Fundus Biomicroscopy Again Flashcards
If you follow the superior nasal arcade, are you moving away or towards the ONH? Using condensing lenses
Move temporal and inferior
Image is inverted and upside down
Flow of funds exam
- Focus on optic nerve
- Follow superior nasal arcade. Come back to ONH
- Following the inferior nasal arcades, come back to ONH
- Following the superior temporal arcades temporally
- Follow inferior temporal area adds nasally, coming back to ONH
- Focus on the macula, perform the Watze-allen slit beam test
Watzke-Allen slit beam test
Create a small thin vertical beam and scan over the macula, asking them if they notice curves or gaps in the slit. If they do see it, its a + Watzke-Allen sign.
Do it two meridians
What info does the Watzke-Allen slit beam test give us
- macular holes
- technique for preoperativley determining visual prognosis
Very important
Which of the following is a + watzke allen sign
- beam is reported as thinned in both vertical and horizontal orientations when placed directly over the center of the macular hole
- beam is reporterd as broken in both vertical and horizontal orientations
- beam is reported as broken in one orientation and thinned in the other
- beam is reported as kinked but not thinned or broken
All of them
Which of the following + watzke allen do you think would be a predictor for a favorable post op surgical outcome for a macular hole?
Beam is reported as thinned in both vertical and horizontal orientations when placed directly over the center f the macular hole
Which of the following + watzke allen do you think would be a predictor for an unfavorable post op outcome for a macular hole
Beams is reported as broken in both vertical and horizontal orientations
How does the surgeon treat a macular hole?
Vitrectomy
- vitreous removed that is pulling on macula
- gas bubble is placed inside the eye
- have patient look down (bubble position)
What causes macular hole
Tangential traction
