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Infantile esotropia is an ocular condition of early onset in which one or either eye turns inward. It is a specific sub-type of esotropia and has been a subject of much debate amongst ophthalmologists with regard to its naming, diagnostic features, and treatment.
Dissociated vertical deviation (DVD) is an eye condition which occurs in association with a squint, typically infantile esotropia. The exact cause is unknown, although it is logical to assume it is from faulty innervation of eye muscles.
Congenital esotropia, or infantile esotropia, is a specific sub-type of primary concomitant esotropia. It is a constant esotropia of large and consistent size with onset between birth and six months of age. [6] It is not associated with hyperopia, so the exertion of accommodative effort will not significantly affect the angle of deviation.
The most renowned case of regained stereopsis is that of neuroscientist Susan R. Barry, who had had alternating infantile esotropia with diplopia, but no amblyopia, underwent three surgical corrections in childhood without achieving binocular vision at the time, and recovered from stereoblindness in adult age after vision therapy with ...
Some consider botulinum injections to be a treatment option for children with small- to moderate-angle infantile esotropia. [7] [8] Studies have provided indications that performing injections into both medial rectus muscles may be more effective than an injection into one medial rectus muscle alone. [2]
There is tentative evidence that children with infantile esotropia achieve better binocular vision post-operatively if the surgical treatment is performed early (see: Infantile esotropia). A recent study reported the reoperation rate in a sample of over 6000 patients being 8.5%. [13]
[53] [54] Most commonly used in adults, the technique is also used for treating children, in particular children affected by infantile esotropia. [55] [56] [57] The toxin is injected in the stronger muscle, causing temporary and partial paralysis. The treatment may need to be repeated three to four months later once the paralysis wears off.
Some overcorrections, such as exotropia (eyes deviated outward) following treatment for infantile esotropia, usually lead to good long-term alignment, and is only an apparent complication. Severe complications, such as globe perforation and retrobulbar hemorrhage are rare.