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Diplopia, also known as double vision, is the simultaneous perception of two images of a single object. It can be binocular or monocular, voluntary or involuntary, and have various ophthalmologic, neurological, or systemic causes.
Anisometropia is a condition of unequal refractive power in the eyes, which can lead to amblyopia or binocular vision problems. Antimetropia is a rare type of anisometropia where one eye is myopic and the other is hyperopic. Learn about the diagnosis and treatment options for anisometropia and antimetropia.
Brittle asthma is a type of asthma distinguishable from other forms by recurrent, severe attacks. [ 1 ] [ 2 ] [ 3 ] There are two subtypes divided by symptoms: Type 1 and Type 2, [ 4 ] depending on the stability of the patient's maximum speed of expiration, or peak expiratory flow rate (PEFR).
Convergence insufficiency is a binocular vision disorder that affects the ability of the eyes to turn towards each other. It can cause symptoms such as double vision, eye strain, headache, and difficulty reading. Learn about the diagnosis, treatment, and prevalence of convergence insufficiency.
Mast cell activation syndrome (MCAS) is an immunological condition in which mast cells inappropriately and excessively release chemical mediators, resulting in a range of chronic symptoms. Symptoms include flushing, itching, gastrointestinal problems, anaphylaxis, and more.
Ocular myasthenia is a form of myasthenia gravis that affects the eye muscles, causing double vision and eyelid drooping. It is an autoimmune disorder where antibodies block acetylcholine receptors, leading to muscle weakness and fatigue.
Hypertropia is a condition of misalignment of the eyes, whereby the visual axis of one eye is higher than the fellow fixating eye. Learn about its causes, presentation, associated defects and treatment options from this comprehensive article.
Cerebral polyopia is a visual disorder that causes seeing multiple images of a stimulus after fixation. It is often associated with occipital or temporal lobe lesions, epilepsy, or migraines. Learn about its presentation, causes, and theories.