Understanding Astigmatism

01 Aug 2013

Astigmatism is an increasingly common refractive problem that usually begins in childhood and may worsen with age as the eye grows and cornea continues to change shape.

 

Astigmatism relates to the shape of the cornea, which ideally should be spherical n shape, but many people have irregularly shaped cornea, which can cause vision problems.

 

With astigmatism, the cornea is often oval in shape. The focusing ability of the cornea is compromised because of its irregular shape which contributes to multiple focal points rather than just one focal point on the retina at the back of the eye.

What causes astigmatism?

The cornea is ideally spherical or round in shape. There are two meridians in the eye - one vertical line and one horizontal line cutting through the midway point, (think of the eye like the face of the clock and the 12-6 meridian is one meridian and the 9-3 meridian is the other).

 

In cases of astigmatism, one meridian is more curved than the other. If you hear the term ‘principal meridians’ mentioned in your particular case, it refers to the steepest and flattest meridians of your eye.

 

Types of astigmatism

 

There are three types of astigmatism:

 

1. Myopic astigmatism: Short-sightedness affects one or both meridians.
2. Hyperopic astigmatism: Long-sightedness affects one or both meridians.
3. Mixed astigmatism: One meridian is short-sighted while the other is long-sighted.

 

Do I have any other options besides glasses or contact lenses?

If you are craving life without cumbersome glasses and uncomfortable contact lenses, then laser eye surgery is a very real solution that can be used to correct astigmatism, as the procedure allows for the permanent reshaping of the cornea. This means that light entering the eye is focused on the retina at the back of the eye, rather than converging into multiple focal points as is the case with astigmatism.

 

To find out more about your level of astigmatism and whether laser eye surgery is right for you, call Optilase now on +353 1 223 8821 or visit /book-your-free-consultation/

More to Explore

What is the difference between LASIK and PRK laser eye surgery?

20 Nov 2014
Read more

Think You Might have Presbyopia? Call Optilase

13 May 2013
Read more

3 signs now is the right time to check out Laser Eye Surgery

26 Feb 2020
Read more

What happens to our vision as our eyes age?

22 Jul 2020
Read more

Book a Free Consultation Today!

At your consultation we will answer all your questions, discuss finance options, and assess whether you are a suitable candidate for one of our life-changing, treatments. Consultations with our expert Optometrists are free and take approximately 1 hour at one of our nationwide clinics.
World’s Leading Technology
Laser Eye Surgery Lifetime Care Guarantee
Laser Health Insurance Discount
World-Renowned Surgeons
20% Tax Relief
0% Interest Free Finance
99% Of Our Patients Recommend Us

Lets Connect

Privacy CentrePolicy & Procedures
Flexible Payment with
humm
Book a Free Consultation
crossmenuchevron-left