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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.
Accommodative excess. In ophthalmology, accommodative excess (also known as excessive accommodation or accommodation excess) occurs when an individual uses more than normal accommodation (focusing on close objects) for performing certain near work. Accommodative excess has traditionally been defined as accommodation that is persistently higher ...
Differential diagnosis. 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. In this condition, amplitude of accommodation of a person is lesser compared to physiological limits ...
A spasm of accommodation (also known as a ciliary spasm, an accommodation, or accommodative spasm) is a condition in which the ciliary muscle of the eye remains in a constant state of contraction. Normal accommodation allows the eye to "accommodate" for near-vision. However, in a state of perpetual contraction, the ciliary muscle cannot relax ...
Chronic venous insufficiency (CVI) is a medical condition in which blood pools in the veins, straining the walls of the vein. [ 1 ] The most common cause of CVI is superficial venous reflux which is a treatable condition. [ 2 ] As functional venous valves are required to provide for efficient blood return from the lower extremities, this ...
Specialty. Ophthalmology. Exotropia is a form of strabismus where the eyes are deviated outward. It is the opposite of esotropia and usually involves more severe axis deviation than exophoria. People with exotropia often experience crossed diplopia. Intermittent exotropia is a fairly common condition. "Sensory exotropia" occurs in the presence ...
The Brock string is commonly employed during treatment of convergence insufficiency and other anomalies of binocular vision. It is used to develop skills of convergence as well as to disrupt suppression of one of the eyes. [1] During therapy, the one end of the Brock string is held on the tip of the nose while the other is tied to a fixed point.
A large-scale randomized clinical trial known as the Convergence Insufficiency Treatment Trial (CITT) found that office-based vision therapy combined with at-home therapy was more effective than placebo therapy (in-office placebo treatments) for improving symptoms and clinical signs of convergence insufficiency in children and adults.