What are Toric Lenses?
Toric contact lenses correct astigmatism. Unlike spherical lenses, toric lenses have two different powers in the lens. This characteristic means that the toric lens must remain in one position for the best visual acuity. Too much movement of the lens can significantly reduce visibility. Some of them are made heavier at the bottom to prevent them from rotating or moving too much.
Who are Toric Lenses for?
Toric lenses can be worn by anyone with corneal astigmatism, lenticular astigmatism, or combinations of both. People with astigmatism who have tried spherical lenses, but continue to have unsatisfactory vision are candidates for toric lenses. The specific material, style or type of contact lens used depends upon the needs, vision quality, and type of astigmatism. Based upon your individual characteristics, your eye doctor will discuss which options will best serve your needs.
Daily Care and Usage of Toric Lenses
The proper way to care for your lenses depends on which type of toric lens you wear. Daily disposable torics are said to be the most convenient when it comes to caring for your contacts. They do not require any extra care products like solutions and cases. Those who wear extended-wear lenses should properly clean and disinfect their lenses daily and try not to expose themselves to too much smoke, chemicals, etc. Overnight wearers do not necessarily need to clean or disinfect their lenses daily, but nothing is wrong with this practice. Regardless of whether your lenses have been customized for color or multifocal functions, your doctor should have specific care instructions for you to take home. Usually you soak your lenses in a solution made for cleaning and disinfecting, followed by a rinse.
Options for Mild Astigmatism
If you have mild astigmatism, between zero and 1.00D, a toric lens may not even be necessary. If your doctor approves, you may be able to wear a regular spherical RGP or even a spherical soft lens instead. RGPs can cover up the need for a correction of astigmatism and doctors can give you a higher-powered spherical soft lens to mask a small astigmatic correction.
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Source from http://www.eyehealthweb.com/editorial-board/dr-paul-yang/