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Parinaud's syndrome is a cluster of abnormalities of eye movement and pupil dysfunction, characterized by: Paralysis of upwards gaze: Downward gaze is usually preserved. This vertical palsy is supranuclear , so doll's head maneuver should elevate the eyes, but eventually all upward gaze mechanisms fail.
Frequently, paralysis of upward gaze along with several ocular findings such as convergence retraction nystagmus and eyelid retraction also known as Collier's sign and Light Near Dissociation (pupil accommodates but doesn't react to light) are known collectively as Parinaud's syndrome [1] or Dorsal Mid-brain syndrome, are the only physical ...
A third cause of light-near dissociation is Parinaud syndrome, also called dorsal midbrain syndrome. This uncommon syndrome involves vertical gaze palsy associated with pupils that “accommodate but do not react." [5] The causes of Parinaud syndrome include brain tumors (pinealomas), multiple sclerosis and brainstem infarction.
This can result in vision changes and Parinaud's syndrome. [3] Due to the aggressive nature of the disease, tumor spread at the time of diagnosis is common. [13] Pineoblastomas often invades locally, with spread to the head and spine seen in 25–41% of patients. [3] While CNS spread is relatively common, these tumors rarely cause distant ...
The second found similar results for adults 19 to 30 years of age. [7] In a bibliographic review of 2010, the CITT confirmed their view that office-based accommodative/vergence therapy is the most effective treatment of convergence insufficiency, and that substituting it in entirety or in part with other eye training approaches such as home ...
Hypermetropia: Young hypermetropes use excessive accommodation as a physiological adaptation in the interest of clear vision. Myopia: Young myopes performing excessive near work may also use excessive accommodation in association with excessive convergence. Astigmatism: Astigmatic eye may also be associated with accommodative excess.
diplopia or double vision - more seen in adults (maturity / plasticity of neural pathways) and suppression mechanisms of the brain in sorting out the images from the two eyes. cyclotropia , a cyclotorsional deviation of the eyes (rotation around the visual axis), particularly when the root cause is an oblique muscle paresis causing the hypertropia.
The most common cause of POS is cat-scratch disease, an infectious disease that typically results from a scratch or bite from a cat. However, this syndrome is an unusual feature of cat-scratch disease. In rare cases, other infections may also cause the syndrome. [1] Bartonella henselae [2] Francisella tularensis [3] Herpes simplex virus type 1 [4]