PHENOMENON in Ophthalmology
1. A&V phenomenon
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2. Bells phenomenon
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| Upward rolling of eyeball on lid closure |
3. Entoptic phenomenon
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Visualisation of one’s own ocular structure |
4. Fish egg phenomenon
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| Silicon oil dispersion in replaced vitreous |
5. Haidinger phenomenon - Seeing radial pattern of macula on entoptic visualisation.
6. Jaw winking phenomenon
7. Loch ness phenomenon
Loop of vessel on gonioscopy of infant
8. Pulfrich’s phenomenon 
Perception defect of movement in two eyes due to differential signal timings in optic neuritis.
9. Pseudo Graefe phenomenon -
Ptosis improves on adduction in 3rd nerve palsy (aberrant regeneration)
10. Riddoch’s phenomenon -
Perception of movement not the spot(cortical lesion)
Riddoch syndrome (also known as the Riddoch phenomenon) is an ocular affectation often caused by lesions in the occipital lobe which limit the sufferer's ability to distinguish objects. Only moving objects in a blind field are visible, static ones being invisible to the patient. The moving objects are not perceived to have color or detail.
The subject may only have awareness of the movement without visual perception of it (gnosanopsia), or the general shape of a moving object may be perceivable as a shadow like outline.
11. Uthoff ’s phenomenon -
Decreased visual acuity on exertion (heat) in optic neuritis (multiple sclerosis)
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