What are the different types of astigmatism glasses?
Astigmatism is blurring the vision of man due to the eye -shaped abnormality. The eye has an oval -shaped oval, causing light to focus on two points on the retina rather than one. Astigmatism glasses are repaired by irregularly in the shape of a lens to balance the abnormality on the eye. Different vision conditions allow different types of glasses of astigmatism. This includes glasses for astigmatism only or for problems with folded vision, such as astigmatism with nearsightedness, hyperopia or presbyopia. "Sphere" concerns the extent to which myopic or sighted is, while the "cylinder" indicates astigmatism. Patients with abnormal cylinders have an irregularly shaped lens or cornea. "Axis" refers to the location of irregularity that causes astigmatism. Based on these numbers, the optometrist can determine exactly what secondary glasses of the astigmatism that the patient needs. Lenses in astigmatism glasses curve more in one area than in the other, due to the location and degree of irregularity into the eye. This level the eye curve and allows the light to focus on a single point in the retina and restore normal vision.
If the patient suffers from myopia or nearsightedness, toric lenses can be enhanced by concave lenses. This makes it possible to solve both problems through one pair of glasses of astigmatism. Concave lenses adapt to myopia, while toric lenses deal with the issue of astigmatism. Similarly, individuals with hyperopia or foresight and astigmatism can benefit from convex lenses composed of toric.
Astigmatism glasses can also be made for Thos, which suffers from presbyopia or blurred vision in nearby buildings. Bifocal glasses that modify vision for both near and distant objects can be combined with toric lenses. Reading glasses can also be adjusted in the same way.
Although glasses of astigmatism provide clearer vision, they do not cure the person Astigmatismu. They are also less effective in driving serious cases of mixed astigmatism, in which both irregular eyeball curves are not perpendicular to each other. The only known treatment of astigmatism is laser eye surgery, which has less predictable results. The added risk causes most individuals who have astigmatism decide to manage the condition using glasses of astigmatism or contact lenses.