Ophthalmic Surgery Practice Questions

Q: What is the treatment for nasolacrimal duct obstruction?

All of the above. **Explanation:** The treatment for Nasolacrimal Duct Obstruction (NLDO) is a **step-wise approach** that depends on the patient's age and the severity/duration of the obstruction. 1. **Syringing (Diagnostic & Therapeutic):** In adults, syringing is primarily diagnostic to confirm the site of blockage. In partial or functional obstructions, the pressure of the fluid can sometimes clear minor debris or mucus plugs, acting therapeutically. 2. **Probing:** This is the treatment of choice for **Congenital NLDO** if conservative management (Crigler’s massage) fails. It is typically performed between 12–18 months of age. A Bowman’s probe is used to mechanically rupture the persistent membrane (usually the Valve of Hasner). 3. **Dacryocystorhinostomy (DCR):** This is the definitive surgical treatment for **acquired permanent NLDO** or failed probing in children. It involves creating a bypass anastomosis between the lacrimal sac and the nasal mucosa of the middle meatus, bypassing the obstructed duct. **Why "All of the above" is correct:** Since the question does not specify the age group (pediatric vs. adult) or the type of obstruction (congenital vs. acquired), all three modalities are recognized components of the management spectrum for NLDO. **High-Yield Clinical Pearls for NEET-PG:** * **Congenital NLDO:** Most common cause is a persistent membrane at the **Valve of Hasner**. * **Initial Management:** Digital pressure (Crigler’s massage) has a 90% success rate in the first year of life. * **DCR Indications:** Chronic dacryocystitis due to NLDO. The most common complication of DCR is hemorrhage. * **Dacryocystectomy (DCT):** Indicated if DCR is contraindicated (e.g., lacrimal sac tumor, elderly patients with atrophic rhinitis, or tuberculosis of the sac).

Q: Recovery in cataract surgery is fastest with which of the following procedures?

Phacoemulsification. **Explanation:** The speed of visual and physical recovery in cataract surgery is primarily determined by the **size of the incision** and the method of **wound closure**. **Phacoemulsification** is the correct answer because it utilizes a "micro-incision" (typically 2.2 to 2.8 mm). This small incision is often self-sealing (sutureless), leading to minimal **surgically induced astigmatism (SIA)**. Because the corneal curvature remains stable and the wound heals rapidly, patients achieve "walk-in, walk-out" recovery with functional vision often returning within 24–48 hours. **Analysis of Incorrect Options:** * **ICCE (Option A):** Involves a large 120–150 degree superior limbal incision (approx. 10–12 mm) to remove the entire lens with the capsule. It requires multiple sutures, leading to high SIA and a prolonged recovery period (weeks to months). * **ECCE (Option B & D):** Conventional ECCE requires a 9–11 mm incision to express the nucleus. Even with IOL implantation, the large wound and necessary sutures result in significant astigmatism and a slower stabilization of vision compared to phacoemulsification. **NEET-PG High-Yield Pearls:** * **Gold Standard:** Phacoemulsification is currently the gold standard for cataract surgery worldwide. * **SICS (Manual Small Incision Cataract Surgery):** Often compared to Phaco; it uses a 6–7 mm valvular tunnel. While faster than ECCE, it is still slower in recovery than Phacoemulsification. * **A-Constant:** A value specific to each IOL model used in biometry (SRK formula: $P = A - 2.5L - 0.9K$) to calculate IOL power. * **Most common complication:** Posterior Capsular Opacification (PCO), also known as "After Cataract," treated with YAG Laser Capsulotomy.

Q: Inverse hypopyon is seen in which of the following conditions?

