AssessmentsOptic pathways and visual fields
Optic pathways and visual fields
When light enters the eye, it hits a light sensitive neural layer of tissue near the back of the eye called the retina.
That’s where phototransduction occurs, which is the process by which light waves are converted into electrical signals.
Afterwards, these electrical signals are sent to the brain for visual processing.
The left visual field can be divided into two halves.
When light enters the eye, the temporal field of vision is projected to the opposite side, onto the medial nasal retina, and the nasal field of vision gets projected to the opposite side, onto the lateral temporal retina.
So, the visual information that appears in the right upper quadrant is actually project to the left lower retina.
The rods and cones synapse with bipolar cells which in turn synapse with ganglion cells.
These ganglion cells have long axons that travel through the retina layer to the back of the eye where they come together to form a single optic nerve, or cranial nerve II, that exits the retina from the optic disc.
Now your other eye’s visual field covers what’s in the blindspot, but if you only have one eye, like a pirate, things can get a little weird.
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