Makindo Medical Notes"One small step for man, one large step for Makindo" |
|
---|---|
Download all this content in the Apps now Android App and Apple iPhone/Pad App | |
MEDICAL DISCLAIMER: The contents are under continuing development and improvements and despite all efforts may contain errors of omission or fact. This is not to be used for the assessment, diagnosis, or management of patients. It should not be regarded as medical advice by healthcare workers or laypeople. It is for educational purposes only. Please adhere to your local protocols. Use the BNF for drug information. If you are unwell please seek urgent healthcare advice. If you do not accept this then please do not use the website. Makindo Ltd. |
Visual Field Change | Appearance | Associated Causes |
---|---|---|
Bitemporal Hemianopia | Loss of vision in the outer (temporal) half of both visual fields |
- Pituitary adenoma - Craniopharyngioma - Suprasellar aneurysm |
Homonymous Hemianopia | Loss of vision in the same half of the visual field in both eyes |
- Stroke affecting the occipital lobe - Tumour in the optic tract or occipital lobe - Traumatic brain injury |
Quadrantanopia | Loss of vision in one quarter of the visual field |
- Temporal lobe lesions (superior quadrantanopia) - Parietal lobe lesions (inferior quadrantanopia) - Stroke |
Central Scotoma | Loss of vision in the central visual field |
- Optic neuritis (often associated with multiple sclerosis) - Macular degeneration - Toxic or nutritional optic neuropathy (e.g., due to alcohol, tobacco) |
Arcuate Scotoma | Arc-shaped loss of vision, usually following the path of retinal nerve fibers |
- Glaucoma - Optic nerve damage - Retinal disease |
Altitudinal Hemianopia | Loss of vision in the upper or lower half of the visual field |
- Anterior ischaemic optic neuropathy (AION) - Retinal artery occlusion - Optic neuritis |
Tunnel Vision | Constricted visual fields, with loss of peripheral vision |
- Advanced glaucoma - Retinitis pigmentosa - Hysteria or malingering (in some cases, true tunnel vision is rare) |
Monocular Vision Loss | Complete loss of vision in one eye |
- Optic neuritis - Retinal detachment - Central retinal artery occlusion - Severe glaucoma |