Cause
Amblyopia has three main causes:

Strabismic: by strabismus (misaligned eyes)
Refractive: by anisometropia (difference of a certain degree of nearsightedness, farsightedness, or astigmatism), or by significant amount of equal refractive error in both eyes
Deprivational: by deprivation of vision early in life by vision-obstructing disorders such as congenital cataract

Strabismus
Strabismus, sometimes also incorrectly called lazy eye, is a condition in which the eyes are misaligned. Strabismus usually results in normal vision in the preferred sighting (or "fellow") eye (the eye that the person prefers to use), but may cause abnormal vision in the deviating or strabismic eye due to the difference between the images projecting to the brain from the two eyes. Adult-onset strabismus usually causes double vision (diplopia), since the two eyes are not fixed on the same object. Childrens brains are more neuroplastic, so can more easily adapt by suppressing images from one of the eyes, eliminating the double vision. This plastic response of the brain, interrupts the brains normal development, resulting in the amblyopia. Recent evidence points to a cause of infantile strabismus lying with the input to the visual cortex.Those with strabismic amblyopia tend to show ocular motion deficits when reading, even when they use the nonamblyopic eye.
Lipoatrophia semicircularis is a medical condition in humans, commonly known as ribbed thighs. It consists of a semicircular zone of atrophy of the subcutaneous fatty tissue located mostly on the front of the thighs. Skin and underlying muscles remains intact. Semicircular lipoatrophy mainly affects office workers. The ribs in the thighs are typically between 2 and 4 cm high and are typically located at about 72 cm above the ground, which is the standard height of office furniture. Cause
It is not yet clear what exactly causes semicircular lipoatrophy. Some hypotheses are that it is caused by localized pressure or by electromagnetic fields. Diagnosis
Treatment
See also
Lipodystrophy
List of cutaneous conditions

References


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