124. Basic Ophthalmic Surgical Procedures Flashcards
What is the primary function of the eyelids in dogs and cats? A. Tear production B. Protecting the ocular surface C. Enhancing vision D. Regulating intraocular pressure
B. Protecting the ocular surface
Which of the following muscles is responsible for elevating the superior eyelid? A. Levator palpebrae superioris B. Orbicularis oculi C. Malaris muscle D. Frontalis muscle
A. Levator palpebrae superioris
Which nerve provides sensation to the eyelids and corneal surface? A. Facial nerve B. Trigeminal nerve C. Oculomotor nerve D. Vagus nerve
B. Trigeminal nerve
The most common complication of retrobulbar blocks is: A. Retrobulbar hemorrhage B. Globe perforation C. Optic nerve damage D. Infection
A. Retrobulbar hemorrhage
Which of the following is a contraindication for performing a retrobulbar block? A. Diabetes mellitus B. Blepharitis C. Local infection D. Corneal ulceration
C. Local infection
Which of the following is most effective in preventing the oculocardiac reflex during ocular surgery? A. Glycopyrrolate B. Lidocaine C. Epinephrine D. Phenylephrine
A. Glycopyrrolate
During ophthalmic surgery, why is ocular lubrication necessary? A. To enhance anesthesia B. To reduce infection C. To prevent corneal desiccation D. To dilate the pupil
C. To prevent corneal desiccation
What is the recommended dilution ratio for povidone-iodine solution used in presurgical preparation of the eye? A. 1:10 B. 1:20 C. 1:30 D. 1:50
D. 1:50
Which of the following agents is most suitable for corneal irrigation during surgery? A. Normal saline B. Povidone-iodine scrub C. Hydrogen peroxide D. Alcohol
A. Normal saline
What position is preferred for most adnexal and orbital procedures in dogs? A. Sternal recumbency B. Dorsal recumbency C. Lateral recumbency D. Ventral recumbency
A. Sternal recumbency
The most common eyelid tumor in dogs is: A. Melanoma B. Squamous cell carcinoma C. Meibomian gland adenoma D. Histiocytoma
C. Meibomian gland adenoma
Which of the following is the recommended suture pattern for closing a wedge resection in the eyelid? A. Simple interrupted B. Continuous horizontal mattress C. Cruciate D. Purse-string
A. Simple interrupted
What is the most common congenital eyelid abnormality in cats? A. Ectropion B. Entropion C. Eyelid agenesis D. Ankyloblepharon
C. Eyelid agenesis
Which of the following antibiotics is typically used for postoperative topical application in ophthalmic surgery? A. Amoxicillin B. Ciprofloxacin C. Neomycin D. Doxycycline
C. Neomycin
Entropion in cats often requires which of the following surgical approaches? A. V-Y plasty B. Hotz-Celsus procedure C. Conjunctival graft D. Wedge resection
B. Hotz-Celsus procedure
What is the primary purpose of a retrobulbar block during enucleation? A. Decrease intraocular pressure B. Enhance pupil dilation C. Provide analgesia and slightly exteriorize the globe D. Reduce corneal reflex
C. Provide analgesia and slightly exteriorize the globe
Which nerve is responsible for motor innervation of the orbicularis oculi muscle? A. Oculomotor nerve B. Trigeminal nerve C. Facial nerve D. Optic nerve
C. Facial nerve
The most common cause of ankyloblepharon in kittens is: A. Conjunctivitis B. Herpesvirus infection C. Eyelid agenesis D. Lacrimal duct obstruction
B. Herpesvirus infection
A chalazion is best treated by: A. Cryotherapy B. Chalazion curettage C. Antibiotic ointment D. Enucleation
B. Chalazion curettage
In dogs, what percentage of eyelid tumors are benign? A. 25% B. 50% C. 73% D. 90%
C. 73%
Temporary tarsorrhaphy is primarily used to: A. Correct ectropion B. Protect the cornea during healing C. Reduce intraocular pressure D. Enhance tear production
B. Protect the cornea during healing
What is the first-line treatment for keratoconjunctivitis sicca in dogs? A. Topical antibiotics B. Cyclosporine or tacrolimus C. Corticosteroid injections D. Surgical correction
B. Cyclosporine or tacrolimus
Which surgical technique is recommended for removing small meibomian gland tumors? A. Cryotherapy B. Laser ablation C. Wedge resection D. Electrocautery
C. Wedge resection
When performing eyelid surgery, what type of suture material is preferred for closing the skin? A. Polypropylene B. Polyglactin C. Catgut D. Silk
B. Polyglactin
Which of the following is a key indication for performing a permanent medial canthoplasty? A. Entropion B. Ectropion C. Euryblepharon D. Lagophthalmos
C. Euryblepharon
Which of the following is the most common eyelid tumor in cats? A. Meibomian gland adenoma B. Squamous cell carcinoma C. Melanoma D. Histiocytoma
B. Squamous cell carcinoma
The Hotz-Celsus procedure is primarily used to treat: A. Ectropion B. Entropion C. Lagophthalmos D. Distichiasis
B. Entropion
During corneal surgery, a lightweight eyelid speculum used to retract the eyelids is: A. Castroviejo speculum B. Barraquer wire speculum C. Chalazion clamp D. Jaeger lid plate
B. Barraquer wire speculum
