- published: 18 May 2011
- views: 7153
Mydriasis (/mᵻˈdraɪ.əsɪs/) is the dilation of the pupil, usually defined as when having a non-physiological cause, but sometimes defined as potentially being a physiological pupillary response. Non-physiological causes of mydriasis include disease, trauma, or the use of drugs. Normally, as part of the pupillary light reflex, the pupil dilates in the dark and constricts in the light to respectively improve vividity at night and to protect the retina from sunlight damage during the day. A mydriatic pupil will remain excessively large even in a bright environment. The excitation of the radial fibres of the iris which increases the pupillary aperture is referred to as a mydriasis. More generally, mydriasis also refers to the natural dilation of pupils, for instance in low light conditions or under sympathetic stimulation.
An informal term for mydriasis is blown pupil, and is used by medical providers. It is usually used to refer to a fixed, unilateral mydriasis, which could be a symptom of raised intracranial pressure.
A basic introduction to the physiology of mydriasis.
Mydriasis vs miosis
This video demonstrates repair of traumatic mydriasis with the use of a Siepser's knot.
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Aphakia and traumatic mydriasis after blunt ocular trauma with an indoor hockey stick. Iridoplasty with novel iris instruments (Hattenbach, Geuder) and implantation of an iris-claw IOL.
Mydriasis live performance of The Mannequins from their EP produced by Justin Hill from SikTh. In 2005 Mydriasis signed to Lockjaw Records and recorded their debut album "In Order of Appearance" to be released September 18th 2006 across the UK. Mydriasis are: Laurie Ross : Guitar / Cello / Vocals Mike Evans : Bass / Piano / Vocals Lee Baker : Drums James Cooke : Lead Vocals Ben Bell : Guitar http://www.mydriasis.co.uk
Buy : http://www.beatport.com/track/mydriasis-original-mix/5913205 Artist Info : Stampflok : http://www.beatport.com/artist/stampflok/389340 Dark Celebrate Recordings : http://www.beatport.com/label/dark-celebrate-recordings/40149
2013n - ®Anakronic Electro Orkestra™
Excessive dilation of the pupil
No more retinal contractions
We can notice
Just an empty expression
This bitter sense you feel
These dreams feed my pathology
What’s real ?
Who am I talking with ?
What a strange philosophy
My body’s linked up to a cardiogram
But here my soul is sailing on waves of endless purity
I was strangled and choked beneath a white sheet
Then I was trussed up and I was given violent hits
Confinement taint abuse and damages
Thus thrown into a lake suffocating
They drown myself wrapped and tied
Someone found me but it was too late
He free my cold corpse and met a sad fate
Mydriasis told him it was over
Eyes open wide but the heart so closed
A vacant look adopting a pose
We’re all dying in a unexpected fuckin’ way
This bitter sense you feel…
Mydriasis
This bitter sense you feel
These odd dreams feed pathology
What’s real ?
Who am I talking with ?
What a strange philosophy
I can notice a different world from inside
Death is another way of life
Confinement taint abuse and damages
Thus thrown into a lake suffocating
They drown myself wrapped and tied
Someone found me but it was too late
He free my cold corpse and met a sad fate
Mydriasis told him it was over
Eyes open wide but the heart so closed
A vacant look adopting a pose