This creates the characteristic clinical sign where the white lesion is seen through a hazy vitreous. * **Location:** While it can occur anywhere, it has a predilection for the macula, leading to significant vision loss. **Why other options are incorrect:** * **Multiple Evanescent White Dot Syndrome (MEWDS):** Typically presents with multiple, very small, fine white dots at the level of the RPE/deep retina. It does not cause focal necrotic lesions or significant vitritis. * **Multifocal Choroiditis (MFC):** Presents with multiple, small, punched-out chorioretinal scars and lesions. While it causes vitritis, it is usually bilateral and lacks the large, solitary focal necrotic appearance of Toxoplasmosis. * **Ocular Sarcoidosis:** Characterized by granulomatous uveitis (Mutton-fat KPs), "string of pearls" vitreous opacities, and retinal periphlebitis (candle-wax drippings), rather than a focal necrotic macular lesion. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Sign:** "Headlight in the fog" (focal retinitis + vitritis). * **Recurrence:** New lesions often arise at the margins of old, pigmented chorioretinal scars (satellite lesions). * **Treatment:** The "Triple Therapy" includes Pyrimethamine, Sulfadiazine, and Folinic acid (to prevent bone marrow toxicity), often combined with systemic steroids. * **Congenital Triad:** Chorioretinitis, Hydrocephalus, and Intracranial calcifications.

Q: Which of the following is not a feature of anterior uveitis?

Normal pupil. In anterior uveitis (iridocyclitis), the pupil is typically **constricted (miotic)** and often sluggish or non-reactive. This occurs due to reflex spasm of the sphincter pupillae muscle and the presence of inflammatory mediators. In chronic or severe cases, the pupil may become irregular due to **posterior synechiae** (adhesions between the iris and the lens). Therefore, a "normal pupil" is not a feature of the condition. **Explanation of Options:** * **Cells in the anterior chamber (Option A):** This is the hallmark of active inflammation. It represents the leakage of leukocytes from iris and ciliary body vessels into the aqueous humor. * **Keratic precipitates (Option C):** These are inflammatory cell clusters (leukocytes) that deposit on the corneal endothelium. They are a classic sign of anterior uveitis, categorized as "mutton-fat" (granulomatous) or "fine" (non-granulomatous). * **Corneal edema (Option D):** Inflammation can lead to endothelial dysfunction or a secondary rise in intraocular pressure (inflammatory glaucoma), causing the cornea to appear hazy or edematous. **High-Yield Clinical Pearls for NEET-PG:** * **Triad of Anterior Uveitis:** Ciliary congestion, miosis, and aqueous cells/flare. * **Aqueous Flare:** Caused by protein leakage (Tyndall effect); indicates a breakdown of the blood-aqueous barrier. * **Festooned Pupil:** An irregular pupil shape caused by localized posterior synechiae, often best visualized after instilling a mydriatic. * **Hypopyon:** A sterile collection of pus (WBCs) in the inferior angle of the anterior chamber, commonly seen in HLA-B27 associated uveitis or Behçet’s disease.

Q: Uveoparotitis is seen in which of the following systemic conditions?

Sarcoidosis. **Explanation:** **Uveoparotitis**, also known as **Heerfordt’s Syndrome**, is a specific clinical manifestation of **Sarcoidosis**. It is characterized by a classic tetrad: 1. **Uveitis:** Typically bilateral, granulomatous anterior uveitis. 2. **Parotitis:** Chronic, painless enlargement of the parotid glands. 3. **Facial Nerve Palsy:** The most common neurological involvement (cranial nerve VII). 4. **Low-grade Fever.** Sarcoidosis is a multisystem disorder characterized by non-caseating granulomas. In the eye, it most commonly presents as "mutton-fat" keratic precipitates and "busacca/koeppe" nodules. **Analysis of Incorrect Options:** * **B. Systemic Lupus Erythematosus (SLE):** Primarily causes keratoconjunctivitis sicca (dry eye) or retinal vasculitis (cotton wool spots). It does not typically involve the parotid glands. * **C. Scleroderma:** Associated with eyelid tightening and dry eyes, but not the uveoparotid triad. * **D. Mumps:** While mumps causes acute, painful parotitis and can occasionally cause dacryoadenitis or optic neuritis, it does not cause the chronic granulomatous uveoparotitis seen in Heerfordt’s Syndrome. **High-Yield Clinical Pearls for NEET-PG:** * **Lofgren’s Syndrome:** Another variant of Sarcoidosis (Erythema nodosum + Bilateral hilar lymphadenopathy + Arthralgia). * **Candle-wax drippings:** Characteristic perivenous exudates (periphlebitis) seen in Sarcoid retinopathy. * **Investigation of Choice:** Chest X-ray/CT (Hilar lymphadenopathy) and elevated Serum ACE levels. * **Biopsy:** Gold standard (shows non-caseating granulomas).

