Anatomy
How many layers are there in the cornea?
Five(5) - Epithelium
Bowman's membrane
Stroma
Descmet's membrane
Endothelium
Fuch's dystrophy is a term related to
Decompensation of endothellial cells.
Retina has _ layers
10
Cycle spoke like appearance is associated with which cataract
Cortical cataract
Flashing light or floaters could be a sign of
Retinal detachment
I am about 10 micron thick and consist of a single layer of hexagonal cells, responsible for the pump and barrier function and maintain adequate hydration. Which layer of cornea am I
Endothelial cells of cornea.
The endothelial cells of the cornea are a single layer of hexagonal shaped cells that are extremely critical for maintaining the proper pump and barrier function of the cornea.
Gradient Refractive Index is a term associated with which organ of the eye
Human crystalline lens has a gradient refractive index from 1.38 to 1.406
The first layer of the inner retina starts with-
The two forms of dry eye are
Aqueous deficient and evaporative
One difference between retrobulbar and peribulbar block is the penetration of needle. How can the two be differentiated in terms of penetration of the needle
In retrobulbar block, the needle penetrates deeper into the muscle cone
Pleomorphism refers to change in cell shape of which cells in the cornea
Endothelium cells
The snell's law helps us to understand the relation between angle of incidence with angle of refraction. What is the significance of Snell's law to human eye
Snell's law helps us to have ray tracing IOL calculation formula and the impact of spherical aberration of the cornea.
The brightest layer of an OCT image of retina is the ______
RPE
Evaporative dry eye is a term associated with which part of the eye
Meibomian Glands
The Lens Factor (LF) and Surgeon Factor (SF) are terms associated with which biometry formulae?
Barrett Universal and Holladay I formulae.
The change in cell shape that refers to pleomorphism can be captured in the specular microscope. Which term in the specular microscope refers to the pleomorphism?
Acommodation is a process that is related to lens changing it shape. How does accommodation takes place according to Helmotz theory
Ciliary muscles contract- zonules loosen- lens becomes more convex
Macula Lutea is the place wherein the pigments of the macula are found. Name the three most important pigments found in the region.
Lutein, Zeaxanthin and meso-zeaxanthin
Diffuse uveitis is a term associated with
Pan uveitis- that is inflammation of the entire uvea.
The term angle kappa means a difference between _____________axis and ____________axis
visual axis and pupillary axis.
Polymegathism is a word related to cell size variation. Which term in the specular microscopy page refers to the status of polymegathism of the endothellial cells
Coefficient of variation (CV) - should be below 40
Canal of Schlemm is a term associated with?
Drainage of aqueous humor through the trabelular meshwork.
Index myopia is a term associated with which cataract
Nuclear cataract
The appearance of ______ helps surgeons understand dry AMD
What is Keratometry Index or K Index?
A factor that accounts for the anterior posterior ratio of the cornea as well as a conversion factor for conversion of radius of curvature into dioptre