Post vitreoretinal surgery with silicone oil. **Explanation:** **Correct Answer: C. Post vitreoretinal surgery with silicone oil** **Mechanism:** A standard hypopyon consists of inflammatory cells (pus) that settle at the **bottom** of the anterior chamber due to gravity, as these cells are heavier than aqueous humor. In contrast, **Inverse Hypopyon** (also known as "Reverse Hypopyon") occurs when emulsified **silicone oil** bubbles migrate from the vitreous cavity into the anterior chamber. Because silicone oil has a lower specific gravity than aqueous humor, it **floats**, collecting at the **top (superior aspect)** of the anterior chamber, mimicking an upside-down hypopyon. **Analysis of Incorrect Options:** * **A & B (Fungal and Bacterial Endophthalmitis):** These are severe intraocular infections. They result in a true hypopyon where exudates and white blood cells settle inferiorly due to gravity. * **D (Anterior Uveitis):** This is characterized by a breakdown of the blood-aqueous barrier. The resulting inflammatory cells settle at the 6 o'clock position (inferiorly), forming a standard hypopyon. **High-Yield Clinical Pearls for NEET-PG:** * **Silicone Oil Specific Gravity:** It is <1.0 (approx. 0.97), which is why it floats. * **Emulsification:** This is a late complication of silicone oil injection. Risk factors include long-term retention and the use of low-viscosity oil (1000 centistokes). * **Management:** If silicone oil causes secondary glaucoma or inverse hypopyon, it usually necessitates surgical removal (Silicone Oil Removal - SORP). * **Other "Inverse" signs:** Remember **Inverse Argyl Robertson Pupil** is seen in Adie’s tonic pupil (near-light dissociation where the reaction to light is better than to accommodation, though this is rare).

Q: A patient developed pain and severe vision loss 2 days after cataract surgery. On examination, a particular finding was noted. Which of the following statements about the given condition is INCORRECT?

It involves inflammation of all layers of the eyeball.. ***It involves inflammation of all layers of the eyeball.*** - **Endophthalmitis** affects only the **intraocular contents** (vitreous and aqueous humor), not all layers of the eyeball. - **Panophthalmitis** involves inflammation of all layers including the **sclera** and **orbital tissues**, which is different from endophthalmitis. *Systemic antibiotics are not useful.* - The **Endophthalmitis Vitrectomy Study (EVS)** demonstrated that **systemic antibiotics do not improve outcomes** in acute post-operative endophthalmitis. - **Intravitreal antibiotics** remain the gold standard treatment, with **vancomycin** and **ceftazidime** being commonly used. *Instillation of 5% povidone-iodine into conjunctival fornices is a good prophylactic treatment.* - **Povidone-iodine 5%** is highly effective in reducing **bacterial load** on the conjunctiva and lid margins before surgery. - It significantly **reduces the risk** of post-operative endophthalmitis when used as pre-operative antisepsis. *The incidence is 0.2-0.5%.* - The incidence of **acute post-operative endophthalmitis** after cataract surgery is indeed **0.2-0.5%** in most studies. - This represents a **rare but serious complication** that can lead to permanent vision loss if not treated promptly.

Q: Which of the following is not true regarding the treatment for chalazion?

Cryotherapy. **Explanation:** A **chalazion** is a chronic, non-infectious granulomatous inflammation of the Meibomian glands caused by the blockage of gland ducts and the stagnation of sebaceous secretions. **Why Cryotherapy is the Correct Answer:** Cryotherapy is **not** a treatment for chalazion. It is primarily used in ophthalmology for treating trichiasis (destruction of hair follicles), retinal cryopexy, or certain ocular surface malignancies. Using extreme cold on a chalazion would be ineffective for removing the lipogranulomatous material and could cause unnecessary damage to the eyelid margin and skin. **Analysis of Other Options:** * **A. Vertical Incision:** This is the standard technique. The incision is made on the palpebral conjunctival surface **vertically** (perpendicular to the lid margin) to avoid cutting across adjacent Meibomian glands, which prevents further ductal damage and scarring. * **B. Incision and Curettage (I&C):** This is the definitive surgical treatment. After a vertical incision is made using a chalazion clamp, a curette is used to thoroughly scrape out the jelly-like granulomatous material and the pseudocapsule. * **C. Biopsy in Recurrent Cases:** This is a critical clinical step. Recurrent chalazia in the same location, especially in elderly patients, can mimic **Sebaceous Cell Carcinoma**. Histopathological examination is mandatory to rule out malignancy. **High-Yield Clinical Pearls for NEET-PG:** * **Initial Treatment:** Conservative management (warm compresses and lid hygiene) works in about 50% of cases. * **Incision Site:** Always from the conjunctival side (vertical) unless the chalazion is pointing through the skin, in which case a horizontal incision is made to follow the skin creases (Langer’s lines). * **Steroid Injection:** Intralesional triamcinolone acetonide is an alternative for chalazia near the lacrimal punctum where surgery might risk canalicular damage.

Q: What is the treatment of choice for acute dacryocystitis?

