Oculoplasty Practice Questions

Q: Which condition is characterized by an extra row of eyelashes growing from the meibomian gland orifices, typically located along the posterior border of the grey line?

Distichiasis. ***Distichiasis*** - This condition involves the growth of an **accessory row of eyelashes** from the meibomian glands, typically located along the posterior border of the **grey line** of the tarsal plate. - These eyelashes are often **thinner** and **shorter** than normal lashes and can cause ocular irritation. *Tylosis* - This term refers to the **thickening** and hardening of the skin, often associated with a chronic inflammatory process, but it does not specifically describe an extra row of eyelashes. - It more commonly refers to skin conditions like **palmar-plantar keratoderma** or chronic inflammation leading to thickening. *Madarosis* - This condition is characterized by the **loss of eyelashes** (or eyebrows), which is the opposite of having an extra row. - It can be caused by various factors, including local skin conditions, systemic diseases, or trauma. *Trichiasis* - This condition involves the **misdirection of normally placed eyelashes** so that they rub against the cornea, leading to irritation and potential corneal damage. - Unlike distichiasis, there is no extra row of lashes; rather, existing lashes are misdirected.

Q: A child has ptosis and poor levator function. What surgery will you do?

Frontalis suspension surgery. ***Frontalis suspension surgery*** - This procedure is indicated for **severe ptosis** with **poor levator function** (typically <4 mm), as the levator muscle is too weak to lift the eyelid effectively. - It uses the **frontalis muscle** (forehead muscle) to elevate the eyelid, connecting the eyelid to the eyebrow, which is a suitable approach when the primary elevator is compromised. *Mullerectomy* - This procedure excises the **Müller's muscle** and a small portion of conjunctiva for **mild ptosis** and should only be performed when **good levator function** is present. - It relies on an intact **sympathetic innervation** to the Müller's muscle and is ineffective in cases of poor levator function. *Fasanella Servat surgery* - This procedure involves resecting the **tarsus** and **conjunctiva** along with Müller's muscle and is indicated for **mild ptosis** with **good levator function**. - It is not suitable for cases where there is significant weakness of the levator palpebrae superioris muscle. *Levator muscle resection* - This involves shortening the **levator palpebrae superioris muscle** and is indicated for **moderate to severe ptosis** but only when there is **fair to good levator function** (generally >5 mm). - It relies on the presence of sufficient residual function in the levator muscle to achieve satisfactory lift, which is absent in this child's case.

Q: Dalrymple's sign of ocular Graves' disease refers to which of the following?

Retraction of the upper lid. ***Retraction of the upper lid*** - **Dalrymple's sign** specifically refers to the **wide-eyed stare** seen in **Graves' ophthalmopathy** due to **retraction of the upper eyelid**. - This symptom is caused by sympathetic overactivity of the **levator palpebrae superioris muscle**. *Lid lag* - **Lid lag (Graefe's sign)** is a different ocular sign where the **upper eyelid lags behind the globe** on downward gaze. - While also seen in **Graves' disease**, it is distinct from constant upper lid retraction. *Proptosis* - **Proptosis**, or **exophthalmos**, is the **forward protrusion of the eyeball** from the orbit. - This is a common feature of **Graves' ophthalmopathy**, but it is not what Dalrymple's sign refers to. *Convergence insufficiency* - **Convergence insufficiency (Moebius sign)** refers to the **inability to maintain convergence** during near vision. - While this can occur in **thyroid eye disease**, it is not Dalrymple's sign.

Q: What is the most common cause of eyelid ptosis in children?

Congenital ptosis. ***Congenital ptosis*** - **Congenital ptosis** is the most frequent cause of a droopy eyelid in children, present from birth due to **dysgenesis (developmental abnormality) of the levator palpebrae superioris muscle**. - It accounts for the **majority of pediatric ptosis cases** and often presents as an isolated finding with varying degrees of severity. - Can impact vision development if the eyelid covers the pupil, potentially leading to **amblyopia** (lazy eye). *Myasthenia gravis* - While it can cause ptosis, **myasthenia gravis** is a rare autoimmune neuromuscular disorder in children, with ptosis that typically **fluctuates** throughout the day. - The ptosis classically **worsens with fatigue** and improves with rest, unlike congenital ptosis which is static and non-fatigable. - Usually associated with other signs of muscle weakness including extraocular muscle involvement. *Idiopathic* - The term "idiopathic" refers to ptosis of **unknown etiology**; however, in pediatric cases, most ptosis can be attributed to a **specific identifiable cause**, most commonly congenital levator muscle dysgenesis. - This makes "idiopathic" an imprecise diagnosis when **congenital ptosis** represents a specific, well-defined developmental abnormality. *Paralysis of 3rd nerve* - A **3rd nerve (oculomotor) palsy** causes ptosis due to paralysis of the levator muscle, but is **less common than congenital ptosis** in children. - Typically accompanied by other characteristic signs: **pupil dilation, impaired adduction, elevation, and depression** of the eye. - When present in children, usually results from trauma, tumors, congenital anomalies, or vascular causes, presenting with a broader clinical picture beyond isolated ptosis.

