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Hypertropia is a condition of misalignment of the eyes ( strabismus ), whereby the visual axis of one eye is higher than the fellow fixating eye. Hypotropia is the similar condition, focus being on the eye with the visual axis lower than the fellow fixating eye. Dissociated vertical deviation is a special type of hypertropia leading to slow ...
The pathophysiology of autism is the study of the physiological processes that cause or are otherwise associated with autism spectrum disorders . Autism's symptoms result from maturation-related changes in various systems of the brain. [1] How autism occurs is not yet well understood. Its mechanism can be divided into two areas: the ...
There are many conditions comorbid to autism spectrum disorders such as attention-deficit hyperactivity disorder and epilepsy . In medicine and in psychiatry, comorbidity is the presence of one or more additional conditions co-occurring with the primary one, or the effect of such additional disorders.
The autism spectrum may comprise a small set of disorders that converge on a few common molecular pathways, or it may be a large set of disorders with diverse mechanisms. [13] Autism appears to result from developmental factors that affect many or all functional brain systems. [14] Some factors may disturb the timing of brain development rather ...
The Treatment and Education of Autistic and Related Communication Handicapped Children (TEACCH) philosophy recognizes autism as a lifelong condition and does not aim to cure but to respond to autism as a culture. [2] Core tenets of the TEACCH philosophy include an understanding of the effects of autism on individuals; use of assessment to ...
Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]
Identical twin studies put autism's heritability in a range between 36% and 95.7%, with concordance for a broader phenotype usually found at the higher end of the range. Autism concordance in siblings and fraternal twins is anywhere between 0 and 23.5%. This is more likely 2–4% for classic autism and 10–20% for a broader spectrum.
An overwhelming 97% of families said they are not satisfied with the travel options for autistic children, and 93% said they would take more vacations if there were more autism-certified options ...
Far-sightedness primarily affects young children, with rates of 8% at 6 years old and 1% at 15 years old. It then becomes more common again after the age of 40, known as presbyopia, affecting about half of people. The best treatment option to correct hypermetropia due to aphakia is IOL implantation.
Purpose. whether a person has strabismus. In the fields of optometry and ophthalmology, the Hirschberg test, also Hirschberg corneal reflex test, is a screening test that can be used to assess whether a person has strabismus (ocular misalignment). A photographic version of the Hirschberg is used to quantify strabismus. [1]