Astigmatism is a visual disturbance caused by a defect in the curvature of the lens or cornea.
This condition can cause vision to become distorted or blurry.
Astigmatism is generally present at birth, but can also be caused by an injury to the eye later in life or as a complication of eye surgery. Astigmatism With Nearsightedness.
Visual acuity at various distances will decrease.
This can be experienced by people with nearsightedness or also called myopia and farsightedness or hypermetropia.
If you don’t get the right treatment, astigmatism can cause headaches and eye fatigue, especially if you use your eyes for a long time. Astigmatism With Nearsightedness.
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Astigmatism Risk Factors
There are several factors that can increase the risk of developing astigmatism:
- Complications due to eye surgery.
- Injury to the cornea due to infection.
- Conditions on the eyelids that disrupt the structure of the cornea. Like a lump on the eyelid pressing against the cornea.
- Keratoconus and keratoglobus, which are conditions when the cornea can change shape, either bulging or thinning.
- Other eye conditions that affect the cornea or lens.
- Myopic diseases, such as hyperopia and hyperopia or nearsightedness (myopia) can accompany astigmatism. Astigmatism With Nearsightedness.
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Astigmatism is caused by a lens or cornea that is not smooth, causing light that enters the eye to be out of focus when passed to the retina.
Therefore, the vision produced by the eye becomes blurry.
Based on the cause, astigmatism is divided into two types:
- Astigmatism caused by defects in the cornea of the eye is called corneal astigmatism.
- Astigmatism caused by a defect in the lens of the eye is called lenticular astigmatism. Astigmatism With Nearsightedness.
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Meanwhile, based on the type of damage, astigmatism is also divided into two, namely:
- Regular astigmatism is when one side of the cornea is more curved than the other. This condition is a common condition and can be treated with the help of glasses or eye lenses.
- Irregular astigmatism is when the cornea of the eye is uneven not only on one side, but across the entire surface of the cornea. This condition occurs due to an injury that leaves a scar on the cornea. This condition can be treated with the help of eye lenses and not with glasses.
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Astigmatism can interfere with the sufferer’s daily activities. Some of the symptoms of astigmatism, namely:
- Vague or unfocused vision.
- Sensitivity to light (photophobia).
- Difficulty distinguishing colors that are located next to each other.
- Difficulty seeing the full image, for example straight lines that appear slanted.
- In severe astigmatism, sufferers may experience double vision. Astigmatism With Nearsightedness.
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To find out if the patient has astigmatism, the doctor will need to perform the following eye tests:
The vision test is the most common type of examination performed.
This check is done by instructing a person to read several letters and various sizes from a distance of 20 feet. Astigmatism With Nearsightedness.
Refraction test or phoropter is a test through the use of an optical refractor machine which has several corrective glass lenses with different strengths.
Later the doctor will ask the person with astigmatism to read the graph while looking through a lens with different strengths on an optical refractor.
They will eventually find the lens that corrects your vision appropriately. Astigmatism With Nearsightedness.
Keratometer or keratometry is an examination that aims to measure the curve or curvature of the cornea of the eye.
In addition, the ophthalmologist may also use corneal topography.
The goal is to find out more information about the shape of the surface of the cornea. Astigmatism With Nearsightedness.
This test aims to diagnose the presence of potential keratoconus.
Later, the results of this test the doctor will determine what type of surgery will be performed if it is necessary. Astigmatism With Nearsightedness.
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In mild cases, astigmatism may not require treatment.
However, in severe astigmatism, the doctor will recommend several treatment methods, namely:
- Use of Corrective Lenses. Corrective glasses and contact lenses prescribed by a doctor are the most common and least invasive treatment for astigmatism.
- Orthokeratology (Ortho-K). Orthokeratology (Ortho-K) is an astigmatism treatment that uses rigid contact lenses to temporarily correct the irregular curvature of the cornea.
- Operating Procedure. In severe cases of astigmatism, your doctor may also recommend refractive surgery. This type of surgery involves using a laser or a small knife to reshape the astigmatist’s cornea and repair it permanently.
There are three common operations for astigmatism.
Examples include laser in situ keratomileusis (LASIK), photorefractive keratectomy (PRK), and radial keratotomy (RK).
Keep in mind that any type of surgery carries a risk of side effects and complications.
Therefore, it is best to consult an ophthalmologist before undergoing a surgical procedure for astigmatism. Astigmatism With Nearsightedness.
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Astigmatism visual impairment is actually not preventable.
However, regular eye exams are important for vision and eye health.
Because, astigmatism can increase slowly, so early detection of this condition is very important.
Interestingly, regular eye exams are also useful for detecting various other vision problems. Astigmatism With Nearsightedness.
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