Temporal hemiretina
Retina · Nasal field of same eye
Ganglion cells of the temporal half of each retina, which receive light from the nasal half of that eye's visual field (the lens inverts and reverses the image). Their axons do not cross at the chiasm and run into the ipsilateral optic tract.
Detail
- Field served
- Nasal hemifield of the same eye
- At the chiasm
- Uncrossed (about 47% of fibres)
- Destination
- Ipsilateral optic tract, LGN layers 2, 3 and 5
- Circuit
- Photoreceptor to bipolar cell to ganglion cell; rods dominate the periphery, cones the centre
When it goes wrong
Rod degeneration (retinitis pigmentosa)
Night blindness followed by progressive concentric constriction of the peripheral field in both eyes, with central acuity preserved until late
Practise this structure
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