Techniques for Iris, Lens, and AV Flashcards
What are the types of illumination techniques for the lens
- Direct (Paralellpiped and optic section)
- Specular reflection
- Retro illumination
What determines eye color?
density of stromal melanocytes
what are the layers you see when you look at lens
- Anterior lens capsule
- cortex
- Adult nucleus
- embryonic nucleus
- adult nucleus
- cortex
- posterior capsule
Retro illumination of the lens allows you to see lenticular opacities such as ______ cortical cataracts and and posterior sub capsular cataracts
lenticular
The ____ nucleus is the site of the Y sutures
fetal; erect Y anteriorly, inverted Y posteriorly
The ____ is the site of the first signs of some age related cataracts
cortex
What refers to the empty retrolental space
bergers space
What are we looking for when we look into the lens
Cataracts
1. congenital
2. age related: NC, cortical, PSC
Injuries from trauma
What is Mittendorfs dot a remnant of
hyaloid artery; often seen nasally
Epicapsular stars are small light brown/tan dots that may be single or multiple and are remnants of the ______ vasculosa lentis
tunica
What are the different types of congenital cataracts
- Anterior Axial embryonic
- Anterior and Posterior Polar
- Sutural
- Pulverulent
- Currulean
Anterior Axial embryonic cataracts are found in ___percent of the population and opacities form a _____ shaped cluster. There is no ____ reduction
25; propeller; VA
Anterior and Posterior Polar cataracts can reduce ____ depending on its size.
VA
Sutural cataracts rarely affect vision unless they are very ____ and severe
large
Pulverulent cataracts look like ___ particles accumulated together in nucleus of lens
dust
