Abstract: what is the difference between myopia and astigmatism? Experts say myopia and astigmatism are different in etiology and pathological characteristics. In short, myopia is the focus point of vision is not correct, astigmatism is the beam of vision is not correct. So how to treat ametropia? Now let’s learn about it., Ametropia includes not only myopia, but also hyperopia and astigmatism. Many people know the difference between myopia and hyperopia, but they don’t know the difference between myopia and astigmatism. What’s the difference between myopia and astigmatism? How to treat ametropia? Now let’s learn about it., The difference between myopia and astigmatism. Myopia: it is a symptom that the eyes can’t see far things, but see near things clearly. On the premise of static refraction, distant objects cannot converge in the retina, but form a focus in front of the retina, resulting in visual deformation and blurring of distant objects., Astigmatism: it is an abnormal refractive condition of the eye, which is related to the radian of the cornea. It is usually due to the uneven thickness of the cornea or the uneven curvature of the cornea that the refractive rate of each meridian of the cornea is inconsistent, so that the light passing through the meridian can not focus on the same focus, so it can not accurately focus on the retina to form a clear image and form astigmatism., It can be seen that myopia and astigmatism are different in etiology and pathological characteristics. Myopia is the improper focus of the eye; astigmatism is a point that can be regarded as multiple points. To put it simply, myopia means that the focus point of vision is not correct, and astigmatism means that the beam of vision is not correct., Excimer laser surgery can correct ametropia. Specifically, excimer laser corneal refractive therapy technology, It uses a special and extremely precise micro corneal lamellar cutting system (corneal scalpel for short) make a pedicled corneal flap from the surface tissue of the cornea. After turning the corneal flap, under the control of the computer, accurately vaporize some of the tissue to be removed from the corneal stromal layer under the flap with an excimer laser, then rinse under the flap and reset the corneal flap, so as to change the morphology of the anterior surface of the cornea and adjust the refractive power of the cornea so that the external light can be accurate Accurately converging and imaging at the fundus of the eye to achieve the purpose of correcting myopia.,
ametropia includes not only myopia, but also hyperopia and astigmatism. Many people know the difference between myopia and hyperopia, but they don’t know the difference between myopia and astigmatism. What is the difference between myopia and astigmatism? How to treat ametropia? Let’s learn about it.
the difference between myopia and astigmatism
myopia: it is a symptom that the eyes can’t see far things, but see near things clearly. On the premise of static refraction, distant objects cannot converge in the retina, but form a focus in front of the retina, resulting in visual deformation and blurring of distant objects.
astigmatism: it is an abnormal refractive condition of the eye, which is related to the radian of the cornea. It is usually due to the uneven thickness of the cornea or the uneven curvature of the cornea that the refractive rate of each meridian of the cornea is inconsistent, so that the light passing through the meridian can not focus on the same focus, so it can not accurately focus on the retina to form a clear image and form astigmatism.
it can be seen that myopia and astigmatism are different in etiology and pathological characteristics. Myopia is the improper focus of the eye; astigmatism is a point that can be regarded as multiple points. In short, myopia is the focus point of vision is not correct, astigmatism is the beam of vision is not correct.
excimer laser surgery can correct ametropia
specifically, excimer laser corneal refractive therapy technology, It uses a special and extremely precise micro corneal lamellar cutting system (corneal scalpel for short) make a pedicled corneal flap from the surface tissue of the cornea. After turning the corneal flap, under the control of the computer, accurately vaporize some of the tissue to be removed from the corneal stromal layer under the flap with an excimer laser, then rinse under the flap and reset the corneal flap, so as to change the morphology of the anterior surface of the cornea and adjust the refractive power of the cornea so that the external light can be accurate Accurately converge and image at the fundus to achieve the purpose of correcting myopia.
excimer laser surgery is characterized by safety and accuracy, breaking molecular bonds, cold laser, no corneal burn, little damage to surrounding tissues and minimal thermal effect; The near ultraviolet short wave of 193nm will not penetrate the cornea; It will not damage the lens or fundus retina; Eye tracking system; It can perform ultra-fine processing (only 0.25um corneal tissue is cut in one pulse). It can correct myopia within 1400 degrees and astigmatism below 600 degrees.