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Methods BLOCK 7 > Biomicroscopy > Flashcards

Flashcards in Biomicroscopy Deck (21)
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1

What are the 3 most important illumination techniques

Diffuse
Parallelpiped
Optic section

2

What do you use diffuse for

Large structures

3

What do you use parallepiped for

Cornea and lens eval

4

What do you use optic section for

Corneal endothelium and anterior chamber angle assessment

5

Examination routine

-imparts to develop a routine slit lamp examination protocol
-sequential observation
-nothing overlooked and all structures are examined for abnormality
-anterior to posterior

6

Logical sequence for examination routine

Most anterior aspect of eye and work your way back
-light source positioned to the left when examining structures to the examiners left of the midline

7

What light do you use for lids

Diffuse, low mag

8

How do you fully examine upper lids

Eversion

9

How do you invert upper lid

From the temporal side completely to the most nasal side

10

Technique of eyelid eversion

-pt look down
-grasp lashes
-pull down and slightly away from globe
-create crease above the tarsal plate and flip
-use thumb to firmly pin outer lid margin/lashes against the bony orbit
-complete version by moving temporal to nasal
-giv egood instructions
-do not alarm pt
-tell pt to look down art all times

11

Reasons for everything the upper lids

1. Prospective and establishes contact lens patients (GPC)
2. Irritation and seasonal allergies
3. Removal of a lost or possible lost CL
4. A forgein body location/removal
5. Eval the apex of internal and external hordeolums
6. Eval the internal apex of chalaxions

12

Documentation of an ocular lesion

-description
-location
-severity

13

Corneal lesions

Most corneal scars will appear whitish in color. Rust from a metallic body may have a reddish-orange hue

14

Neovascularization

Indicates trauma and or hypoxia
-not uncommon to see it on the superior portion of the cornea in contact lens wearers

15

What light for iris

Direct illumination

16

When is it best to look at iris

Before dilation

17

What angle does the light need to be at for van herrick angle estimation

60 degrees

18

Van herrick

Light at 60 degrees
High mag
High light
Optic section

19

Light for lens

Direct illumination or optic

20

Abnormal findings on slit lamp


-become familiar with what is normal
-describe and record appropriately
-WHAT WHERE SEVERITY

21

Grading scales and abnormal findings on slit lamp

-some variability in grading among different observers
-very subjective but must remain consistent for an individual examiner