Blurred vision when seeing both far and near can be caused by refractive errors such as hyperopia or astigmatism, age-related presbyopia, or other eye conditions. The pattern of blurred vision at certain distances can provide clues, but the exact cause needs to be confirmed through an eye examination.
Unlike myopia, which generally causes distant objects to appear blurry, certain conditions can make vision unclear at more than one distance. Therefore, blurred vision at both far and near distances does not necessarily mean that your myopia prescription has increased.
Why Can Vision Be Blurry When Seeing Far and Near?
The eyes can see clearly when light from an object is properly focused onto the retina. If there is an abnormality in the eye’s refractive system or a change in the eye’s ability to focus on objects, vision can become blurred.
Several refractive errors can affect both distance and near vision, although the pattern of symptoms may vary from person to person.
Conditions that can cause blurred vision at both far and near distances include:
- Hyperopia or farsightedness.
- Astigmatism.
- Presbyopia or age-related difficulty seeing up close.
- A combination of several refractive errors.
- Certain eye conditions that are not simply related to eyeglass prescription.
Can Myopia Cause Blurred Vision When Seeing Both Far and Near?
Myopia primarily causes distant objects to appear blurry.
In myopia, light is focused in front of the retina, causing distant objects to appear unclear. Nearby objects can usually be seen more clearly, especially in people with lower levels of myopia.
However, a person can have myopia along with another refractive error or eye condition, which may also make near vision uncomfortable. Therefore, if both distance and near vision are affected, you should not immediately assume that myopia is the only cause.
Can Hyperopia Cause Both Distance and Near Vision to Be Blurry?
Yes.
Hyperopia, or farsightedness, can make nearby objects difficult to see clearly. In certain cases, particularly when hyperopia is significant, vision may feel blurred and the eyes may become tired more easily.
Symptoms may include:
- Difficulty seeing nearby text clearly.
- Eyes becoming tired quickly when reading.
- Headaches after performing near-vision activities.
- A feeling that vision is out of focus.
- Vision that may feel less clear at certain distances.
An eye examination is needed to determine whether these symptoms are caused by hyperopia.
Can Astigmatism Cause Blurred Vision at Both Far and Near Distances?
Yes. Astigmatism can cause distant and nearby objects to appear blurred or distorted.
With astigmatism, the shape of the cornea or lens causes light to be focused unevenly on the retina. As a result, a person may experience:
- Blurred distance vision.
- Reduced clarity when viewing nearby objects.
- Objects appearing shadowed or distorted.
- Eye fatigue.
- Headaches.
- Frequent squinting to see more clearly.
Because these symptoms can resemble other refractive errors, a refraction examination is needed to determine the type and degree of correction required.
Can Presbyopia Cause Blurred Vision at Both Far and Near Distances?
It can, especially in people who already have a refractive error.
Presbyopia is a natural age-related change in which the eye’s lens becomes less flexible, reducing the ability to focus on nearby objects. This condition generally begins to become noticeable after around 40–45 years of age.
Symptoms of presbyopia may include:
- Nearby text appearing blurry.
- Needing to hold books or phones farther away to see them more clearly.
- Needing brighter lighting when reading.
- Eyes feeling tired after reading.
- Headaches after performing near-vision activities.
Someone who previously had myopia can also develop presbyopia. The combination of these conditions can result in different vision correction needs for distance and near vision.
What Is the Difference Between Blurred Distance Vision and Blurred Near Vision?
The pattern of blurred vision can provide an initial indication of a possible refractive error. Blurred vision mainly when looking at distant objects is more commonly associated with myopia. Blurred vision mainly when viewing nearby objects can be associated with hyperopia or presbyopia.
Blurred vision at both far and near distances can occur with astigmatism, certain types of hyperopia, a combination of refractive errors, presbyopia in people who also have a refractive error, or other eye conditions. However, this pattern is not a diagnosis. An eye examination is still needed to determine the actual cause.
Why Can Both Distance and Near Vision Be Out of Focus?
Clear vision requires the coordinated function of the cornea, lens, retina, and visual system. Problems with the way light is focused or changes in the eye’s ability to accommodate can affect visual acuity.
Some possible causes include:
1. Refractive Errors
Myopia, hyperopia, and astigmatism can cause unclear vision in different patterns.
2. Presbyopia
The eye’s ability to focus on nearby objects gradually decreases due to natural changes in the lens as a person gets older.
