When Blurry Vision Is Due to Curves

Posted By on Apr 29, 2020 in Uncategorized | 0 comments

Sometimes when the eyes begin to have blurry vision, it has nothing to do with the lens of the eye. Sometimes it happens due to a condition called astigmatism.

Astigmatism defines as blurred vision caused by the transparent covering on the eye known as the cornea. This cornea becomes formed or grows into an elliptical shape rather than the normal spherical one.

So as light falls on the eye pupil how those light rays become bent misses the sweet spot on the retina where such information becomes processed by the brain.

Signs of astigmatism

Most comprehensive eye exams will catch that astigmatism has occurred. In a practice such as Houston Lasik measurements check how light bends as it enters the pupil and then concentrates on the retina. Measurements within a range indicate the condition.

It has a process as it is with all Lasik like surgeries. Visual acuity, as in the clarity of sight, becomes checked by reading a chart. The instrument known as a keratometer measures the curve of the cornea.

Then a phoropter instrument places a series of lenses for a person to look through and those measurements recorded. Taking all that data together from the numbers and their relationships, a good ophthalmologist can determine if a person has astigmatism.

Myopic astigmatism became a unique challenge to treat. Myopia, better known as nearsightedness paired with astigmatism, presented challenges that became much easier to overcome with the appearance of Visian Collamer lens.

Visian toric collamer lens

Made specifically to correct refractive errors, Visian toric collamer lens has proven to be most effective on myopic astigmatism. Often patients become eligible for Visian toric collamer due to not being a candidate for corneal refractive surgery.

Sohag Faculty of Medicine performed a study of patients between the ages of 21 and 45 years of age who had stable refraction but were not a candidate for corneal refractive surgery. The collamer lens does replace the natural lens, but by doing so, it compensates for astigmatism that the natural lens could not.

What the Visian toric collamer lens does comes as a preservation of the normal physiologic contour of the cornea while allowing optical correction of the refractive errors. Uncorrected visual acuity (UCVA) improved in most patients.

For younger patients, it avoids the loss of accommodation found in other surgeries. Accommodation refers to how the eye can increase its refractive power in the lens to concentrate on objects near.

As people age a small loss of accommodation becomes expected as that is a natural process. Sometimes people younger than 40 lose their accommodation.

To maintain accommodation in younger patients or improve it means it delays eye issues common in seniors. The muscles of the eyes work to change the shape of the lens to sharpen the vision by flexibility. The Visian toric collamer lens has flexibility and acts much more like a natural lens.


Just as myopic astigmatism remains a complex issue in eyesight, so too does the process to correct it. The surgery becomes as individualized as needed to restore sight.

Laser eye surgery takes a highly skilled staff and an ophthalmologist to get optimum results like the ones in Houston. Which procedure to use comes from knowing a product, the surgical techniques, and the patient. 

Visian toric collamer lens has highly predictable results with significantly low complication rates. Patients get better eyesight in most cases. Call today and see if Visian is an option for your eye needs.

Houston Lasik leads in providing premium LASIK technologies to Houston, Sugar Land, and the surrounding region. The center’s award-winning medical director introduced revolutionary technologies such as iLASIK to the region. This technology is used by NASA astronauts, Navy SEALS and Air Force fighter pilots. At Houston Lasik, you can now receive the same treatment. For more information, please call (281) 240-0478