WHAT IS ASTIGMATISM OF THE EYE?
The eye focus problem of astigmatism is due to the shape of your cornea and lens. If the red and green lines above reduce to a point focus clearer and more comfortable vision results. Accordingly refractive surgery,contact lenses and spectacle correction can also correct any eye focus problem you may have.
WHAT CAUSES AN EYE FOCUS PROBLEM ?
Astigmatism can be genetically inherited and develop in one or both eyes. In addition,eye strain and eye rubbing can alter the shape of the eye. Even your tear film can alter the quality of your vision.
WHAT IS AN OPTICAL PRESCRIPTION?
A spectacle prescription contains the terms “Sphere”, “Cyl”, and “Axis”. The positive sphere number (with a plus sign) indicates hyperopia and negative numbers (with a minus sign) indicate myopia. The most common axis location on the cornea or lens is 180 degrees or so . This is referred to as “with the rule ” or if around 90 degrees as “against the rule ” .Also the oblique type occurs outside this range. The irregular type occurs when the meridians are not 90 degrees apart.
HOW COMMON ARE EYE FOCUS PROBLEMS ?
How is vision corrected ?
Apart from contact lenses and glasses to correct vision, special contact lenses to reshape the cornea can be used. Also laser eye surgery techniques such as LASIK, ASLA and SMILE can rectify some optical problems.
Sometimes optical errors can be overcome when the eye’s natural lens is removed and replaced with an artificial lens. However glasses or contact lenses may still be required to fully correct and balance the eyes