- Hering’s Law
- During any conjugate eye movements, equal & simultaneous innervation flows to the yoke muscles. It is true for vergence & version.
- During any conjugate eye movements, equal & simultaneous innervation flows to the yoke muscles. It is true for vergence & version.
- Foster Kennedy syndrome
- Unilateral papilloedema with optic atrophy in the other eye suggestive of frontal lobe tumour or olfactory or sphenoidal meningioma of the opposite side. P.S. : papilloedema never develops in optic nerve which is atrophic.
- Unilateral papilloedema with optic atrophy in the other eye suggestive of frontal lobe tumour or olfactory or sphenoidal meningioma of the opposite side. P.S. : papilloedema never develops in optic nerve which is atrophic.
- Pseudo Foster Kennedy syndrome
- Unilateral papilloedema associated with raised intra cranial pressure due to any cause with pre existing optic atrophy due to any cause on the other side.
- Unilateral papilloedema associated with raised intra cranial pressure due to any cause with pre existing optic atrophy due to any cause on the other side.
- Sherington’s Law of reciprocal innervations
- During any conjugate eye movements, increased innervation to an extra ocular muscle is accompanied by a reciprocal decrease in innervation to its antagonist. It is applicable both to version & vergence. Exception : Duane’s Retraction syndrome : simultaneous contraction of the agonist & antagonist leading to no ocular movement + globe retraction.
- During any conjugate eye movements, increased innervation to an extra ocular muscle is accompanied by a reciprocal decrease in innervation to its antagonist. It is applicable both to version & vergence. Exception : Duane’s Retraction syndrome : simultaneous contraction of the agonist & antagonist leading to no ocular movement + globe retraction.