Q: Diabetes mellitus is associated with which of the following ocular conditions?

All of the above. **Explanation:** Diabetes Mellitus (DM) is a multisystem metabolic disorder that affects the eye through various mechanisms, primarily involving microvascular damage and metabolic changes. * **Hard Exudates:** These are yellowish, waxy deposits of lipoproteins and lipid-laden macrophages in the outer plexiform layer of the retina. They occur due to chronic leakage from damaged capillaries (increased vascular permeability), a hallmark of Non-Proliferative Diabetic Retinopathy (NPDR). * **Neovascularization:** Chronic retinal ischemia triggers the release of Vascular Endothelial Growth Factor (VEGF). This leads to the formation of new, fragile vessels (Neovascularization) on the retina (NVD/NVE) or iris (NVI). This defines Proliferative Diabetic Retinopathy (PDR). * **Glaucoma:** Diabetes increases the risk of both Open-Angle Glaucoma and **Neovascular Glaucoma (NVG)**. NVG occurs when new vessels grow in the iridocorneal angle, obstructing aqueous outflow and causing a painful, blind eye. Since all three conditions are well-documented ocular complications of DM, **Option D** is the correct answer. **High-Yield Clinical Pearls for NEET-PG:** 1. **Earliest Clinical Sign of DR:** Microaneurysms (found in the inner nuclear layer). 2. **Earliest Pathological Change:** Loss of pericytes and basement membrane thickening. 3. **Dot-and-Blot Hemorrhages:** Located in the inner nuclear layer. 4. **Snowflake Cataract:** A classic, rare finding in young patients with uncontrolled Type 1 DM. 5. **Refractive Changes:** Hyperglycemia typically causes a **myopic shift** due to sorbitol accumulation in the lens, leading to hydration and increased curvature.

Q: All of the following are seen in Vogt-Koyanagi-Harada (VKH) syndrome except?

Iris heterochromia. **Explanation:** **Vogt-Koyanagi-Harada (VKH) syndrome** is a multisystem autoimmune disorder characterized by T-cell mediated destruction of melanocytes. It typically affects pigmented tissues in the eye, ear, skin, and meninges. **Why Iris Heterochromia is the Correct Answer:** Iris heterochromia (difference in color between the two eyes) is **not** a feature of VKH. It is most classically associated with **Fuchs’ Heterochromic Iridocyclitis (FHI)** or Waardenburg syndrome. In VKH, while the iris may show signs of inflammation (nodules or synechiae), the primary pathology is a bilateral, diffuse granulomatous panuveitis rather than a change in iris pigment distribution leading to heterochromia. **Analysis of Other Options:** * **Granulomatous Uveitis (C):** This is the hallmark ocular finding. It presents as bilateral diffuse uveitis with "Mutton-fat" KPs and characteristic exudative (serous) retinal detachments. * **Meningismus (B):** This occurs during the **Prodromal stage**. Patients present with headache, neck stiffness, and CSF pleocytosis due to inflammation of the meninges. * **Vitiligo (A):** This occurs during the **Convalescent/Chronic stage**, along with poliosis (whitening of hair/eyelashes) and alopecia, due to the systemic destruction of skin melanocytes. **High-Yield Clinical Pearls for NEET-PG:** * **Four Stages of VKH:** Prodromal (Neurological) → Uveitic (Ocular) → Convalescent (Integumentary) → Chronic recurrent. * **Sugiura’s Sign:** Perilimbal vitiligo (depigmentation), a pathognomonic sign in the convalescent stage. * **Sunset Glow Fundus:** An orange-red discoloration of the fundus due to diffuse depigmentation of the RPE. * **Treatment:** High-dose systemic corticosteroids are the mainstay of therapy.

Q: What is the commonest eye tumor?

Retinoblastoma. **Explanation:** The correct answer is **Retinoblastoma (Option B)**. This is a high-yield fact for NEET-PG, as Retinoblastoma is the **most common primary intraocular malignancy in children** and the **most common primary intraocular tumor overall**. It arises from the neurosensory retina due to a mutation in the RB1 tumor suppressor gene on chromosome 13q14. While it is a pediatric tumor, its high incidence relative to other primary ocular malignancies makes it the correct answer in this context. **Analysis of Options:** * **A. Melanoma:** Uveal melanoma is the most common primary intraocular malignancy in **adults**, but it is less frequent globally than Retinoblastoma. Note: Metastatic tumors (secondary) are technically more common than primary tumors, but among the primary options listed, Retinoblastoma prevails. * **C. Carcinoma of eyelid:** While Basal Cell Carcinoma (BCC) is the most common malignant tumor of the **eyelid**, it is an adnexal tumor, not an "eye tumor" (intraocular) in the strict sense. * **D. Carcinoma of lacrimal sac:** These are extremely rare malignancies and are never the "most common" in any category. **High-Yield Clinical Pearls for NEET-PG:** * **Most common presenting sign:** Leukocoria (White pupillary reflex). * **Most common secondary tumor:** Metastasis (usually from breast in women, lung in men). * **Pathognomonic Histology:** Flexner-Wintersteiner rosettes. * **Calcification:** Present in 90% of cases (visible on CT/Ultrasound), a key diagnostic feature. * **Inheritance:** 40% are hereditary (bilateral/multifocal), 60% are sporadic (unilateral).

