Astigmatism is a condition that is caused by an irregular shape of the cornea - the clear part of the eye that covers the iris and the pupil. The cornea is usually smooth, round, and spherical but in an astigmatic eye, the cornea turns into a shape that is not spherical and develops a second curve. One of the primary duties of the cornea is to focus light onto the retina which enables you to see clearly. When the cornea is out of shape and develops two curves, this creates two focal points, therefore, causing blurred vision.
The irregular shape of the eye makes it hard for traditional contact lenses to fit and provide a clear vision and therefore requires specialized contact lenses such as toric lenses or rigid gas permeable lenses (RGPs).
Toric contact lenses are specially designed to correct astigmatism and custom-made to fit the eye of the patient. Rather than a perfectly spherical surface like standard contact lenses, toric lenses have an oblong shape made to accommodate the shape of the astigmatic eye. Toric lenses can be made of either soft or rigid gas permeable (RGP or GP) lens material, however soft toric lenses are more common.
Toric contact lenses are also designed in such a way that the lenses stay in place on the eye to maintain proper vision. Sometimes as the eye moves or blinks the lens can rotate considerably on the eye. If this rotation continues with a soft toric lens, a rigid gas permeable lens might be more effective. Rigid gas permeable lenses have a longer initial adjustment time, but once this has passed they are usually just as comfortable as soft contact lenses and they are often easier to care for.
Toric lenses are available in every wearing schedule from daily disposable to long-term wear. In some cases, you may even find coloured toric contact lenses. Due to the customization required, toric lenses tend to be more expensive and may take more laboratory time to make than traditional lenses.
If you have astigmatism, finding the right fit for your contact lenses is essential. Speak to our Crowfoot, West Springs or Creekside Blink Eyewear eye doctor today for a full assessment to determine which type of toric lenses will work best for you to help you see and feel your best.
Blink Eyewear is the largest provider of vision services and care in Calgary, operating no fewer than 3 accessible locations across the region. All of our stores are inventoried with the most sought-after designer and commercial frames and eyewear for all occasions and purposes.
Home to experienced optometrists and opticians, our stores also offer comprehensive eye exams to individuals of all ages, emergency eye care, and the treatment and management of eye conditions such as glaucoma and macular degeneration.
Blink Eyewear boasts the largest collection of eyewear in Calgary, but our 3 locations are also home to the region’s finest optometrists. Just as you will not find a better store to shop for your eyewear, you will not find a better vision clinic to do your eye exam or treat your eye condition.
Go ahead and Blink; what you see is really what you get. Call one of our store numbers or fill out the form below to book an appointment.