Q: At which anatomical location is the opening created in dacryocystorhinostomy?

Middle meatus. ***Middle meatus*** - In **dacryocystorhinostomy (DCR)**, the anastomosis is created between the **lacrimal sac** and the nasal cavity at the level of the **middle meatus**. - The lacrimal sac is located **lateral to the middle turbinate**, making this the anatomically appropriate site for creating the surgical opening. - This placement allows direct drainage of tears from the lacrimal sac into the nasal cavity, **bypassing the obstructed nasolacrimal duct**. - The **middle meatus** provides optimal access and physiological tear drainage. *Inferior meatus* - The **nasolacrimal duct** naturally drains into the **inferior meatus** under normal anatomy. - However, DCR is performed to **bypass** an obstructed nasolacrimal duct, so the anastomosis is created more **superiorly** at the lacrimal sac level. - The inferior meatus is **below** the level of the lacrimal sac and would not provide direct access to it. *Superior meatus* - The **superior meatus** is located above the superior turbinate and receives drainage from the **posterior ethmoidal sinuses**. - This location is **too superior** for DCR and does not correspond to the anatomical position of the lacrimal sac. *Sphenoethmoidal recess* - The **sphenoethmoidal recess** is the most superior and posterior area, receiving drainage from the **sphenoid sinus**. - This location is far too **superior and posterior** to be used for lacrimal drainage surgery.

Q: Hordeolum internum is?

Acute infection of Meibomian gland. ***Acute infection of Meibomian gland*** - A **hordeolum internum** is an acute, purulent infection of the **Meibomian glands**, which are sebaceous glands located within the tarsal plate of the eyelid. - The infection primarily manifests on the **inner surface of the eyelid** due to the gland's location, causing localized inflammation and pain. *Acute infection of Zeis gland* - An acute infection of a **Zeis gland** (a sebaceous gland connected to an eyelash follicle) is known as a **hordeolum externum**, or external stye. - Unlike a hordeolum internum, a **hordeolum externum** usually points externally at the lid margin. *Acute infection of Moll gland* - An acute infection of a **Moll gland** (apocrine sweat glands located near the lid margin) is also a type of **hordeolum externum**. - While it's an acute infection of an eyelid gland, it is not specifically referred to as a **hordeolum internum**. *Chronic infection of Zeis gland* - A chronic infection of a **Zeis gland** is not a typical designation for eyelid lesions; chronic inflammatory processes of sebaceous glands often lead to conditions like a **chalazion**, though chalazia are more commonly associated with Meibomian glands. - This option incorrectly identifies the gland for a hordeolum internum and specifies **chronic infection**, whereas a hordeolum is inherently **acute**.

Q: Surgery of choice for chronic acquired dacryocystitis

Dacryocystorhinostomy. ***Dacryocystorhinostomy*** - This procedure creates a new connection between the **lacrimal sac** and the **nasal cavity**, bypassing the obstructed nasolacrimal duct. - It is the **surgery of choice** for chronic acquired dacryocystitis as it provides a permanent solution for tear drainage. *Dacryocystectomy* - This involves **excision of the lacrimal sac**, which can relieve symptoms of infection but eliminates the sac's function. - It is generally reserved for cases where dacryocystorhinostomy is contraindicated or has failed, and is **not the primary choice** for restoring tear flow. *Conjunctivo-cystorhinostomy* - This procedure creates a bypass from the **conjunctiva** directly to the **nasal cavity**, typically used when the canaliculi are also obstructed. - It is a more complex surgery indicated for **proximal lacrimal system obstruction** (e.g., canalicular block) rather than isolated nasolacrimal duct obstruction. *None of the options* - **Dacryocystorhinostomy** is the well-established and most effective surgical intervention for chronic acquired dacryocystitis. - Therefore, this option is incorrect as there is a suitable surgical choice available.

