CN II (Vision + Visual Fields) Cheat Sheet
by Siffi (Siffi) via cheatography.com/122609/cs/22854/
Visual anatomy
Visual system is located in the suprat ent orial compar tment
Cells in back of eye that process vision are rods (night vision + Movement) + Cones (day + colour vision)
In the Macular, rods are more prominent
Path way:
Rods/Cones
Bipolar Cells
Ganglion cells
Optic Disc
Optic Nerve
Optic Chiasm - nasal fibres cross over here
Optic Tract
Nasal fibres - Lateral Geniculate Body (LGB)
Superior Colliculus
Cons ide rat ions
Impa irm ent One/both eyes, total/ partial visual loss, whole/ partial field loss, precip itating factors? Transi ent /co nstant
Dipl opia Unequal eye placement - Brain receives two displaced images
Gaze Disord ers
Hall uci nat ions Field involved, Formed /Un formed
Central loss Macula - <5° of visual field
Field loss (perip her al) >5° of field
Monocular Visual Loss
Single Eye lesion before optic chiasm
Optic Neuritis
S&S
Usually a sign of MS, but can occur in isolation
Presents at a young age
7-10 days of eye pain when moving the eye
Loss of vision
By Siffi (Siffi) Not published yet. Sponsored by Readable.com
cheatography.com/siffi/ Last updated 7th May, 2021. Measure your website readability!
Page 1 of 3. https://readable.com
by Siffi (Siffi) via cheatography.com/122609/cs/22854/
Visual anatomy
Visual system is located in the suprat ent orial compar tment
Cells in back of eye that process vision are rods (night vision + Movement) + Cones (day + colour vision)
In the Macular, rods are more prominent
Path way:
Rods/Cones
Bipolar Cells
Ganglion cells
Optic Disc
Optic Nerve
Optic Chiasm - nasal fibres cross over here
Optic Tract
Nasal fibres - Lateral Geniculate Body (LGB)
Superior Colliculus
Cons ide rat ions
Impa irm ent One/both eyes, total/ partial visual loss, whole/ partial field loss, precip itating factors? Transi ent /co nstant
Dipl opia Unequal eye placement - Brain receives two displaced images
Gaze Disord ers
Hall uci nat ions Field involved, Formed /Un formed
Central loss Macula - <5° of visual field
Field loss (perip her al) >5° of field
Monocular Visual Loss
Single Eye lesion before optic chiasm
Optic Neuritis
S&S
Usually a sign of MS, but can occur in isolation
Presents at a young age
7-10 days of eye pain when moving the eye
Loss of vision
By Siffi (Siffi) Not published yet. Sponsored by Readable.com
cheatography.com/siffi/ Last updated 7th May, 2021. Measure your website readability!
Page 1 of 3. https://readable.com
