Posterior Capsular Opacification — MCQs
Uncontrolled hypertension may cause which of the following complications in cataract surgery:
Intumescent cataract is associated with which type of glaucoma?
Which of the following ophthalmologic conditions shows 'Vossius ring' during examination?
YAG laser is used in -
In which condition are Elschnig pearls typically observed?
Statement 1 - A 59-year-old patient presents with flaccid bullae. Histopathology shows a suprabasal acantholytic split. Statement 2 - The row of tombstones appearance is diagnostic of Pemphigus vulgaris.
Windshield wiper syndrome refers to the unpredictable movement of an intraocular lens (IOL) during head motion. Which of the following describes this condition?
YAG laser is used in the treatment of:
Floppy iris syndrome is associated with usage of
A 56 year old patient presents after 3 days of cataract surgery with a history of increasing pain and diminution of vision after an initial improvement. The most likely cause would be:
Posterior Capsular Opacification Indian Medical PG Practice Questions and MCQs
Question 1: Uncontrolled hypertension may cause which of the following complications in cataract surgery:
- A. Retinal detachment
- B. Glaucoma
- C. Suprachoroidal hemorrhage (Correct Answer)
- D. Endophthalmitis
Explanation: ***Suprachoroidal hemorrhage*** - **Uncontrolled hypertension** significantly increases the risk of **suprachoroidal hemorrhage** during cataract surgery due to fragile blood vessels and elevated intraoperative blood pressure. - This complication can lead to acute, severe pain, vision loss, and globe rupture, often requiring immediate surgical intervention. *Retinal detachment* - While a serious complication of ocular surgery, **retinal detachment** is not directly caused by uncontrolled hypertension during cataract surgery. - It is more commonly associated with posterior capsular rupture, vitreous loss, or high myopia. *Glaucoma* - **Glaucoma** is a chronic condition characterized by optic nerve damage, often due to elevated intraocular pressure, and is not an acute complication of uncontrolled hypertension during cataract surgery. - While hypertension is a risk factor for certain types of glaucoma, it does not directly cause an acute glaucomatous event during the procedure. *Endophthalmitis* - **Endophthalmitis** is a severe infection of the intraocular fluids and tissues, typically occurring post-operatively. - It is primarily caused by bacterial or fungal contamination during or after surgery and is not directly linked to uncontrolled hypertension.
Question 2: Intumescent cataract is associated with which type of glaucoma?
- A. Phacolytic glaucoma
- B. Phacotopic glaucoma
- C. Pseudophakic glaucoma
- D. Phacomorphic glaucoma (Correct Answer)
Explanation: ***Phacomorphic glaucoma*** - **Intumescent cataract** refers to a mature or hypermature cataract that has absorbed water, leading to a swollen lens. - This swelling can cause the lens to push the iris forward, leading to secondary **angle closure glaucoma** due to pupillary block, which is characteristic of phacomorphic glaucoma. *Phacolytic glaucoma* - This type of glaucoma is caused by leakage of **high-molecular-weight lens proteins** from a mature or hypermature cataract into the aqueous humor, triggering a macrophagic response and obstruction of the trabecular meshwork. - It results in an **open-angle glaucoma** and anterior chamber inflammation, unlike the angle closure seen with intumescent cataracts. *Phacotopic glaucoma* - This is a rare term and not a recognized distinct category of glaucoma related to lens swelling. It may refer loosely to glaucoma associated with **lens dislocation** or subluxation. - It does not specifically describe glaucoma caused by an **intumescent cataract**. *Pseudophakic glaucoma* - This refers to glaucoma that develops in patients who have undergone **cataract surgery** and have an **intraocular lens (IOL)** implant (pseudophakia). - It can be caused by various mechanisms post-surgery, such as inflammation, steroid response, or IOL-related issues, but it is not directly associated with the presence of an intumescent natural lens.
Question 3: Which of the following ophthalmologic conditions shows 'Vossius ring' during examination?
