1. Partial nature of astigmatism: before in crystal shift, such as congenital skewed, crystal subluxation, etc.; In recent years, fake ray ban due to the increasing of the refractile corneal surgery

, clinical also visible for PRK, LASIK flare deviation caused by optical center etc.

2, refractive willfulness astigmatism: for each refractive index of the lens change is the result of. Astigmatism degree is compared commonly small, such as senile cataract, crystal shape

Body cortical happen water gap, quilted muddy, replica ray ban cause the refractive index of the lens change, can form astigmatism.

3, curve willfulness astigmatism: for corneal curve for anomalies change. As the largest meridian and QuGuangLi QuGuangLi the smallest meridian perpendicular

, the cause rules astigmatism, more for congenital, and astigmatism large degree. As for corneal surface deformation, irregular bending and uneven, in the retina can't form

Into focus, it is known as irregular astigmatism, such as traumatic corneal scar, tapered cornea, corneal degeneration etc.

The causes of the formation of astigmatism:

1. Partial nature of astigmatism: before in crystal shift, such as congenital skewed, crystal subluxation, etc.; In recent years, due to the increasing of the refractile corneal surgery

, clinical also visible for PRK, LASIK flare deviation caused by optical center etc.

2, refractive willfulness astigmatism: for each refractive index of the lens change is the result of. Astigmatism degree is compared commonly small, such as senile cataract, crystal shape

Body cortical happen water gap, quilted muddy, cause the refractive index of the lens change, can form astigmatism.

, the cause rules astigmatism, more for congenital, and astigmatism large degree. As for corneal surface deformation, irregular bending and uneven, in the retina can't form

Into focus, it is known as irregular astigmatism, such as traumatic corneal scar, tapered cornea, corneal degeneration etc.