What is Astigmatism - Causes, Symptoms, & Treatments
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What is astigmatism?
Astigmatism is one of the common refractive errors associated with vision problems. Astigmatism is a focusing issue that causes blurriness in vision regardless of how far the object is.
What causes astigmatism?
Astigmatism occurs when the front of the eye is shaped more like a football instead of a round sphere. The irregular shape of the eye does not allow incoming light to be focused evenly on the retina. There are some areas of the eye that are steeper and some that are more spherical. The improper refraction of light causes blurriness and distortion (objects may appear stretched) at all distances.
Symptoms
- Difficulty seeing objects at all distances
- Optical distortion (objects may appear stretched)
- Constantly squinting
- Eyestrain
- Headaches
Treatments
Eyeglasses
Eyeglasses are the easiest and safest way to correct astigmatism. A comprehensive eye exam with an Eye Care Professional (Optometrist or Ophthalmologist) will identify the refractive error and prescribe corrective lenses needed to address the problem.
Contact Lenses
Contact lenses are a thin, plastic lens that rests directly on the eye to correct vision deficiencies. They have the added benefits of a wider field of view, moving freely without worrying about damaged glasses, and no obstructions to the face.
Contact lenses that correct astigmatism are called toric lenses. Depending on the severity of the astigmatism correction needed some patients may not be eligible for a contact lens correction.
Toric contact lenses or astigmatism contact lenses are typically more expensive than spherical contact lenses. Most people will opt-in for a spherical correction if the prescribed power for astigmatism is relatively low (based on the optometrists' referral).
Proper care and attention are required to ensure the safety of the eyes. They may not be the best option for everyone and there are certain restrictions that could prevent the use of contact lenses. It’s always best to consult with an Eye Care Professional to outline the best course of action.
Refractive Surgery
Nowadays refractive surgery is a safe and viable method to correct vision problems. Refractive surgeries are potentially a permanent solution to deficiencies in vision by reshaping the cornea.
In most cases, this will eliminate the need for eyeglasses or contact lenses. There are a variety of refractive surgeries available. Booking a consultation with an Eye Care Professional will outline the best option and the next steps to move forward.