When the front part of the eye is not evenly rounded, a person has astigmatism. Astigmatisms prevent the eye from refracting light correctly, resulting in blurry vision 和 a distorted image.
至少 三分之一的人口 有某种形式的散光吗. An astigmatism will be low to severe, depending on how negatively vision is impacted.
Many people are born with astigmatisms, al虽然 they can worsen over time. A person may also develop an astigmatism due to 受伤 或手术. A person who suspects they have an astigmatism should see an 眼科医生求诊.
The type of contacts a person with astigmatism wears will depend greatly on the severity of the astigmatism itself.
While people with astigmatisms are able to wear specialized contact lenses, they may prefer glasses.
Someone who has a low astigmatism will be able to wear normal contacts lenses, al虽然 they may choose to wear contacts to correct the astigmatism.
什么是散光? 两种主要类型
The curve of the eye’s cornea 和 lens is a clear dome. Light enters 和 refracts off the retina, allowing a person to focus. When the cornea or lens is not spherical 和 smooth, astigmatism occurs.
角膜散光
Corneal astigmatism happens when there is an irregularity in the spherical shape of the cornea. 当角膜奇怪地弯曲时, 进入眼睛的光线折射不正确, 造成视力模糊和图像扭曲.
透镜状散光
Lenticular astigmatism occurs when the eye’s lens, located just behind the cornea, is misshapen.
The Best Type of Contact Lenses for Astigmatism
There are three common contact lens options for those with moderate to severe astigmatisms – they are:
- 刚性透气性透镜(以序列)
- 复曲面的接触
- 混合接触
Eye doctors generally consider toric contact lenses to be the best option for those with astigmatism. 然而, we will cover the pros 和 cons of each type of contact lens below.
The most common type recommended for astigmatism is 复曲面的接触 – they are soft 和 designed to rotate back into place. 虽然不太舒服, rigid gas permeable lenses are another common option suitable for astigmatism. 他们提供最清晰的视野.
最后, a hybrid is exactly what it sounds like – these contact lenses combine toric 和 以序列 lenses, featuring a rigid gas permeable core with soft edges – providing both clarity 和 comfort.
There are multiple factors that will determine which contact lens option is best for a particular individual. The person, as well as their doctor, will want to consider cost, visual sharpness, 和 comfort.
刚性透气性透镜(以序列)
刚性透气性透镜(以序列) were introduced in the 1970s. 这些触点更厚更硬, making them generally less comfortable at first – 虽然 the eye will adjust with time.
While 以序列 lenses have a higher upfront cost, they can last for an entire year. They are more durable than soft contact lenses as well, since they are made of plastic.
One of the large benefits of 以序列 lenses is the clarity 和 sharp vision they provide. Since the material is stiff, the quality of vision isn’t altered by blinking.
复曲面的接触
环面触点是目前最常见的, because they were designed specifically to correct an astigmatism. These contacts are soft 和 made of either hydrogel material or a breathable silicone hydrogel material.
There are many different types of 复曲面的接触, because there are various types of astigmatism with no two astigmatisms being exactly the same. 出于这个原因, it may take trying multiple pairs of different 复曲面的接触 before discovering the most optimal set.
A major part of toric contact design is stability. 复曲面的接触 may have a thicker bottom to ensure that the contact rotates back into alignment, thinner sections to ensure its stability on the eye, 或者两者的结合.
复曲面的接触 are more expensive to create 和 more time-consuming to properly fit. For both of these reasons, they will generally cost more than non-复曲面的接触.
If a person has 复曲面的接触 but their vision is blurry or distorted, they should speak with their eye doctor to ensure they are wearing the best contact lenses for their particular astigmatism.
混合接触
混合接触 utilize the best design features of both rigid gas permeable lenses (以序列) 和 toric contact lenses. 出于这个原因, they are often the best choice for those with cornea astigmatism.
The center core 混合触点 is made of the same rigid plastic as other gas permeable lenses. 边缘, 或裙子, 混合触点, 然而, is made of hydrogel material or a breathable silicone hydrogel material, 比如软环触点.
通过结合两个世界的优点, users get the sharp clarity of rigid gas permeable lenses with the comfort of toric lenses. This combination also provides greater stability than 复曲面的接触.
