Chapter 16 - Ophthalmic Quiz Answers

Which retinal structure allows for perception of general shapes and shades of gray in dim light

Rods

What kind of anesthetic block is used for a vitrectomy procedure

Retrobulbar

Perfluoropropane and sulfur hexafluoride are used to

Keep pressure on the retina

Which of the following is a pharmacologic agent that constricts the pupil of the eye

Acetylcholine

A trephine is used in which ophthalmologic procedure

Keratoplasty

Which sterile irrigation fluid is used for ophthalmic procedures

BSS

The normal condition of the lens of the eye is

Transparent and bioconvex

What is another name for the traction sutures used to manipulate the globe of the eye

Bridle

Which of the following represents the replacement device for the cataract lens in the eye

IOL

Where is the lacrimal gland located

Upper lid, outer angle of the orbit

Into which structures do the lacrimal ducts drain tears

Nasal cavity

Which procedure done on an eye with internal malfunction or loss of contents and no possible recovery of sight provides better mobility and cosmetic results with a prosthetic eye

Evisceration

Which procedure surgically treats glaucoma

Iridectomy

What is the portion of the eye between the cornea and the iris in which aqueous fluid flows and nourishes tissues

Anterior chamber

What is another name for a cystic structure caused by an inflammatory response to material trapped in a meibomian gland

Chalazion

Which of the following is an inward turning of the eyelid with resulting corneal irritation

Entropian

Which instrument is used to remove the cataract lens in preparation for intraocular lens placement

Phacoemulsification hand piece

Which of the following is the name of locking or non-locking needle holders frequently used in ophthalmology

Castroviejo

Which of the following scissors would NOT be used for ophthalmologic procedures

Jorgenson

What passes through the canal of schlemm

Aqueous humor

Misalignment or deviation from coordinated movement of the eyes is

Strabismus

If looking at the right eye of a patient and assigning clock position of 12,3,6,and 9 o'clock to the rectus muscles, which of the following would be correct

12=superior, 3=medial, 6=inferior, 9=lateral

Which of the following is the term for "crossed eyes"

Estropia

Which structure of the eye is colored and its muscles constrict or relax to control the amount of light entering the pupil

Iris

How many tunics comprise the structure of the globe of the eye

Three

Which two structures form the outer tunic of the globe of the eye

Cornea and sclera

Which procedure involves adjusting sutures after the patient has recovered completely from anesthesia, but within 24 hours

Recession/resection

Which structure of the eye is the thin, transparent lining of the inner surface of the eyelid and covers the sclera

Conjunctiva

Which of the following is NOT used for visualization in ophthalmologic procedures

Colposcope

Which of the following names represents an eye speculum that resembles an uncoiled metal paper clip

Barraquer

All of the following are methods of intracular lens insertion Except

Fan-folded through small incision

How would a definitive diagnosis of detached retina be obtained if hemorrhage is present in the eye

Surgical vitrectomy

What is the name of the gelatin-like fluid that fills the posterior cavity of the eye

Vitreous humor

For which surgical procedure would an Ocutome be used

Vitrectomy

Which substance is used following vitrecomy for long-term support of the retina with fewer restrictions on position

Silicone oil

What is the name of the membrane that contains and encloses the vitreous humor in the posterior cavity

Hyaloid

Where would a Veir rod be placed to relieve or prevent obstruction

Canaliculus

What is the condition of the lens that is treated by cataract extraction

Opacified

In which of the following procedures would sutures most likely NOT be necessary

Extracapsular cataract extraction

What is the name of the opening created in the outer tunic for tunic insertion of the infusion cannula for excision of vitreous

Sclerotomy

What is the name of the structure that is small depression containing only cones and has the highest visual acuity

Central fovea

Tetracaine drops are used in ophthalmologic procedures to

Numb the surface of the eye and surrounding structures

Which of the following techniques uses a laser to treat retinal tears or proliferative diabetic retinopathy

Endophotocoagulation

Which procedure may be done in conjunction with vitrectomy if the surgeon is unable to gain visualization of the posterior cavity of the eye

Lensectomy

What is the term for the six muscles that provides movement of the eye

Extrinsic

Which of the following is an intraocular procedure

Vitrectomy

What structure is avascular, external, and its function is to retract light rays

Cornea

What structure has four layers: epithelial cells, substantia propria, elastic lamina, and endothelial cells

Cornea

Which type of needle is frequently used in ophthalmologic procedures

3/8 circle spatula

Crypotherapy uses which of the following to seal retinal tears and holes

Cold