Blue 1 Flashcards
(32 cards)
Which way does the lacrimal orbicularis oculi draw the eyelids and papillae
Medially to such tears into the lacrimal punctum
What blood supply to the peripheral cornea?
Oxygen diffusion from anterior ciliary blood vessels
How long does corneal epithelial turnover take
7 days
What are type A muscle fibres for? Type B/
A - sAccAdic eye movements
B - smooth Bursuit, smaller diameter
Type C align visual axes with fine contractions
What day can lens placode by identified?
27
What is thickness of pre-corneal tear film
3.4um
What is the layers seenin gonioscopy posterior to anteiror
I Cant See This PermaNent Stuff
Iris
Ciliary body
Scleral spur
Trabecular meshwork (pigmented then non-pigmented)
Schwalbe’s line
Schoi line (pigment anterior to schwalbe’s line in pigment disperison
What is the path of the unconventional outflow aqueous
Iris root uveual meshwork
Ciliary muscle
Suprachoroidal space
Sclera
What is the path of the conventional outflow of aqueous
Trabecular meshwork
Schlemm’s canal
Ascher veins - aqueous veins
Episcleral venoous plexus
What is resting potential of dark adapted rod cell
- 40 mV
What does Bloch’s law state
Monotonic increase in perceived contrast with increased duration - intensity of threshold stimulus is inversely proportional to duration
genes for different colour vision defects
OPN1SW - blue (short wavelegth opsin)tritan defect
OPN1MW - green (mid wavelegth opsin) deutran defect
OPN1LW - red (long wavelegnth opsin) protan defect
What part of the vtreous body has highest concenrtation of hyaluronan and colalgen
Cortex
Lower in centre - in centre there is only hyaluronan
In cortex there is chondroitin and heparan
What does cataract cause wrt absorption of light
Accumulation of yellow pigments causes increased absorption of blue light
stain for conreal dystrophy
Macular - mucopoysaccharide - alcacin blue
Granular - hyaline - mason trichrome (red)
Lattice - Amyloid - Congo red
What % of white cells are neurtrophils
25%
NAtural tear volume
7-8uL
What is infliximab
Chimeric monoclonal antibody (not human)
What happens to pH of local anaesthetic with adrenaline?
MAde more acidic
What residue to local anaesthetics have?
Aromatic residue - this is hydrophobic
Amide group is hydrophilic
What is candidate gene analysis
Identify genes specifically expressed or those known to code for important proteins in the tissue in question
Pie in sky/pie on floor
PITS
Parietal lobe lesion - pie on floor
Temporal lobe lesion - pie in sky
What is manifest devision?
Tropia
Deviation is always present
Cover test
What does uncover test reveal
Latent deviation
Phoria
