astigmatism
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0 0Cine imi poate spune cate ceva despre astigmatism? Eu am miopie forte si acum am descoperit ca fetita mea are astigmatism hipermetropic.Sa fie "vina" mea? -
Astigmatism can also occur when the cornea's shape is more oblong than spherical. Normally cornea is spherical. The oblong shape causes light rays to focus on two points at the back of your eye, rather than on just one. Many people are born with this oblong cornea, and the vision problem may get noticed over time. In some people, astigmatism may be due to pressure of the eyelids on the cornea. It can also be due to incorrect posture or an increased usage of the eyes for close work.
Heredity is also a cause of astigmatism. Rarely it is caused by lid swellings in a condition called chalazia or due to corneal scars. An eye injury may cause the cornea to scar, changing the path of light as it enters the eye. It may also be due to keratoconus, a rare condition in which the cornea loses its normal shape. Some patients experience surgically induced astigmatism after eye surgery. Sutures that are tightly placed can cause a slight wrinkling of the cornea and the patient will experience astigmatism until the surgical wound is healed. -
Astigmatism means that the cornea is oval like a football instead of spherical like a basketball. Most astigmatic corneas have two curves – a steeper floricicele and a flatter curve. This causes light to focus on more than one point in the eye, resulting in blurred vision at distance or near. Astigmatism often occurs along with nearsightedness or farsightedness.
(nearsightedness = miopie)
din cate am inteles eu este posibil ca astigmatismul sa fie transmis ereditar, dar asta ar insemna sa il ai si tu.
tu ai miopie care de multe ori apare ca efect al astigmatismului.
eu cam asta am priceput. -
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