My eyes all have a cylinder and a minus, the cylinder is 1.5 on the left, if the right one is 0.5 and the minus is 1 all, and now I use a minus lens only, how about there is a soft lens for minus and cylinder?
The eye disorder commonly called cylindrical lay is astigmatism. Astigmatism is a curvature disorder of the cornea or lens of the eye that causes light entering at a certain point not to be completely refracted to the retina (like a screen behind the eyeball to capture light which is then transmitted to the nerves of the eye). The causes of astigmatism are heredity, scars on the cornea, abnormalities in the lens of the eye and so on. Astigmatism usually gives complaints:
Visual distortion, straight lines appear oblique Faint vision Often feels sore / tired eyes Difficult to distinguish similar colors Double vision Astigmatism can be followed by other conditions such as myopia (corrected with a negative spherical lens) and Hyperopia (corrected with a positive spherical lens). The lenses that are usually sold have standard lens curvature so they cannot correct vision in astigmatism. However, now there are several contact lens options that can be used by people with astigmatism, including:
Toric lens. It is a variant of the contact lens that has a different strength (bias) in the cross section, so that the curvature of the contact lens is different. Selection of softlens is adjusted to the meridian area of the eye. This lens is designed not to rotate heavily. Rigid gas permeable (RGP) contact lenses or commonly called hard lenses. The curvature of the contact lenses is fixed / rigid, so that the shape does not follow the curvature of the cornea that is problematic in astigmatism. This type of lens can produce a more focused vision than a toric lens, but due to its stiffer material, the use of this lens on the eye is somewhat uncomfortable. Hybrid contact lens. The center is made up of a material such as RGP contact lenses, while the edges are made of a material such as hydrogel or silicone. Can produce a more focused vision and are more comfortable to use than RGP contact lenses. This type of lens is customized for each person (measuring the curvature of the cornea) so that it is more expensive and not all optics can make it. Due to the use of different types of contact lenses in conditions of astigmatism, it is certainly better to consult an ophthalmologist first. Only then determine the type of contact lenses that are best for you.
Hopefully the explanation above helps.
Dr. Saphira Evani