Is there a difference between toric lenses and lenses for astigmatism?
No, the toric shape purely describes the shape of the lens that is suitable to correct astigmatism.
Astigmatism is one of the most common refractive errors. Similar to other body parts like ears, legs or feet, the clear surface which is called cornea of the eyeball is not 100% symmetrical but slightly shaped similar to a rugby ball (toric in shape) or in some cases has an irregular shape in general from birth or after an injury. Simply put, the need for correction is for some areas of the eye stronger than for the rest of the eye.
According to several studies conducted on several continents, astigmatism exists in most parts of the populations and is not limited to a particular continent. Therefore, it is safe to assume that astigmatism is as common in the GCC / Middle East as in any other country in the world.
What is Cylinder and Axis in toric contact lenses for astigmatism?
A contact lens prescription for the correction of nearsigthed astigmatism, for example, could be: -2.50 -1.00 x 90.