Which of the following is the correct treatment for ectopic cilia? A. Manual epilation B. Cryoepilation C. Chalazion curettage D. Enucleation
B. Cryoepilation
The muscle responsible for closing the eyelids is the: A. Levator palpebrae superioris B. Orbicularis oculi C. Frontalis D. Malaris
B. Orbicularis oculi
The oculocardiac reflex is best prevented by: A. Administering atropine preoperatively B. Using topical anesthetic drops C. Applying a warm compress D. Placing an Elizabethan collar
A. Administering atropine preoperatively
What is the primary purpose of using a chalazion clamp during eyelid surgery? A. Prevent bleeding B. Increase corneal exposure C. Stabilize the eyelid D. Elevate the third eyelid
C. Stabilize the eyelid
The most common congenital nasolacrimal duct anomaly in dogs is: A. Punctal aplasia B. Ectopic puncta C. Nasolacrimal cysts D. Canalicular atresia
A. Punctal aplasia
A commonly used antibiotic for prophylaxis during ophthalmic surgery is: A. Enrofloxacin B. Amoxicillin C. Cefazolin D. Doxycycline
C. Cefazolin
A nasolacrimal duct flush is typically performed to: A. Diagnose corneal ulcers B. Relieve epiphora C. Remove foreign bodies from the eye D. Assess tear production
B. Relieve epiphora
Which of the following instruments is essential for eyelid margin repair? A. Castroviejo needle holder B. Stevens tenotomy scissors C. Barraquer wire speculum D. Derf needle holder
A. Castroviejo needle holder
In cases of entropion correction in cats, how should the correction be estimated? A. Underestimate the correction B. Exact measurement based on rolling C. Overestimate the correction D. No correction required
C. Overestimate the correction
Which of the following structures is NOT part of the nasolacrimal system? A. Lacrimal gland B. Canaliculi C. Sclera D. Puncta
C. Sclera
The Schirmer tear test is primarily used to assess: A. Intraocular pressure B. Tear production C. Corneal sensitivity D. Retinal function
B. Tear production
Which muscle retracts the globe in dogs during anesthesia? A. Retractor bulbi muscle B. Levator palpebrae superioris C. Orbicularis oculi D. Malaris muscle
A. Retractor bulbi muscle
A commonly used surgical procedure for correcting lagophthalmos is: A. Tarsorrhaphy B. Conjunctivoplasty C. Keratoplasty D. Blepharoplasty
A. Tarsorrhaphy
Which of the following is a common cause of acquired nasolacrimal duct obstruction? A. Congenital agenesis B. Foreign bodies C. Ectopic cilia D. Retinal detachment
B. Foreign bodies
Which of the following surgical techniques is most effective for deep corneal ulcers? A. Conjunctival graft B. Hotz-Celsus procedure C. Cryotherapy D. Enucleation
A. Conjunctival graft
Which of the following surgical flaps is commonly used for large upper or lower eyelid defects? A. Sliding pedicle advancement flap B. Lip-to-lid flap C. Semicircular flap D. V-Y plasty
C. Semicircular flap
For surgical removal of a meibomian gland adenoma, the best approach is: A. Cryoablation B. Wedge resection C. Laser ablation D. Electrocautery
B. Wedge resection
The gland of the third eyelid contributes approximately what percentage of tear production? A. 10% B. 20% C. 35% D. 50%
C. 35%
What is the recommended treatment for severe keratoconjunctivitis sicca unresponsive to medical therapy? A. Conjunctival graft B. Parotid duct transposition C. Enucleation D. Retrobulbar block
B. Parotid duct transposition
Ectopic cilia most commonly cause which of the following symptoms? A. Corneal ulceration B. Decreased tear production C. Retinal detachment D. Epiphora
A. Corneal ulceration
Which of the following antibiotics is commonly used in postoperative ophthalmic ointments? A. Ciprofloxacin B. Neomycin C. Vancomycin D. Chloramphenicol
B. Neomycin
For temporary relief of epiphora due to nasolacrimal duct obstruction, which of the following is most effective? A. Normograde flushing B. Retrograde flushing C. Topical corticosteroids D. Cryotherapy
A. Normograde flushing
What is the common term for prolapse of the nictitating membrane gland?
Cherry eye
At what age does prolapse of the nictitating membrane gland typically occur in dogs?
Before 2 years of age
Which breeds are commonly affected by prolapse of the nictitating membrane gland?
Cocker Spaniels, Lhasa Apsos, Bulldogs, Pekingese
What is the appearance of a prolapsed nictitating membrane gland?
Smooth pink or red mass
What is a common complication if a prolapsed nictitating membrane gland is left untreated?
Chronic conjunctivitis
What is the preferred treatment for prolapse of the nictitating membrane gland?
Surgical repositioning
Why is excision of the prolapsed nictitating membrane gland generally not recommended?
Because the gland contributes to tear production
Which surgical technique is described by the Kaswan and Martin method?
Orbital rim anchoring technique
What suture material is typically used for the Kaswan and Martin technique?
Nonabsorbable 4-0 monofilament
In the Morgan pocket technique, what is created to reposition the gland?
A conjunctival pocket