3. An Outdated Eyeglass Prescription
If you wear glasses but your vision remains blurry, one possibility is that the prescription no longer matches your current visual needs. An eye examination can help determine whether your prescription needs to be updated.
4. Other Eye Conditions
Not all blurred vision is caused by a refractive error. Therefore, persistent or changing vision problems should be evaluated comprehensively.
How Can You Determine the Cause of Blurred Vision at Both Far and Near Distances?
The best way is to have an eye examination.
An examination can help determine whether the symptoms are caused by myopia, hyperopia, astigmatism, presbyopia, or another eye condition. Refractive error testing generally includes visual acuity measurement and refraction testing.
During a more comprehensive examination, an ophthalmologist can also evaluate other parts and functions of the eye based on the symptoms and initial examination results.
What Tests Are Used for Blurred Vision at Both Far and Near Distances?
The types of examinations performed may be adjusted according to the patient’s age, symptoms, and eye condition.
Some examinations that may be performed include:
- Visual acuity testing.
- Refraction testing to determine the degree of refractive error.
- Distance and near vision testing.
- Evaluation of the cornea.
- Examination of the front part of the eye.
- Examination of the internal structures of the eye, as needed.
- Additional tests if the doctor identifies a specific indication.
A comprehensive examination is particularly important when the symptoms cannot be explained simply by a change in eyeglass prescription.
Does Blurred Vision at Both Far and Near Distances Require Glasses?
It depends on the cause.
Glasses are one way to correct refractive errors. The type of lens is adjusted according to the patient’s visual needs. For someone who requires vision correction for both distance and near vision, a doctor may consider an appropriate type of correction, including multifocal lenses in certain conditions.
However, eyeglass use should be based on the results of an eye examination rather than simply trying a particular prescription independently.
Can LASIK Treat Blurred Vision at Both Far and Near Distances?
In certain cases, refractive surgery such as LASIK may be considered, but not all causes of blurred vision at both far and near distances can be treated with LASIK.
LASIK is intended to correct certain refractive errors, such as myopia, hyperopia, and astigmatism, in candidates who meet the appropriate criteria.
If the symptoms are related to presbyopia, treatment options need to be tailored to the individual’s eye condition and age. Therefore, a preoperative examination is very important in determining the appropriate treatment option.
When Should Blurred Vision at Both Far and Near Distances Be Examined?
Have your eyes examined if:
- Both distance and near vision feel blurry.
- The symptoms are becoming more frequent or increasingly interfere with daily activities.
- Glasses that previously felt comfortable no longer seem to help.
- You frequently squint to see more clearly.
- Your eyes become tired quickly when reading or working in front of a screen.
- Your vision feels out of focus at more than one distance.
Seek medical attention immediately if blurred vision occurs suddenly, especially if it is accompanied by eye pain, loss of vision, flashes of light, a sudden increase in new floaters, or double vision. These sudden symptoms may indicate a condition that requires prompt evaluation.
FAQ About Blurred Vision When Seeing Far and Near
The causes may include refractive errors such as hyperopia or astigmatism, presbyopia, a combination of several refractive errors, or other eye conditions. An eye examination is needed to determine the exact cause.
Myopia primarily causes blurred distance vision. If near vision is also affected, there may be another refractive error or an eye condition that needs to be evaluated.
Yes. Astigmatism can cause both distant and nearby objects to appear blurred or distorted.
Not necessarily. Presbyopia commonly causes blurred near vision after around 40–45 years of age, but blurred vision at both far and near distances can also have other causes.
It depends on the cause. Refractive errors can be corrected with glasses, contact lenses, or, in suitable candidates, refractive surgery. Other causes require different forms of treatment.
An eye examination is recommended if the symptoms persist, increasingly interfere with daily activities, or do not improve with vision correction. If blurred vision occurs suddenly or is accompanied by pain, loss of vision, flashes of light, or a sudden increase in new floaters, seek medical attention immediately.
Conclusion
Blurred vision when seeing both far and near is not always caused by myopia. It can be associated with hyperopia, astigmatism, presbyopia, a combination of refractive errors, or other eye conditions.
The pattern of blurred vision can provide an initial clue, but it cannot replace an eye examination. Visual acuity and refraction testing can help determine the type of vision correction needed, while a more comprehensive eye examination can be performed when there are other indications.
If both distance and near vision begin to appear blurry or interfere with daily activities, having an eye examination is the appropriate step to determine the underlying cause.
