{"id":581,"date":"2024-11-14T18:30:35","date_gmt":"2024-11-14T18:30:35","guid":{"rendered":"https:\/\/visualstressclinic.ca\/?page_id=581"},"modified":"2026-01-21T01:34:13","modified_gmt":"2026-01-21T01:34:13","slug":"migraine","status":"publish","type":"page","link":"https:\/\/opticalm.ca\/fr\/migraine\/","title":{"rendered":"La migraine"},"content":{"rendered":"
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Migraine<\/span><\/h2>\n

Bright lights and certain patterns can induce perceptual illusions\/distortions and visual discomfort in most people\u202fas well as\u202fheadaches in patients with migraines.\u202fVisual stimuli are common triggers for migraine attacks, possibly because of a hyperexcitability of the visual cortex shown in patients with migraines.\u202fIndividually prescribed precision\u202ftinted\u202flenses\u202f(PTLs)\u202fhave been shown to\u202freduce perceptual distortions and visual discomfort and to prevent migraine headaches in some patients.\u202fRecent studies have demonstrated the\u202fnormalization of cortical activation and spatial frequency tuning in migraineurs\u202fwhen using\u202fPTLs, suggesting\u202fa neurological basis for the therapeutic effect of these lenses in reducing visual cortical hyperactivation in migraines. [1<\/a>]<\/span><\/p>\n

The cortex is generally\u202fhyperexcitable\u202fin migraines,\u202fand this\u202fhyperexcitability\u202fhas been found to be the\u202funderlying mechanism of Visual Stress.\u202fVisual Stress\u202fresults from\u202fa hyper\u202fresponse to strong\u202fvisual\u202fsensory stimulation\u202fthat\u202fcauses\u202fa spread of excitation through\u202fthe visual\u202fcortex, leading to\u202fthe inappropriate firing of neurons and\u202fresulting in perceptual illusions and distortions,\u202fthat often promote\u202fa migraine\u202fattack.<\/span><\/p>\n

The efficacy of\u202fprecision\u202fophthalmic tints\u202fin preventing\u202fmigraine headache has been reported in several studies [1<\/a>] [2<\/a>] [3<\/a>] showing the suppressing effect of the\u202fPTLs\u202fon visual cortical activity in migraine with aura\u202fpatients,\u202fsuggesting\u202fa possible new prophylactic therapy\u202ffor migraines. They are safe, free of side effects, and relatively inexpensive. While medications address the pain of migraines, precision\u202ftinted lenses\u202freduce the triggers to the discomfort and distortions.<\/span><\/p>\n<\/div><\/div>\n\n

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[1] Huang, J., Zong, X., Wilkins, AJ. et al. fMRI evidence that precision ophthalmic tints reduce cortical hyperactivation in migraine. Cephalalgia, 2011 31(8) 925-936<\/a><\/span><\/span><\/p>\n

[2] Wilkins AJ, Huang J, Cao ,Y. Prevention of Visual Stress and Migraine With Precision Spectral Filters. Drug Development Research. 2007; 68(7): 469\u2013475.<\/a><\/span><\/span><\/p>\n

[3] Wilkins AJ, Patel R, Adjamian P, Evans BJ. Tinted spectacles and visually sensitive migraine. Cephalalgia. 2002 Nov;22(9):711-9.<\/a><\/span><\/span><\/p>\n<\/div><\/div>\n<\/div>\n\n

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Note:<\/h3>\n<\/div><\/div>\n\n

When visual difficulties are reported, a full optometric evaluation is required to identify, treat or rule out issues of eye health, refraction correction or neuro-optometric problems prior to a Visual Stress assessment. While neuro optometric difficulties and Visual Stress are independent conditions, they often co-occur and can be accommodated with combined treatments.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n

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