REVALIDA Flashcards
The light sensitive tissue where light is converted into electric signals by rods and cones
Retina
Nerve fibers that carry the electric signals from retina to optic chiasm
Optic nerve
A structure where nerve fibers cross over to the opposite side of the brain
Optic chiasm
Nerve tracts that carry visual information from optic chiasm to LGN
Optic tract
Acts as a relay station for visual information, processing, and filtering signals
LGN
Carry visual information from LGN to visual cortex
Optic radiation
Responsible for processing visual information and creating sensation of sight
Visual cortex
Scotoma in which area of depression in which target may seem blurry
Relative scotoma
Scotoma in which it is an area where retinal sensitivity cannot be increased
Absolute scotoma
Scotoma in which patient is not aware but detected in examination. Usually in peripheral area
Negative scotoma
Scotoma which patient is aware. More on central area
Positive scotoma
Border of scotoma is zigzag
Scintillating scotoma
Scotoma is stationary and does not progress
Round scotoma
Scotoma where the point of fixation is affected
Central scotoma
Type of central scotoma where the point of fixation is not affected
Pericentral
Type of central scotoma that can be on nasal, temporal, superior or inferior
Paracentral
Central scotoma closer to the blindspot than the fixation point
Paracoecal
Central scotoma where blindspot is larger than what is expected
Pericoecal
Central scotoma that affects or joins together central scotoma and blindspot
Centrocoecal
Shape of pupil
Round
Location of pupil
Centrally located
Normal pupil size
2-5mm
Normal pupil size in physiologic state
3-4mm
Pupil size considered as dilated
5mm