Metamorphopsia
Metamorphopsia (from Greek: μεταμορφοψία, metamorphopsia, 'seeing mutated shapes') is a type of distorted vision in which a grid of straight lines appears wavy and parts of the grid may appear blank. People can first notice they suffer with the condition when looking at mini-blinds in their home. For example, straight lines might be wavy or bendy. Things may appear closer or further than they are.
Initially characterized in the 1800s, metamorphopsia was described as one of the primary and most notable indications of
It is mainly associated with
Pathology
The mechanisms that result in the development of metamorphopsia involve structural changes in the retina of the eye (retinal mechanism) as well as processing changes in the cerebral cortex of the brain (cortical mechanism).[6] The retinal mechanism involves the displacement of retinal layers which results in the mislocation of light on the retina.[6] The cortical mechanism, which was discovered after the retinal mechanism, is affected by perceptual “filling-in” and visual crowding effects.[6] The cortical mechanism was found to work in combination with the retinal mechanism to contribute to metamorphopsia in long-standing maculopathy or after the treatment of macular disorders.[3]
Causes of metamorphopsia
Metamorphopsia can be a symptom of a number of eye disorders involving the retina or macula.[7] Some of these conditions include the following:
- Age-related macular degeneration[7]
- Epiretinal membrane and vitreomacular traction[7]
- Posterior vitreous detachment[7]
- Macular hole[7]
Diagnosis
Tests used for diagnosis of Metamorphopsia mostly make use of
Treatment and Prognosis
Metamorphopsia is a symptom of several common retinal and macular diseases, therefore treating the underlying disorder can improve symptoms. For people who have conditions such as
See also
References
- )
- OCLC 1022795077.)
{{cite book}}
: CS1 maint: location missing publisher (link - ^ S2CID 8376773.
- PMID 9779666.
- ^ ISBN 1-58890-119-X.
- ^ PMID 31240135.
- ^ a b c d e "Retina Summary Benchmarks - 2019". American Academy of Ophthalmology. 2017-11-01. Retrieved 2020-12-07.
- ^ S2CID 46100253.