Shared Flashcard Set

Details

Opt 210 Test 1
90/78 and Pharmaceuticals
40
Other
Not Applicable
10/14/2007

Additional Other Flashcards

 


 

Cards

Term
Which way should the letters on the lens face during 90/78?
Definition
away from you
Term
How should the slit lamp be set up?  What angle displacement, what type of beam, light intensity, filter?
Definition
0 degrees displacement, parallelpiped beam, low to medium intensity, 10X mag, yellow filter
Term

What are some advantages of 90/78/60? 

Definition
1.  larger field of view than direct
2.  view is independent of refractive error
3.  stereoscopic
4.  view is independent of media opacities
Term
What new lens offers the widest pan equatorial field of view?
Definition
Super pupil
Term
What lens offers the highest resolution, the highest mag, and is most often used for the central retina?
Definition
Super 66
Term
What lens would be used for a small pupil?
Definition
vitreofundus
Term
How far away from the cornea should the 90/78/60 lens be?
Definition
5 mm and in the light path
Term
When you pull the slit lamp back during 90/78/60 what comes into focus first? second?  third?
Definition
1.  Noncontact lens fundus
2.  blurry red reflex
3.  retinal image
Term
What type of filter would you use if the patient had a nerve fiber layer defect or a retinal lesion?
Definition
red free filter
Term
What type of filter would you use if the patient is photophobic?
Definition
Yellow filter
Term
What is the number 1 cause for malpractice?
Definition
misdiagnosis of extraocular retinal detachment and OAG tumours
Term
What do the majority of malpractice claims against ODs involve?
Definition
failure to use diagnositc drops
Term
What does punctal occlusion or passive lid closure do to systemic absorption?
Definition
decreases systemic absorption
Term
What effect does punctal occulsion or passive lid closure have on the duration of medication on the ocular surface?
Definition
It increases the duration on the ocular surface
Term
What effect does iris color have on absorption of medication?
Definition
Darker irises absorb more of the medication
Term

Besides pain, what are two other reasons to use proparacaine hydrochloride?

Definition
1.  reduce washout of the subsequent drug by tearing
2.  to open the intracellular space and aid in drug penetration
Term
What are two problems with prolonged use of proparacaine?
Definition
1)  corneal opacification
2)  may delay wound healing
Term
When would you use fluress (fluoroscein dye plus proparacaine) clinically?
Definition
1)  tonometry
2)  foreign body removal
3)  to help visualize the foreign body
Term
Where does fluroscein pool?
Definition

Fluroscein pools in the epithelial defect

Term
What are three clinical indications for fluroscein dye?
Definition
1.  epithelial breaks
2.  TBUT
3.  anything that requires dye but no need for anaesthesia
Term

How do you recognize a dry spot when using fluoroscein dye?

Definition
1)  the darker areas on the cornea is where the tear film breaks up
Term
What pharmacological agent has the side effect of staining the conjunctiva and eyelids?
Definition
rose bengal
Term

What pharmacological stain interacts with the impaired mucin layer on the epithelial surface?

Definition
rose bengal
Term
What pharmacological agent stains the dead and devitalized corneal and conjunctival cells?
Definition
rose bengal
Term
What staining agent is most often used in dry eye treatment?
Definition
rose bengal
Term
If a patient has herpes simplex keratitis, what staining agent would you use to evaluate damaged or dead corneal cells?
Definition
rose bengal
Term
How long will a patients eye be stained after using rose bengal?
Definition

30 minutes

Term
What is the main advantage of lissamine green over rose bengal?
Definition
Lissamine green causes less patient discomfort
Term
In evaluating a patient for narrow angle closure, what value on the von Herrick test would indicate a risk of angle closure?
Definition
Grade II von Herrick angle or less
Term
What would indicate a risk of angle closure in gonioscopy?
Definition
Half or less of the trabecula visible in all four quadrants
Term
How much does the patient IOP need to increase after dilation before you begin to monitor him until dilation stops?
Definition
1)  5 mmHg
Term
What is paralysis of the ciliary muscle and loss of accomodation?
Definition
cycloplegia
Term
What is dilation of the pupil?
Definition
mydriasis
Term
What is tropicamides mode of action?
Definition
Anticholinergic, blocks the muscarinic receptors in the eye muscles
Term
How long does dilation with cyclopentolate last?
Definition
6-24 hours
Term
How long does dilation with homatropine last?
Definition
1-3 days
Term
How long does dilation with scopolamine last?
Definition

3-7 days

Term
How long does dilation with atropine last?
Definition
7 days
Term
What are colored halos around lights a potential sign of?
Definition

You closed the patients angle

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