- A. Angle closure glaucoma
- B. Traumatic iritis (Correct Answer)
- C. Retinal detachment
- D. Corneal ulcer
Explanation: ***Traumatic iritis*** - A **Vossius ring** is a circular pigment deposit on the anterior lens capsule, formed by the impact of the iris during **ocular trauma**. - Its presence is a clear indicator of **blunt globe trauma**, which often leads to traumatic iritis. *Angle closure glaucoma* - This condition involves an **acute increase in intraocular pressure** due to the iris blocking the drainage angle. - While it can cause severe pain and vision loss, it does not involve the formation of a **Vossius ring**. *Retinal detachment* - This condition involves the separation of the sensory retina from the underlying retinal pigment epithelium. - Symptoms include **flashing lights**, **floaters**, and a **"curtain" vision loss**, with no association with a Vossius ring. *Corneal ulcer* - A corneal ulcer is an **open sore on the cornea**, typically caused by infection or injury. - It presents with **pain**, **photophobia**, **redness**, and **discharge**, without the characteristic lens pigment deposit.
Question 4: YAG laser is used in -
- A. Diabetes
- B. Refractive errors
- C. Retinal detachment
- D. After-cataract (Correct Answer)
Explanation: ***After-cataract*** - **Nd:YAG laser capsulotomy** is the treatment of choice for **posterior capsule opacification (PCO)**, also known as after-cataract, a common complication following cataract surgery. - The laser creates an opening in the opacified posterior capsule, restoring clear vision. *Diabetes* - While diabetes can lead to eye complications like **diabetic retinopathy**, **YAG laser** is not the primary or exclusive treatment modality for diabetes itself. - **Panretinal photocoagulation (PRP)** using argon laser is used for proliferative diabetic retinopathy, but not Nd:YAG. *Refractive errors* - **Refractive errors** like myopia, hyperopia, and astigmatism are typically corrected with **glasses, contact lenses, or excimer laser surgery (LASIK, PRK)**. - **YAG laser** is not used for direct correction of refractive errors. *Retinal detachment* - **Retinal detachment** requires surgical intervention such as **scleral buckling**, **vitrectomy**, or **pneumatic retinopexy**. - **YAG laser** is not used to treat an established retinal detachment, though argon laser may be used for prophylactic barrier laser around retinal tears.
Question 5: In which condition are Elschnig pearls typically observed?
- A. Wilson's disease
- B. Congenital cataract
- C. Complicated cataract
- D. Secondary cataract (Correct Answer)
Explanation: ***Secondary cataract*** - **Elschnig pearls** are secondary cataracts characterized by the proliferation and migration of residual epithelial cells on the posterior capsule after **extracapsular cataract extraction**. - These are a common cause of **posterior capsule opacification (PCO)**, which leads to blurred vision following cataract surgery. *Wilson's disease* - This condition is associated with **Kayser-Fleischer rings** in the cornea, which are deposits of copper, not Elschnig pearls. - It is a **genetic disorder** of copper metabolism affecting various organs, including the liver, brain, and eyes. *Complicated cataract* - While complicated cataracts refer to cataracts occurring secondary to other ocular or systemic diseases, the term itself does not specifically describe Elschnig pearls. - Examples include cataracts due to **uveitis** or **diabetes**, which have distinct morphological characteristics. *Congenital cataract* - These cataracts are present at birth or develop shortly thereafter and are due to **genetic factors** or **in utero infections**. - They have various appearances depending on the cause but do not present as Elschnig pearls, which are a postoperative phenomenon.
Question 6: Statement 1 - A 59-year-old patient presents with flaccid bullae. Histopathology shows a suprabasal acantholytic split. Statement 2 - The row of tombstones appearance is diagnostic of Pemphigus vulgaris.
