1 types of amblyopia caused by different etiology1.1 strabismus amblyopiaPatients with strabismus or had had strabismus, accompanied by ambl
1 types of amblyopia caused by different etiology
1.1 strabismus amblyopia
Patients with strabismus or had had strabismus, accompanied by amblyopia, but no fundus abnormalities. Now that this is because the strabismus caused by diplopia and visual disturbance make patients feel extreme discomfort, visual cortex active suppression by tropia macular visual afferent impulse, the macular function has long been suppressed, the formation of amblyopia. This amblyopia is the result of strabismus, is secondary, functional, and therefore reversible, the prognosis is good. But I have a few primary even
Visual function was not significantly improved under active treatment.
1.2 anisometropic amblyopia
Because the object definition formed eyes macular ranging even ametropia corrected anisometropia, caused by the image size is varied, resulting in the eyes images cannot be fused into a visual cortex, can only inhibit the ametropia eyes on large images, and long hair of this type of amblyopia, amblyopia is functional, so reversible.
1.3 form deprivation amblyopia
In the infant period, due to congenital cataract, corneal opacity, ptosis or occlusion of pupil, resulting in light stimulation can not be fully into the eye, deprived of macular light stimulation received normal opportunities, resulting in functional disorders of amblyopia.
1.4 congenital amblyopia
The pathogenesis is not very clear yet. Von Noorden speculated that newborns often had retinal or optic bleeding, which may affect the normal development of visual function. Some congenital amblyopia secondary to nystagmus.
1.5 ametropic amblyopia
Many bilateral, occurring in the absence of wearing glasses with high refractive errors correction. Binocular vision equal or similar. Ametropic amblyopia in hyperopic ametropia. This is not because of amblyopia binocular vision, binocular image fusion without obstacles, therefore does not cause macular function inhibition.
From the surface, the above 5 are amblyopia, but there are essential differences in the pathogenesis. In the light stimulation of strabismus and anisometropic amblyopia in the eyes are the same, the eyes of macular visual function are involved in the occurrence and development process, so the prognosis is good. However, form deprivation amblyopia is a developmental process in which the visual function of infants and young children has not yet been fully developed or mature, and the retina has not been able to get enough light to participate in the development of visual function,
Amblyopia, amblyopia is not only poor eyesight, and poor prognosis. Monocular disorders cause more serious consequences than eyes. So as a result of eye disease and cover the eyes of infants and young children should be particularly careful to avoid the formation of deprivation amblyopia (especially in June).
To sum up, and congenital form deprivation amblyopia prognosis is poor; ametropia and strabismus, anisometropia better prognosis. The key lies in the early detection, timely and correct treatment, the vast majority of vision can be improved, the possibility of obtaining normal vision is quite large.
2 prevention of amblyopia
Diagnosis and treatment of amblyopia is an important principle of early detection, early treatment". It directly affects the therapeutic effect of amblyopia. After the development of amblyopia, amblyopia is completed. It is very important to find amblyopia early. Can proceed from the following aspects:
(1) preschool physical examination: children in general, especially children in kindergarten, at the age of 3 years after a simple visual recognition, the vast majority will recognize the visual chart. The condition of the kindergarten to the children's eyesight 1 census screening every year, parents can also purchase a standard visual acuity chart, hanging on the wall, in the light of the 5m so that children identify. A check must be separately, not your eyes and see, prevent amblyopia is undetected, repeatedly check several times, if the sight of one eye inspection times were less than 0.8, to bring the child to the hospital for further examination. Generally check the best not later than 4 years old.
(2) early detection of abnormal signs: amblyopia children usually have in addition to other manifestations of low vision outside, such as strabismus, visual torticollis, squinting or close etc.. Once the child has a squint phenomenon, should be as soon as possible to the hospital for eye examination, diagnosis, because about 1/2 of strabismus and amblyopia. The other abnormal phenomenon should also pay attention and attention, to the hospital eye examination is caused by eye disease.
(3) in addition, for infants and young children with visual acuity can not, can be used as cover test general understanding of binocular vision: to cover one eye, let the children of monovision, if very quiet and cover the other eye is crying or scratching covering, it is showed that no cover eye eyesight is very poor, as soon as possible check to the hospital.
In short, the early discovery of amblyopia closely depends mainly on parents, kindergartens, schools, hospitals, the most important thing is my parents and children stay together morning and night.