What are the different types of contact lens designs?
Many lens designs are available to correct various types of vision problems: Spherical Sphericalcontact lenses are the typical, rounded design of contact lenses, which can correct myopia (nearsightedness) or hyperopia (farsightedness). Toric Lenses for Astigmatism Astigmatism is when the cornea is not perfectly spherical or round. Instead of one radius of curvature, it has two running at 90° to each other. Toric lenses allow greater visual clarity for those with astigmatism by correcting this irregularity. They are available in both soft and RGP form, though soft are by far the most commonly used. Bifocal and Multifocal Lenses Bifocal and multifocal contact lenses contain different zones for near and far vision to correct presbyopia, These are useful for those into their 40s and beginning to struggle with near tasks. They allow the wearer to achieve clear vision at a variety of distances. Orthokeratology Lenses This is more commonly used in the USA than in Britain. Special contact lens
