14 Main Symptoms of Astigmatism

2. Blurry or Distorted Vision

Objects can look blurry at any distance, whether you are looking at a road sign far away or reading a book up close. The blur may not fully clear up when you move closer or farther from the object. Astigmatism changes the shape of the front surface of your eye.

Instead of being round like a ball, it has an uneven curve, which prevents light from focusing on one clear point at the back of your eye. Your brain then receives an unclear image. You might also see distorted shapes. Straight lines can look wavy or tilted, and letters may appear stretched or uneven, which can make reading slow and tiring.

Blurred or distorted vision can affect both eyes or just one. If only one eye has this problem, you may not notice it right away. Over time, you may realize that your vision feels off, especially in low light or after long periods of focus.

3. Headaches

Headaches often occur with astigmatism. You may notice a dull, steady pain around your forehead, temples, or behind your eyes, especially after reading, driving, or using a computer for a long time. Astigmatism causes light to focus at more than one point inside your eye, which makes your vision blurry.

To see clearly, your eye muscles work harder than normal, and this extra effort can lead to tension and discomfort in your head. You might feel these headaches later in the day, and some people also feel pressure around their eyes at the same time. Headaches linked to astigmatism often improve when your eyes rest, so closing your eyes for a short time may reduce the strain.

If you already wear glasses or contact lenses and still get frequent headaches, you may need to update your prescription. Children with astigmatism can also have headaches. They may not explain the pain clearly, but they might rub their eyes, avoid reading, or lose focus during schoolwork.

4. Excessive Squinting

You may squint often when you try to see clearly. Astigmatism causes blurred or distorted vision, and you may squint to reduce that blur. When you squint, you narrow the opening between your eyelids, which changes how light enters your eye. It can briefly improve focus, especially when you look at signs, screens, or objects far away.

You might notice this habit more in bright light or when you feel tired. Children with astigmatism often squint without knowing it, especially while reading, watching television, or looking at the board in class. Frequent squinting can also lead to eye strain after short periods of focus, mild headaches, and tired or sore eyes.

Over time, repeated squinting may become a sign that your eyes are working harder than they should to keep images clear. If squinting happens often or gets worse, an eye exam can help check whether astigmatism, an outdated prescription, or another vision issue is affecting your focus.

5. Easily Strained or Fatigued Eyes

Your eyes may feel tired more often than they should, even after simple tasks like reading a short article or checking your phone. Astigmatism causes light to focus on more than one point in your eye, so your eyes must work harder to create a clear image. That extra effort can lead to eye strain.

You may feel discomfort after long periods of close work. Common triggers include using a computer, reading small print, driving at night, and focusing on detailed tasks. Your eyes may feel sore, heavy, or warm. You may also blink more often or rub your eyes to try to relieve the discomfort.

Eye fatigue from astigmatism often builds up slowly and may become more noticeable at the end of the day. Children and teens may not say their eyes hurt, but you might notice them avoiding reading or losing focus during schoolwork. Adults may feel the need to take frequent breaks to rest their eyes.

6. Trouble Driving at Night

Driving at night can feel harder than it used to. Streetlights, headlights, and traffic signals may look blurry or stretched because astigmatism causes light to focus on more than one point in your eye. Lights may appear to have halos or glare around them. Oncoming headlights can seem brighter than normal and harder to look at, which makes it difficult to judge distance or see road signs clearly.

Night driving often requires sharp contrast vision. In low light, your pupils get larger, which can make blurred vision worse. You might find yourself squinting or leaning forward to see better. You may also feel eye strain after short drives in the dark. Headaches can develop if you focus too hard for too long.

These symptoms can lower your confidence behind the wheel. If only one eye has stronger astigmatism, the imbalance can make night vision feel uneven. You may not notice the problem much during the day, but low light can make it more obvious.

7. Failing the Benchmark Tests

You may notice problems when you take a vision screening at school, work, or the driver’s license office. These tests often check how clearly you see letters or numbers at a distance. If you have astigmatism, the letters may look blurry, shadowed, or slightly tilted.

You might miss small details on the chart, even if you can see larger letters without trouble. This happens because your eye does not focus light evenly. Instead of one clear image, you see a slightly distorted one.

Common issues during vision tests include:

• Trouble reading letters on the 20/20 line
• Squinting to make letters look sharper
• Seeing double or overlapping images
• Feeling eye strain during or after the test

Astigmatism often occurs along with nearsightedness or farsightedness. Because of this, you may struggle with both close-up and faraway vision tasks during the exam. Children with uncorrected astigmatism may fail school vision checks. This can affect classroom performance, especially when reading from the board. Adults may fail routine screenings needed for driving or certain jobs.

8. Failing the Diagnostic Tests

A routine eye exam can reveal a problem before you notice vision changes. During a standard refraction test, the eye doctor asks you to read letters through different lenses. If your answers stay inconsistent or blurred, this can point to astigmatism.