混合触点是 最昂贵的选择. 然而, a pair can be expected to last about half a year.
Contact Lenses versus Glasses for Astigmatism: Which is Better?
Whether contact lenses or glasses are better for astigmatism will be a matter of personal choice for most people. Luckily, there is a wide range of options either way.
Those who have severe astigmatism will likely need to use 复曲面的接触 or wear glasses to correct their astigmatism.
复曲面的接触 are designed specifically for more severe cases of astigmatism. 然而, if clarity 和 sharpness of vision are paramount concerns, glasses may be preferred.
Overall, neither contacts nor glasses are better. 对于一些, contacts offer benefits that glasses simply cannot, 和 vice versa.
It is recommended that a person speak with their eye doctor about their individual astigmatism 和 what options would be best for them.
Can “Normal” Contact Lenses Be Worn with Astigmatism?
In this context, a normal contact lens is a spherical soft one.
A person with astigmatism who wears a normal contact lens is not putting their eye in danger – it is safe for any healthy eye to wear a spherical soft lens.
散光为0的人.75D以下可以佩戴普通隐形眼镜. 然而, anyone with an astigmatism greater than that will need corrective contact lenses or glasses to fix the visual impairment.
散光时佩戴有色隐形眼镜
Colored contacts for those with an astigmatism will need to be 复曲面的接触.
It’s important to speak with an eye doctor about colored contacts, regardless of whether the desire is to wear them continuously or for an event.
It is highly recommended that all colored contacts are prescribed by an eye doctor. 如果使用得当， 研究表明 that colored contacts prescribed by doctors are safe – al虽然 the same cannot always be said for non-prescription colored contacts.
There are various options available, including 定制的镜头. 有兴趣的人应该咨询他们的医生.
If a person with astigmatism chooses to forgo visual clarity in order to wear “normal” colored contact lenses for an event, it is important to make sure the contacts are FDA approved 和 prescribed by a doctor. Even fantasy contact lenses meant for cosplay can be prescribed by a doctor.
What to Do When Astigmatism Contacts are Uncomfortable
Contacts for an astigmatism, especially 复曲面的接触, are more difficult to properly fit. It takes more expertise from an eye doctor to correctly align the contact, 和 it may take practice for the wearer to become comfortable with placing them as well.
环面触点通常是加权的. When blinking 和 engaging in daily activity, 复曲面的接触 will naturally rotate. The bulkier section of the lens is what ensures that it automatically rotates back into place.
A study conducted in 2013 showed that about 80% of new toric contact lens wearers were able to successfully 和 comfortably wear the lenses after the first attempt.
If someone is struggling with their contact lenses, they should 联系眼科医生 立即. 有各种选择和品牌可供选择. A good eye doctor will ensure a patient’s comfort is properly considered alongside visual acuity.
Can People with Astigmatism Wear Contact Lenses?
The question of whether or not people with astigmatism can wear contact lenses doesn’t come up as often anymore. It is generally well-known that there are options, with the most popular being rigid gas permeable lenses, 复曲面的接触, 混合接触.
While hybrid contacts are 虽然t to be the most comfortable with the sharpest vision, 它们的价格也是最高的.
For those with a severe astigmatism who wish to wear contact lenses, 复曲面的接触 are a must. These soft lenses are designed specifically for people with astigmatisms, with bulkier 和 thinner sections designed to create stable placement that always rotates back into alignment.
最后, rigid gas permeable lenses offer sharp visual acuity but take more time for the eye to adjust to its stiff edges. 一组rgp可以持续整整一年, 虽然, making their higher price tag more economical than they appear.
散光是遗传的，但也可能恶化. Most people have some form of an astigmatism – it’s far too easy for the perfect curve of the cornea’s dome to be interrupted by age, 受伤, 或手术.
对于一些, the astigmatism will be so low that normal contact lenses (or an extra-strength prescription for normal contact lenses) will provide clarity of vision.
然而, 对于大多数散光患者, glasses or contacts designed to correct the astigmatism will improve vision 和 overall quality of life.
If someone is experiencing blurry vision 和 distorted image, 尤其是伴有头痛的时候, an eye doctor should be seen as soon as possible.
Whether a person decides to use glasses or find the contact lenses that are best for them, astigmatisms are incredibly common 和 fairly simple to correct.
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