Systemic antibiotics and analgesics. **Explanation:** **Acute Dacryocystitis** is a medical emergency characterized by an acute suppurative inflammation of the lacrimal sac, typically presenting with pain, redness, and swelling over the inner canthus. **Why Option C is Correct:** The primary goal in the acute phase is to control the infection and alleviate pain. Since the lacrimal sac is an enclosed space, inflammation leads to significant pressure and potential abscess formation. **Systemic antibiotics** (to cover Gram-positive organisms like *Staph. aureus* and *Streptococcus*) and **analgesics** (to manage pain) are the first-line treatments. Warm compresses are also used to encourage localization of the infection. **Why Other Options are Incorrect:** * **Option A (Massage):** Crigler’s massage is the treatment of choice for *Congenital Nasolacrimal Duct Obstruction (CNLDO)*, not acute infection. Massaging an acutely infected sac can lead to the spread of infection and orbital cellulitis. * **Option B (Syringing and Probing):** These are strictly **contraindicated** in the acute stage. Forcing fluid or a probe through an infected sac can cause trauma and disseminate the infection into the surrounding orbital tissues. * **Option D (Dacryocystorhinostomy - DCR):** While DCR is the definitive treatment for chronic dacryocystitis or the underlying NLD obstruction, it is **never** performed during the acute phase. Surgery is delayed until the infection has completely subsided (usually 4–6 weeks later). **High-Yield Clinical Pearls for NEET-PG:** * **Causative Organisms:** Most common is *Staphylococcus aureus*. * **Complication:** If left untreated, it can lead to **Lacrimal Abscess**, which may rupture to form a **Lacrimal Fistula**. * **Surgical Management:** If an abscess forms, it requires **Incision and Drainage (I&D)**. * **Definitive Treatment:** Once the acute episode resolves, **DCR** is the procedure of choice to prevent recurrence.

Question 1

Dacryocystorhinostomy is contraindicated in all EXCEPT?

Accepted Answer

Chronic dacryocystitis

Answer

Atrophic rhinitis

Answer

Deviated nasal septum (DNS)

Answer

Carcinoma of the lacrimal gland

Question 2

What is the treatment for nasolacrimal duct obstruction?

Accepted Answer

All of the above

Answer

Syringing

Answer

Probing

Answer

Dacryocystorhinostomy (DCR)

Question 3

Recovery in cataract surgery is fastest with which of the following procedures?

Accepted Answer

Phacoemulsification

Answer

Intracapsular cataract extraction (ICCE)

Answer

Extracapsular cataract extraction (ECCE)

Answer

Extracapsular cataract extraction (ECCE) with intraocular lens (IOL) implantation

Question 4

Inferior oblique muscle is most weakened by which surgical procedure?

Accepted Answer

Anteriorization

Answer

Disinsertion

Answer

Recession

Answer

Myotomy

Question 5

What technique of cataract extraction is used in the care of a subluxated lens?

Accepted Answer

Intracapsular Cataract extraction

Answer

Extracapsular Cataract extraction

Answer

Phacoemulsification

Answer

Small incision Cataract surgery

Question 6

Which method is used to visualize the periphery of the retina?

Accepted Answer

Indirect ophthalmoscopy

Answer

Direct ophthalmoscopy

Answer

Goniocopy

Answer

Contact lens

Question 7

Inverse hypopyon is seen in which of the following conditions?

Accepted Answer

Post vitreoretinal surgery with silicone oil

Answer

Fungal endophthalmitis

Answer

Bacterial endophthalmitis

Answer

Anterior uveitis

Question 8

A patient developed pain and severe vision loss 2 days after cataract surgery. On examination, a particular finding was noted. Which of the following statements about the given condition is INCORRECT?

Accepted Answer

It involves inflammation of all layers of the eyeball.

Answer

Systemic antibiotics are not useful.

Answer

Instillation of 5% povidone-iodine into conjunctival fornices is a good prophylactic treatment.

Answer

The incidence is 0.2-0.5%.

Question 9

Which of the following is not true regarding the treatment for chalazion?

Accepted Answer

Cryotherapy

Answer

Vertical incision

Answer

Incision and curettage

Answer

Biopsy in recurrent cases

Question 10

What is the treatment of choice for acute dacryocystitis?

Accepted Answer

Systemic antibiotics and analgesics

Answer

Massage over the lacrimal sac

Answer

Syringing and probing

Answer

Dacryocystorhinostomy

Ophthalmic Surgery — MCQs

Ophthalmic Surgery — MCQs

On this page

Practice by Chapter

Want unlimited practice?