Q: In congenital dacryocystitis, the blockage occurs at?

Nasolacrimal duct. ***Nasolacrimal duct*** - **Congenital dacryocystitis** is primarily caused by an obstruction in the **nasolacrimal duct**, specifically at the **valve of Hasner** at its distal end near the inferior meatus. - This blockage prevents the proper drainage of tears into the nasal cavity, leading to tear overflow (epiphora), mucoid discharge, and potential secondary infection. - Present in approximately **5-6% of newborns**, with most cases resolving spontaneously by 12 months of age. *Punctum* - Congenital **punctal agenesis** is rare and not the typical site of obstruction in congenital dacryocystitis. - The puncta are usually patent in this condition. *Lacrimal canaliculi* - Obstruction of the **lacrimal canaliculi** is uncommon in congenital cases. - Canalicular obstruction is more often acquired (trauma, infection, medications). *Lacrimal sac* - The **lacrimal sac** itself is not the site of primary obstruction in congenital dacryocystitis. - The sac may become distended due to downstream obstruction at the nasolacrimal duct.

Q: What is the preferred treatment for congenital ptosis with poor levator muscle function?

Muscle suspension technique. ***Muscle suspension technique*** - For congenital ptosis with **poor levator function** (typically 5 mm excursion). - It involves strengthening the existing levator muscle, which would be ineffective in cases of poor function. *Conservative management* - **Conservative management** is generally reserved for **mild ptosis** or when surgical intervention is not immediately necessary, often involving observation. - It is **not appropriate** for congenital ptosis with poor levator function that often leads to **amblyopia** if left untreated. *Direct muscle repair* - Direct muscle repair is not a standard term for ptosis surgery; surgical procedures like **levator resection** or **aponeurotic repair** modify the levator muscle. - In cases of **poor levator function**, directly repairing or strengthening a severely compromised muscle is **unlikely to yield effective eyelid elevation**.

Question 1

Which condition is characterized by an extra row of eyelashes growing from the meibomian gland orifices, typically located along the posterior border of the grey line?

Accepted Answer

Distichiasis

Answer

Tylosis

Answer

Madarosis

Answer

Trichiasis

Question 2

A child has ptosis and poor levator function. What surgery will you do?

Accepted Answer

Frontalis suspension surgery

Answer

Mullerectomy

Answer

Fasanella Servat surgery

Answer

Levator muscle resection

Question 3

Dalrymple's sign of ocular Graves' disease refers to which of the following?

Accepted Answer

Retraction of the upper lid

Answer

Lid lag

Answer

Proptosis

Answer

Convergence insufficiency

Question 4

Dacryocystorhinostomy involves?

Accepted Answer

Connecting the lacrimal sac to the nose by opening the medial wall

Answer

Opening the terminal blocked end of the nasolacrimal duct

Answer

Complete excision of the lacrimal sac

Answer

Insertion of a drainage tube in the lacrimal sac

Question 5

What is the most common cause of eyelid ptosis in children?

Accepted Answer

Congenital ptosis

Answer

Myasthenia gravis

Answer

Idiopathic

Answer

Paralysis of 3rd nerve

Question 6

At which anatomical location is the opening created in dacryocystorhinostomy?

Accepted Answer

Middle meatus

Answer

Superior meatus

Answer

Sphenoethmoidal recess

Answer

Inferior meatus

Question 7

Hordeolum internum is?

Accepted Answer

Acute infection of Meibomian gland

Answer

Chronic infection of Zeis gland

Answer

Acute infection of Moll gland

Answer

Acute infection of Zeis gland

Question 8

Surgery of choice for chronic acquired dacryocystitis

Accepted Answer

Dacryocystorhinostomy

Answer

Dacryocystectomy

Answer

Conjunctivo-cystorhinostomy

Answer

None of the options

Question 9

In congenital dacryocystitis, the blockage occurs at?

Accepted Answer

Nasolacrimal duct

Answer

Punctum

Answer

Lacrimal canaliculi

Answer

Lacrimal sac

Question 10

What is the preferred treatment for congenital ptosis with poor levator muscle function?

Accepted Answer

Muscle suspension technique

Answer

Muscle advancement procedure

Answer

Conservative management

Answer

Direct muscle repair

Oculoplasty — MCQs

Oculoplasty — MCQs

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