You might struggle to tell which lens looks clearer. Letters can appear stretched, shadowed, or doubled, which makes it hard to achieve sharp focus even when the lens strength changes. In some cases, you may fail a visual acuity test at school or work. The chart may look fuzzy at all distances, not just far away. This pattern often signals that light does not focus on one clear point inside your eye.

If you cannot respond well during a regular refraction test, the doctor may use a light-based method to measure how your eye bends light. This test does not rely on your answers and helps confirm uneven focus caused by the shape of your cornea.

9. Lazy Eye

Lazy eye, also called amblyopia, can develop when one eye does not send clear images to your brain. Astigmatism in one eye may cause this problem if the blur is much worse on one side. Over time, your brain may start to ignore the blurry eye. You may not notice symptoms at first. Many people with a lazy eye do not feel pain or sudden vision loss. Instead, you might have poor vision in one eye that does not improve fully with regular glasses.

Children face a higher risk because their vision is still developing. If astigmatism affects only one eye, the brain may rely more on the stronger eye. This can lead to reduced vision in the weaker eye that continues into adulthood if not treated early.

Lazy eye can also affect reading and focus. You may feel that one eye works harder, even if you cannot explain the difference. Treatment often includes glasses or contact lenses to correct the astigmatism. In some cases, you may need to cover the stronger eye for part of the day to force the weaker eye to work harder.

10. Pains in Your Face

You may feel aching around your eyes, temples, or upper cheeks when you have astigmatism. This pain often builds after you focus for a long time, such as when reading or using a computer. It can feel dull and steady rather than sharp.

Astigmatism makes light focus on more than one point in your eye. Your eye muscles work harder to try to sharpen the image. Over time, this extra effort can spread tension to the muscles in your forehead and face.

You might notice pressure around your nose or above your eyebrows. Some people mistake this feeling for sinus trouble. The discomfort usually links to long periods of visual tasks rather than cold symptoms. Face pain from astigmatism often comes with other signs, such as blurred vision or frequent headaches. You may also feel tired in your eyes by the end of the day.

11. Light Sensitivity

Light sensitivity, also called photophobia, can happen when your eyes do not focus light correctly. With astigmatism, the curved front surface of your eye bends light unevenly, which causes normal indoor or outdoor lighting to feel too bright. This scattered light can make you squint, turn away, or experience watering and irritation in your eyes.

You may notice discomfort in sunlight, under fluorescent lights, or when looking at car headlights at night. In some cases, your eyes may water or feel irritated. Blurred vision and eye strain often appear with this symptom. When light does not focus on one clear point on the retina, your brain works harder to make sense of what you see.

That extra effort can increase your sensitivity to glare. You might also find it hard to adjust when moving from a dark room into bright light. Night driving can become stressful because headlights and streetlights may appear harsh or scattered.

12. Difficulty Seeing Contrasting Colors

Astigmatism can make certain colors stand out less clearly because it changes how light focuses in your eye. When light does not land on one clear point, colors can look dull or slightly blurred. This often happens when you look at colors that should strongly contrast with each other, such as dark blue text on a light background or red letters on a black sign.

Instead of being round, the front of your eye has a more oval shape with astigmatism. This shape causes light to focus in more than one place, which softens edges and reduces color clarity. You might notice more trouble in low light, as contrast naturally drops at night.

If you already have blurred focus from astigmatism, colors and fine details can blend together more easily. Glasses or contact lenses designed for astigmatism can help refocus light. When light focuses correctly, colors and edges often appear clearer and more defined.

13. Double Vision

Astigmatism can cause double vision when it affects how light enters your eye. Instead of seeing one clear image, you see two images of the same object, either side by side or one above the other. The uneven shape of your cornea bends light in more than one direction, which makes objects look doubled or shadowed.

Double vision linked to astigmatism usually affects one eye. If you cover the other eye and still see two images, the uneven curve of your cornea may be the cause. Common eye causes of double vision in one eye include astigmatism, dry eye, cataracts, and problems with the retina.

You may also notice blurred vision at the same time. Reading, driving, or using a screen can make the problem more obvious. Your eyes may feel tired as they try to adjust. If both eyes are open and you see double that goes away when you close one eye, the cause may involve eye muscle balance instead of astigmatism.

14. Myopia

Myopia, or nearsightedness, often occurs with astigmatism, which causes blurry distance vision. You may notice distant objects like street signs or classroom boards appear out of focus, while close objects remain clear. Squinting might help slightly, but it does not fully sharpen your sight.

Astigmatism changes the shape of your cornea or lens, and myopia affects how light focuses inside your eye. When both conditions occur together, your vision may blur at many distances. You may also find it harder to drive at night. Lights can appear fuzzy or stretched, especially if astigmatism distorts them.

Glasses or contact lenses often correct both problems at the same time. These lenses adjust how light enters your eyes so you can see more clearly. In some cases, surgeons may reshape the front of your eye to improve focus.