- A. Statements 1 & 2 are correct, 2 is not explaining 1 (Correct Answer)
- B. Statements 1 and 2 are correct and 2 is the correct explanation for 1
- C. Statements 1 and 2 are incorrect
- D. Statement 1 is incorrect
Explanation: ***Correct: Statements 1 & 2 are correct, 2 is not explaining 1*** **Analysis of Statement 1:** - A 59-year-old patient with **flaccid bullae** and **suprabasal acantholytic split** on histopathology is the classic presentation of **Pemphigus vulgaris** - The flaccid (easily ruptured) nature of bullae distinguishes it from tense bullae seen in bullous pemphigoid - The suprabasal location of the split (just above the basal layer) with acantholysis (loss of cell-to-cell adhesion) is pathognomonic - **Statement 1 is CORRECT** ✓ **Analysis of Statement 2:** - The **"row of tombstones" or "tombstone appearance"** is indeed a diagnostic histopathological feature of Pemphigus vulgaris - This appearance results from basal keratinocytes remaining attached to the basement membrane while suprabasal cells separate due to acantholysis - The intact basal cells standing upright resemble a row of tombstones - **Statement 2 is CORRECT** ✓ **Does Statement 2 explain Statement 1?** - Statement 2 describes a **histopathological appearance** (tombstone pattern) that is a **consequence** of the suprabasal split - However, it does NOT explain the **underlying cause** of the flaccid bullae or the suprabasal split - The true explanation involves **IgG autoantibodies against desmoglein 3 (and desmoglein 1)**, which attack intercellular adhesion structures (desmosomes), causing **acantholysis** - Therefore, **Statement 2 does NOT explain Statement 1** ✗ *Incorrect: Statement 2 is the correct explanation for Statement 1* - While both statements describe features of Pemphigus vulgaris, the tombstone appearance is a descriptive finding, not an explanatory mechanism *Incorrect: Statements 1 and 2 are incorrect* - Both statements are medically accurate descriptions of Pemphigus vulgaris features *Incorrect: Statement 1 is incorrect* - Statement 1 correctly describes the cardinal clinical and histopathological features of Pemphigus vulgaris
Question 7: Windshield wiper syndrome refers to the unpredictable movement of an intraocular lens (IOL) during head motion. Which of the following describes this condition?
- A. Dislocation of Intraocular lens
- B. Posterior capsular opacification
- C. Reaction to lens material
- D. Malposition of lens (Correct Answer)
Explanation: ***Malposition of lens*** - **Windshield wiper syndrome** is a classic presentation of an **intraocular lens (IOL)** that is **malpositioned** within the capsular bag or ciliary sulcus. - The unpredictable oscillating movement of the IOL, mimicking a **windshield wiper**, arises from inadequate support or fixation, particularly when the capsular bag has insufficient integrity. - This is a specific type of malposition characterized by the **dynamic movement** with head motion rather than static displacement. *Dislocation of Intraocular lens* - While IOL dislocation also involves an IOL moving out of its intended position, **dislocation** typically implies a more severe and complete displacement from the capsular bag. - **Windshield wiper syndrome** specifically highlights the *oscillating movement* of the IOL within its supporting structure, which is characteristic of **malposition** rather than complete dislocation. - In true dislocation, the IOL typically falls into the vitreous cavity or anterior chamber. *Posterior capsular opacification* - **Posterior capsular opacification (PCO)** refers to the clouding of the posterior capsule behind the IOL due to lens epithelial cell proliferation. - PCO causes gradual vision loss and glare, but it does not involve the physical movement of the IOL itself. - PCO is a common late complication of cataract surgery but is unrelated to IOL instability. *Reaction to lens material* - A reaction to lens material would typically manifest as **inflammatory response**, such as **uveitis**, **toxic anterior segment syndrome (TASS)**, or secondary **glaucoma**. - Such reactions do not cause the mechanical oscillating movement described as windshield wiper syndrome. - Modern **biocompatible IOLs** (acrylic, silicone) have significantly reduced the incidence of material-related reactions.
