Retina Vitreous1 Flashcards
what are the retinal layers
choroid retinal pigment epithelium rods/cones outer limiting membrane bipolar/amacracine and horizontal cells ganglion cells nerve fibre layer inner limiting membrane
what’s the foveal pit
sloping of layers of henle
whats the ora serrata
junction between rtina and cillary body
transition from simple non-photosensitive region of the retina to complex photo sensitive part
seen as indentations on rtina
whats the viteous humour
100% composed of water
consisting of collagen fibres and hyaluronic acid
volume decreases with age
could get vitreous detachments with age
whats the goldmann mirror lens used for
10x mag periphery central and also used as a gonioscopy- 60degreees lens needs a gel and also anaesthetic
how do we image rtina and choroid
fundus photogrphy oct flourecine angiography icg angiography scanning laser autoflouresence
how do we functionally asses the retina
Vision measurement LogMAR V snellen Colour vision testing Contrast sensitivity Electrodiagnosis Perimetry Microperimetry Macular pigment
whats fl angiogrphy
intravenous injection
10mls of 5% fl
dynamc test of integrity of retinal vasculature and choroidal circulation
indocyanine green angiogrpahy
more protein bound
for choirdal maging
not used as much
for inflammations, cetral serous retinopathy and choroidal tumours
oct
measures reflected light from fundus
time domain- old
spectral domain
v useful
autofluoresence
blue spectrum
measures lipofuscin- macular pigment- dry and
can also be sued for retinal dystrophies
electrodiagnosis to measure retinal function
erg- pattern/ mulifocal
vep
dark adaptation
assessment of macular pigment
measures macular pigment density
mpod/macuscope
used to promote nutritional supplements
