Does Astigmatism Get Worse Over Time?

You head to the eye doctor for a routine exam, go through the “which is clearer, one or two?” part, and they let you know that your astigmatism has gotten slightly “stronger.”

Maybe your glasses don’t feel quite as sharp anymore. Or lights at night suddenly seem streakier than they used to. Maybe you’ve started squinting at menus and street signs without even realizing it.

For many people, astigmatism changes slowly over time. Some people barely notice changes for years, while others need small prescription updates every couple of eye exams. Usually, these shifts are gradual and completely normal.

What Is Astigmatism?

Astigmatism happens when the front surface of your eye is shaped unevenly.

Instead of being perfectly round like a basketball, the cornea is curved more like a football. Because of that uneven shape, light entering the eye does not focus evenly onto the retina, which can cause blurry or distorted vision.

Astigmatism can affect both near and distance vision, depending on the prescription. Some people notice blurry vision all the time, while others mostly struggle at night or during activities like driving.

It can also cause symptoms like headaches, eye strain, squinting, fatigue after screen use, and difficulty getting vision to feel perfectly sharp even with glasses.

One thing that surprises a lot of people is just how common astigmatism actually is. Most people have at least a small amount of it.

Does Astigmatism Usually Get Worse?

Sometimes, yes, but usually gradually.

Astigmatism is not necessarily something that rapidly worsens year after year. For many people, prescriptions stay fairly stable for long stretches of time. Others experience slow shifts as the shape of the eye naturally changes with age.

Small prescription changes are extremely common.

For example, if your astigmatism measurement changes slightly between eye exams, that is often just part of normal vision changes over time. Most people will not keep the exact same prescription forever.

The pace of change matters too. A slow, gradual shift is very different from vision suddenly becoming dramatically blurrier over a short period of time.

Why Does Astigmatism Change?

There are several reasons astigmatism can change over time.

One of the biggest is simply aging. Eyes naturally change throughout life, just like the rest of the body does. The cornea can slowly shift shape over the years, which may slightly change your prescription.

Hormonal changes can sometimes affect vision, too. Some people notice temporary prescription fluctuations during pregnancy or other hormonal shifts.

Eye rubbing may also contribute. People with allergies especially tend to rub their eyes frequently, and over time, aggressive rubbing can place stress on the cornea. That is one reason eye doctors often encourage patients to avoid excessive eye rubbing, especially if they have changing vision or underlying corneal issues.

Sometimes worsening “astigmatism” can also be linked to conditions like keratoconus. Keratoconus causes the cornea to thin and bulge outward over time, leading to more noticeable vision distortion. This condition is something eye doctors may monitor for if prescriptions are changing unusually quickly.

At What Age Does Astigmatism Change the Most?

Astigmatism can change at almost any age, but certain periods of life tend to bring more noticeable shifts.

Children and teenagers may experience changes as their eyes continue developing. Young adults sometimes notice small prescription adjustments during their twenties. Later in adulthood, aging changes in the eye can also gradually affect vision.

That said, there is not one universal timeline. Some people keep nearly identical prescriptions for years, while others need updates more often.

Signs Your Astigmatism May Have Changed

Usually, the signs show up slowly rather than all at once.

You may start noticing that road signs look blurrier than they used to or that lights seem to have more glare around them at night. Some people realize they are getting headaches after long periods on the computer or feeling more eye strain while reading.

Others notice that their contact lenses no longer feel as crisp or stable as they once did.

Sometimes people adapt so gradually to worsening blur that they do not fully realize how much their vision has changed until they try an updated prescription and suddenly everything looks sharp again.

Can Astigmatism Cause Night Driving Problems?

Absolutely.

Astigmatism often becomes more noticeable at night because lights can appear streaky, starburst-like, or blurry. Headlights and streetlights may feel harsher or harder to focus on.

This happens because the uneven shape of the eye affects how light enters and focuses, especially in low-light conditions when the pupils naturally dilate.

If night driving suddenly feels harder than it used to, it may be a sign your prescription needs updating.

Does Screen Time Make Astigmatism Worse?

Screen time itself does not directly worsen astigmatism, but it can absolutely make symptoms feel worse.

When people spend long hours staring at screens, they tend to blink less often. That can lead to dryness, eye fatigue, blurry vision, and headaches, all of which can feel more noticeable if you already have astigmatism.

A lot of people assume their astigmatism suddenly worsened when really their eyes are just exhausted and dry from screen strain.

Can Astigmatism Improve?

Sometimes mild astigmatism changes naturally over time, especially in children, but most astigmatism does not completely disappear on its own.

Usually, treatment focuses on correcting the vision rather than changing the shape of the cornea itself.

Glasses, toric contact lenses, and certain refractive surgeries can all help improve how clearly you see.

Do Toric Contact Lenses Help?

Yes. Toric contact lenses are specifically designed for astigmatism.

Unlike standard soft contact lenses, toric lenses are built to stay in a stable orientation on the eye so they can properly correct the uneven curvature causing blur.

When toric lenses fit correctly, they can make a huge difference in visual clarity.

If your astigmatism changes over time, your eye doctor may recommend adjusting your prescription or switching lens brands for better stability and comfort.

Can Astigmatism Become Severe?

It can, although many people have relatively mild to moderate astigmatism.

Higher amounts of astigmatism can make vision significantly blurrier without correction, especially at night. Some people with severe astigmatism notice distortion, ghosting, or difficulty focusing clearly, even with glasses, if the prescription is outdated.

This is why regular eye exams matter so much. Keeping prescriptions updated can dramatically improve everyday comfort and clarity.

When Should You See Your Eye Doctor?

Small prescription changes are normal. Sudden or uncomfortable changes are different.

If your vision suddenly becomes much blurrier, lights appear heavily distorted, or your prescription seems to be changing rapidly, it is important to schedule an eye exam.

The same goes for symptoms like persistent headaches, eye pain, double vision, significant eye strain, or trouble driving safely at night.

Even if your vision feels mostly stable, regular eye exams help monitor both your prescription and your overall eye health.

FAQ

Is it normal for astigmatism to change over time?

Yes. Small changes in astigmatism are very common and often happen gradually throughout life.

Can astigmatism suddenly get worse?

Sudden major changes are less common and should always be evaluated by an eye doctor.

Can you go blind from astigmatism?

Regular astigmatism itself does not cause blindness. It is a very common vision condition that can usually be corrected with glasses or contact lenses.

Why is my astigmatism worse at night?

Astigmatism often feels more noticeable at night because lights become blurrier or more distorted in low-light conditions.

Does astigmatism make screens harder to look at?

It can. Uncorrected astigmatism may contribute to eye strain, headaches, and blurry vision during long periods of screen use.

Do contact lenses work better than glasses for astigmatism?

For some people, yes. Toric contact lenses can sometimes provide sharper or more natural-feeling vision than glasses, depending on the prescription.

Is astigmatism genetic?

It can be. Astigmatism often runs in families.

How often should you get your eyes checked?

Most adults should have an eye exam every one to two years, although your eye doctor may recommend more frequent visits depending on your prescription and eye health.