Q: Snow banking is a clinical sign seen in which condition?

Intermediate uveitis. **Explanation:** **Intermediate uveitis** is the correct answer because "snow banking" is its hallmark clinical sign. Intermediate uveitis primarily involves the inflammation of the **pars plana** (the posterior part of the ciliary body) and the peripheral retina. * **Why it occurs:** Chronic inflammation leads to the accumulation of inflammatory exudates and fibrovascular membranes over the pars plana and the ora serrata. These white, plaque-like deposits typically settle in the inferior quadrant, resembling a "snow bank." * **Snowballs:** Another characteristic feature is "snowballs," which are whitish inflammatory aggregates (clumps of cells) floating in the vitreous. **Analysis of Incorrect Options:** * **Anterior Uveitis:** Characterized by cells and flare in the anterior chamber, Keratic Precipitates (KPs) on the corneal endothelium, and synechiae. It does not involve the pars plana. * **Posterior Uveitis:** Primarily involves the choroid and retina (chorioretinitis). While it can cause vitreous haze, the specific anatomical localization of exudates at the pars plana (snow banking) is absent. **High-Yield Clinical Pearls for NEET-PG:** * **Pars Planitis:** This term is used when intermediate uveitis is idiopathic (accounts for ~70% of cases). * **Systemic Associations:** Always rule out **Multiple Sclerosis (MS)** and **Sarcoidosis** in patients with intermediate uveitis. * **Most Common Complication:** Cystoid Macular Edema (CME) is the leading cause of vision loss in these patients. * **Triad of Intermediate Uveitis:** Vitritis, Snowballs, and Snow banking.

Question 1

What is the most common ocular infection in patients with AIDS?

Accepted Answer

Cytomegalovirus (CMV)

Answer

Chlamydia

Answer

Herpes simplex virus

Answer

Rubella virus

Question 2

A 32-year-old male presents with unilateral diminished vision in the right eye. On examination, there is mild iritis, vitritis, and a focal necrotic lesion is seen at the macula. What is the most likely diagnosis?

Accepted Answer

Ocular toxoplasmosis

Answer

Multiple Evanescent White Dot syndrome

Answer

Multifocal choroiditis

Answer

Ocular sarcoidosis

Question 3

Which of the following is not a feature of anterior uveitis?

Accepted Answer

Normal pupil

Answer

Cells in anterior chamber

Answer

Keratic precipitates

Answer

Corneal edema

Question 4

Xerophthalmia is caused by which of the following?

Accepted Answer

Cystic fibrosis

Answer

Vitamin C deficiency

Answer

Small bowel resection

Answer

Chronic alcoholism

Question 5

Uveoparotitis is seen in which of the following systemic conditions?

Accepted Answer

Sarcoidosis

Answer

Systemic Lupus Erythematosus

Answer

Scleroderma

Answer

Mumps

Question 6

Aqueous flare seen in the anterior chamber is due to:

Accepted Answer

Leakage of protein particles into the aqueous humor following breakdown of the blood-aqueous barrier.

Answer

Leakage of leukocytes into the anterior chamber.

Answer

Both of the above.

Answer

None of the above.

Question 7

Diabetes mellitus is associated with which of the following ocular conditions?

Accepted Answer

All of the above

Answer

Hard exudates

Answer

Neovascularization

Answer

Glaucoma

Question 8

All of the following are seen in Vogt-Koyanagi-Harada (VKH) syndrome except?

Accepted Answer

Iris heterochromia

Answer

Vitiligo

Answer

Meningismus

Answer

Granulomatous uveitis

Question 9

What is the commonest eye tumor?

Accepted Answer

Retinoblastoma

Answer

Melanoma

Answer

Carcinoma of eyelid

Answer

Carcinoma of lacrimal sac

Question 10

Snow banking is a clinical sign seen in which condition?

Accepted Answer

Intermediate uveitis

Answer

Anterior uveitis

Answer

Posterior uveitis

Answer

None of these

Ocular Manifestations of Systemic Disorders — MCQs

Ocular Manifestations of Systemic Disorders — MCQs

On this page

Practice by Chapter

Want unlimited practice?