Astigmatism refers to the change in the eyeball shape. Our eye shape is like a round eye ball, when it starts to take the football, the sclera is not able to focus the light for which we have face many issues in which we have the 2 main diseases in which include myopia or hyperopia.
Flat Corneal Meridian:
To treat myopia disorder, the ophthalmic professional works on the flat corneal meridian. The flat corneal meridian is replaced by the contact lens that MANEUVERS the shape of the cornea in its original form. The lens that is prepared for the implementation of them on the flat corneal meridian provokes a positive response on astigmatism prevention. To cure the flat corneal meridian, the treatment from the contact lens is of 14 days, the positive results are started to the shoe at first four days. The contact lens causes a temporary change in the steep corneal meridian and a slight change in the flat corneal meridian to the central cornea.
Steep Corneal Meridian:
The steep corneal meridian incision is done before the operation on the meridian of KERATOMETRIC astigmatism. It escalates the significant value of the torsional effect. It aids to reduce the astigmatism dormancy along the meridian. The cataract surgery has been done with the steep corneal meridian incision. Within 3 months, the corneal topography is measured with a rotating SCHEIMPFLUG camera. The steep corneal meridian incision proffer the services by the torsional effect, and corneal astigmatism.
Incision Flattening TORIC:
Implementation of the incision flattening TORIC lenses is the appropriate way to correct astigmatism during cataract surgery. In an investigation that out of 101 patients that have astigmatism disorder during cataract surgery, after 3 months, the eye remains to preserve from other ocular diseases except for those who have intra-operative or post-operative disorders. The incision flattening TORIC is specified to treat total astigmatism, corneal astigmatism, corrected, and in-corrected distant visual acuity, and other rotational disorders of TORIC lenses. The incision flattening TORIC lenses are manoeuver by the retro illumination image of the anterior segment optical coherence tomography (OCT). The rotational error of the incision flattening TORIC lenses is measured by the difference between the intended axis and implanted TORIClenses axis.
Vector Planning For Hyperopic Astigmatism:
The vector planning for hyperopic astigmatism by the refractive index and cylindrical number must neutralize the effect of astigmatism. By vector planning for hyperopic astigmatism, the corneal astigmatism is aligned at 90 degrees with the axis of ORA to develop a clear vision. The mono-vision is aimed by setting the refraction of spherical equivalence at zero, it get minimize corneal astigmatism, and focuses on the single cylindrical refraction.