Accessory Structures Flashcards
Tear Film layers (outer to inner)
Lipid - Aqueous - Mucin
Thickest layer of tear film
Aqueous Layer
Thinnest layer of tear film
Lipid Layer
What direction is the afferent pathway
From Eye to brain
What direction is the efferent pathway
From brain to both eyes
Visual Pigment in Daylight (Photopic) vision
Photopsin
Visual pigment in night (scotopic) vision
Rhodopsin
What is Monochromacy
No colour discrimination, either 1 cone opsin or only rods
What is Protonopia
Missing red cone opsin
What is Deutropia
Missing green opsin
What is Tritanopia
Missing blue opsin
What is Anomalous Trichromacy
One of the cone opsins is faulty but still partially functional
What is Protanomoly
Faulty red opsin
What is Deutranomoly
Faulty green opsin
What is Tritanomoly
Faulty blue opsin
Ocular artery pathway
Internal carotid - Ophthalmic artery - Central renal artery (supplies inner artery) - Terminal Branches
Inferior ocular vein pathway
Inferior vortex - inferior ophthalmic - cavernous sinus - jugular
Superior Ocular vein pathway
Superior vortex - central lacrimal - lacrimal - superior ophthalmic - cavernous sinus - jugular
Pathway of light
Cornea - anterior chamber - pupil ( size controlled by iris) - lens - vitreous chamber - retina (macula, fovea) - optic nerve
Layers of the cornea (outside to inside)
Epithelium - Bowman’s membrane - stroma (thickest layer) - Descemet’s membrane - Endothelium
