Visual Pathway Flashcards
(14 cards)
What are the 3 layers of the eyeball from superficial to deep?
Sclera
Choroid
Retina
Which area of the eye has the greatest visual acuity?
Fovea
Which muscle is responsible for vergence during the accommodation reflex?
Medial rectus
What are the 2 types of optic radiation fibres?
Which one is superior + inferior?
Which lobe do each enter into?
Meyer’s loop - inferior - temporal lobe
Baum’s loop - superior - parietal lobe
The left part of the visual field will hit which side of the retina?
Right side of retina
The right part of the visual field will hit which side of the retina?
Left side of retina
Which optic radiation fibre carries information from the upper visual field?
Why?
Meyer’s loop
Because the image is flipped upside down
Which optic radiation fibre carries information from the lower visual field?
Baum’s loop
A problem at the occipital pole can cause loss of what?
What condition would this result in?
Central macula vision
Central scotoma
A pituitary gland tumour compressing the optic chiasm would cause which visual defect?
Bitemporal hemianopia
A lesion of an optic nerve would cause which visual defect?
Unilateral blindness
A lesion of the optic tract on one side would cause which visual defect?
Homonymous hemianopia
A lesion of Meyer’s loop on one side would cause which visual defect?
Upper quadrantanopia
An aneurysm in both internal carotid arteries (extremely rare) would cause which visual defect?
Binasal hemianopia