Question 8: YAG laser is used in the treatment of:
- A. Open-angle glaucoma
- B. Retinal detachment
- C. Diabetic retinopathy
- D. After cataract (Correct Answer)
Explanation: ***After cataract*** - YAG laser is primarily used for **posterior capsulotomy** to treat **"after cataract"** or **posterior capsule opacification (PCO)**, a common complication following cataract surgery. - This procedure creates an opening in the opacified posterior capsule to restore clear vision without requiring a surgical incision. *Open-angle glaucoma* - YAG lasers are sometimes used in **peripheral iridotomy** for narrow-angle or **angle-closure glaucoma**, but not typically for the primary treatment of open-angle glaucoma, which is managed with medications or other laser procedures (e.g., SLT). - While YAG laser can be used for **iridotomy** in specific glaucoma types, it is generally not the go-to treatment for improving outflow in **open-angle glaucoma**. *Retinal detachment* - Retinal detachment is a surgical emergency typically treated with procedures like **vitrectomy**, **scleral buckle**, or **pneumatic retinopexy**. - Lasers used for retinal issues are often **argon lasers** for creating chorioretinal adhesions to prevent or wall off detachments, not YAG lasers for the detachment itself. *Diabetic retinopathy* - **Diabetic retinopathy** is primarily treated with **argon laser photocoagulation** (panretinal photocoagulation or focal laser) to destroy abnormal blood vessels and reduce macular edema. - YAG lasers are not used for the direct treatment of **diabetic retinopathy** or its associated neovascularization.
Question 9: Floppy iris syndrome is associated with usage of
- A. 5 alpha reductase inhibitor
- B. PDE-5 inhibitor
- C. Anticholinergics
- D. Selective alpha-adrenergic antagonist (Correct Answer)
Explanation: ***Selective alpha-adrenergic antagonist*** - **Intraoperative Floppy Iris Syndrome (IFIS)** is classically associated with the use of **alpha-1 adrenergic antagonists**, particularly **tamsulosin**. - These drugs cause **flaccidity of the iris** and **prolapse through the incision** during **cataract surgery** by blocking **alpha-1 receptors** in the iris dilator muscle. *5 alpha reductase inhibitor* - These drugs, such as **finasteride** and **dutasteride**, inhibit the conversion of **testosterone to dihydrotestosterone (DHT)**. - They are used to treat **benign prostatic hyperplasia (BPH)** and **androgenetic alopecia** and have no known association with IFIS. *PDE-5 inhibitor* - **Phosphodiesterase-5 (PDE5) inhibitors** like **sildenafil** and **tadalafil** are used to treat **erectile dysfunction**. - While they can cause visual disturbances due to effects on retinal PDE6, they are **not associated with IFIS**. *Anticholinergics* - **Anticholinergic drugs** block the action of **acetylcholine** and are used for various conditions, including **overactive bladder** and **irritable bowel syndrome**. - They tend to cause **mydriasis (pupil dilation)**, but they do **not cause iris floppiness** or IFIS.
Question 10: A 56 year old patient presents after 3 days of cataract surgery with a history of increasing pain and diminution of vision after an initial improvement. The most likely cause would be:
- A. Endophthalmitis (Correct Answer)
- B. Central retinal vein occlusion
- C. Posterior capsular opacification (PCO)
- D. Retinal detachment
Explanation: ***Endophthalmitis*** - **Endophthalmitis** is a severe inflammation of the intraocular fluids (vitreous and aqueous humor), most commonly caused by infection following cataract surgery. - The presentation of **increasing pain** and **diminution of vision** a few days after initial improvement is a classic sign of acute post-operative endophthalmitis. *Central retinal vein occlusion* - **Central retinal vein occlusion (CRVO)** typically causes sudden, painless vision loss. - It is not commonly associated with **increasing pain** or a temporal relationship to recent cataract surgery in this manner. *Posterior capsular opacification (PCO)* - **Posterior capsular opacification (PCO)** develops weeks or months after cataract surgery, not within a few days. - It presents as gradual, painless blurring of vision without significant pain. *Retinal detachment* - **Retinal detachment** typically presents with sudden vision loss, flashes of light (photopsia), and floaters. - While it can occur after cataract surgery, it is less likely to present with **increasing pain** as the primary symptom described.
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