Contact Lens Basics

Toric Contact Lenses are to Correct Your Astigmatism!

Toric contact lenses are used to rectify vision of persons suffering from astigmatism and were introduced in 1978. Astigmatism is a refractive eye ailment in which the eye cannot identify the exact extent of refraction along various meridians. Astigmatic patients often complain of headaches, eye fatigue and difficulty in focusing on the finer details.

The invention of the toric contacts made it possible for astigmatic patients to wear disposable lenses in the latter part of the nineties. CIBA Vision introduced the first disposable toric contact lens known as Focus Daily Torics in 2002.

In toric contact lenses, one or both optical surfaces have the effect of cylindrical lens, often combined with that of a spherical lens. A special shape applied to the back of the lens characterizes these lenses enabling them to fit better.
 
These toric lenses are made with curvatures at different angles- one to correct astigmatism and the other to rectify myopia or hyper-metropia. Since these lenses cannot rotate on the eye, they are made in a manner to keep the lens stable offering a clear vision.

The toric contact lenses are similar to normal contacts in terms of their structure. Their varieties include soft torics and rigid gas permeable torics. While the former are more comfortable, the latter are better suited to rectify astigmatic problems. The rigid gas permeable torics are more durable and fight accumulation of harmful materials.

Toric contacts may be disposable or non-disposable. The disposable variety is available as daily, weekly, fortnightly or monthly disposable. The non-disposable variety may be used for about a year.

Colored toric lenses are also meant to enhance the eye color or to make a fashion statement. Multi-focal torics are a part of the array of toric lenses available in the market. They help to rectify Presbyopia, a vision disorder. Toric contacts are quite stable and very comfortable. They do not rotate in the eye while blinking or turning around. They adjust easily to the eye and are easy to maintain.

Fitting these toric contact lenses is an expensive and lengthy procedure involving a thorough testing of the eye condition. Thus, it becomes important to consult a skilled and experienced eye care practitioner. An expert eye doctor can recommend the suitable lens design and also foretell the eye care needs. A veteran at fitting contact lenses is indeed indispensable for an accurately fitted toric contact lens.