Glasses with special cylindrical lenses are the most common way for lenticular astigmatism correction. According to the leading statistics that lead to ophthalmology, up to 80% of patients with vision prefer glasses of glasses for vision correction.
Glasses can be positive (more) or negative (less), which are selected according to the type of astigmatism. In the case of aqueous highs, the vessels induce uncomfortable: pain, fatigue. Very common cylindrical lenses for lenticular astigmatism correction are combined with lenses used to correct the nearby time short-sightedness or far-sightedness that can be accompanied by astigmatism.
It isn’t easy to choose something that can only be a highly qualified expert. It is important to remember that the selected vessels can cause excessive damage to the eyes and visual acuity.
As the glasses remain in the simplest visual calibration method, they have many disadvantages. The glasses can be wet and milked at the most inappropriate time without changing the person who carries them. But there is also a medical aspect of this problem. Above all, the vessels restrict the vision of the appearance and, often, distort the size and shape of the object.
In addition to the glasses, contact lenses are also used to modify astigmatism. In the past, those who have astigmatism are not available for soft contact lenses. At that time, the calibration of astigmatism can only be done with a solid contact lens. Today’s astigmatism compensation is based on the use of a special conversation contact lens. These lenses can have a TORIC surface on the front or rear of the lens. The contact lens with a TORIC front surface can compensate for a cornea, and a lenticular diameter of 4.5 D for incision flattening TORIC. The contact lenses with a back surface of the TORIC can modify the astigmatism of the cornea up to 6.0 D.
Contact lens screen some benefits:
- Contact lenses can modify high corneal astigmatism.
- The contact lens creates a minimum change in the field of vision and distortion of the retinal image.
- Contact lens allows optimal conditions for binary vision. In other words, it is a visual acuity with two eyes.
- The contact lens minimizes the typical optical aberration and the effect of the prism in glasses of glasses.
- Otherwise, contact lenses have their disadvantages.
Experts register examples often when the restaurant lens uses various complications in the form of inflammatory processes. If most Toric contact lenses’ thickness is large, the patient is inconvenient and extends the adaptation period. The eyes are very sensitive to these lenses and are faster than compared to standard soft lenses. Also, there was a case of complications, such as increasing the probability of the surface form of the cornea and distortion.
This growth is due to chronic oxygen deficiency of the cornea. Also, at different points, different indexes of the thickness of the O-ring can cause several optical aberrations (distortion).
Pay attention to the fact that many patients use a soft TORIC contact lens that suffers from a corneal shape. The interrupted use of the contact lens eliminates the problem (recovering the shape of the cornea). In some cases, changes may not be remarkable. The next selection of the following TORIC contact lenses or glasses modifications may occur, and more importantly, more important and more important, the estimates of the modifications Extractive excimer laser are more important.