Blue 4 Flashcards
What is the Frisby test
3 clear plastic plates of different thicknesses
Four squares with on hidden circle
What range does TNO test cover
480-60 seconds of arc
What is the effective power of the lens?
18-20D
When can rigid contact lenses cause a halo effect?
Pupil is dilated
Due to rereaction of the peripheral lens or adjacent tear film
In standard loupe where is object
Between first principal foxus and lens
What level of magnification of indirect ophthalmoscopy with 13D lens? 20D lense?
13D - 5x
20D - 3x
When does US pachymetry provide a reading
When probe is perpendicular to posterior corneal surface
EOM developement weeks
Week 5 - SR LPS, LR
Week 6 - SO, MR
Week 7 - IO, IR
Order of drainage through lacrimal system
Pucta
Superior and inferior lacrimal canaliculi
Common canaliculus
Nasolacrimal sac
Nasolacirmal duct
Plica lacrimalis
How many layers of conreal epithelium
4-6
How frequent is corneal epithelial turn over
7-10 days
What is Wieger’s ligament
Attachment of vitreous to the lens
What is cloquet’s canal
Perivascular sheath for the fetal hyaloid artery
What absorbs light energy and ascorbate?
Carotenoids - lutein and zeaxanthing
Which respiratory groups are responsible for inspiration and expiration
Dorsal - inspiration BACK IN
Ventral - expiration - Front push out