Card Set Information

2014-10-20 09:36:46
Show Answers:

  1. Set-up intial
    • narrow p'ped or even OS
    • observation + illumination arm coaxial (i.e. 0deg)
    • low intensity
    • low mag
  2. procedure
    • line up light beam with px pupil
    • give px fixation targer
    • focus slit on cornea or TF
    • position CL in front of px eye
    • pull back
  3. when pulling back we focus on
    • scratches on the lens
    • blurry rectangular orange patch
    • bright + more in focus + b.v. = on retina
  4. once we see b.v. we can
    widen width of illumination to a slightly thicker p'ped to scan retina easier
  5. when we do px RE, px is to focus on
    optom right ear
  6. when px looking at corresponding optom ear, optom can see the __ when SL in focus
  7. once post. pole assessed, we assess the
    superior, inf, nasal and temporal fundus
  8. which part of the retina is left till last?
  9. we can see more periphery by asking px to look
    up, down, left, right
  10. If we want to see more detail, we should
    increase the mag on the SL
  11. What to observe
    • NRR
    • C/D
    • any lesions
    • any elevations/depressions
  12. How to assess the NFL?
    Use the red-free filter
  13. Standard 90D lens has
    • baseline mag = 0.76x
    • FOV = 74deg
    • WD = 7mm
  14. base line mag 0.76x, WD = 7mm and FOV = 74deg is for which lens?
    the standard 90D lens
  15. Superfield lens has:
    • 95deg
    • 0.76x
    • 7mm
  16. Digital wide field lens has:
    • 103deg
    • 0.72x
    • 4-5mm
  17. If initial view is not on the ONH,
    follow vessel back to ON
  18. Assessing the ON
    • distinct margins?
    • size of optic disc
    • C/D and symmetry between eyes
    • does NRR follow the ISNT rule?
    • drance haemorrhages?
    • NFL dropout corresponding to notching?
    • bayonetting of vessles?
    • myelination?
  19. indistinct margins indicate
    swelling of ONH due to changes in intracranial pressure
  20. Describing the fundus
    • size by DD
    • location in DD
    • which quadrant and its position (e.g. equator)
    • shape
    • layer (e.g. RPE, choroidal)
    • elevation judged by depth and vasculature behaviour