Search results
Results from the WOW.Com Content Network
The symptoms and signs associated with convergence insufficiency are related to prolonged, visually demanding, near-centered tasks. They may include, but are not limited to, diplopia (double vision), asthenopia (eye strain), transient blurred vision, difficulty sustaining near-visual function, abnormal fatigue, headache, and abnormal postural adaptation, among others.
Convergence insufficiency. Accommodative insufficiency ( AI ) involves the inability of the eye to focus properly on an object. Accommodation is the adjustment of the curvature of the lens to focus on objects near and far.
These symptoms are attributed to conversion disorder when a medical explanation for the conditions cannot be found. [7] Symptoms of conversion disorder usually occur suddenly. Conversion disorder is typically seen in people aged 10 to 35, [8] and affects between 0.011% and 0.5% of the general population. [9]
Accommodative excess may occur secondary to convergence insufficiency also. In convergence insufficiency near point of convergence will recede, and positive fusional vergence (PFV) will reduce. So, the patient uses excessive accommodation to stimulate accommodative convergence to overcome reduced PFV.
Internuclear ophthalmoplegia (INO) is a disorder of conjugate lateral gaze in which the affected eye shows impairment of adduction.When an attempt is made to gaze contralaterally (relative to the affected eye), the affected eye adducts minimally, if at all.
Muscle dysfunction, farsightedness, problems in the brain, trauma, infections [3] Risk factors: Premature birth, cerebral palsy, family history [3] Diagnostic method: Observing light reflected from the pupil [3] Differential diagnosis: Cranial nerve disease, [3] convergence insufficiency: Treatment: Glasses, surgery [3] Frequency ~2% (children) [3]
Since spasm of accommodation is a result of contraction of the ciliary muscle, the goal would be to relax the ciliary muscle. New studies conducted on rats using perilla frutescens aqueous extract have shown to relax the ciliary muscle.
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.