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Astigmatism Tips

Astigmatism - How Orthokeratology Can Be Of Help?

Dr. Rajesh Shah 87% (13 ratings)
M.S
Ophthalmologist, Ahmedabad
Astigmatism - How Orthokeratology Can Be Of Help?

People may have weak eyes due to a variety of reasons. Astigmatism happens to be one of those reasons. When one is affected by astigmatism, it results in blurry vision. The eye has a part called the cornea, which is the outermost layer of the eye and is responsible for allowing light to enter. When the cornea is not shaped as it should be, it leads to astigmatism.

However, this is not the only condition under which it can occur. In fact, there are two different types of astigmatism. One is corneal astigmatism which is the result of an odd-shaped cornea. The other is lenticular astigmatism, which occurs when the lens has an incorrect shape. More often than not, people are born with astigmatism. However, there are chances of developing this eye disorder after an eye injury or after an eye disease.



How to diagnose?
There are a few ways in which astigmatism can be diagnosed.

  • One of the most popular methods is the visual acuity test. This measures the distance at which a letter is read clearly, as compared to what it should be.
  • Another way is by refraction. By placing lenses in front of the eyes, the way they focus light is measured.
  • The third way by which astigmatism can be detected is by keratometry, also known as topography. Light is focused on the cornea and the reflection is measured to find the curvature of that area.

Treatment options
The easiest way to go about treating astigmatism is by using corrective lenses. This is usually the method of treatment for people whose astigmatism is not that bad. The lenses could either be a part of spectacles or used as contact lenses. The good part about contact lenses is that the field of view is wider.

Orthokeratology (Ortho-k) works to improve astigmatism by using lenses as well. However, the lenses are of the hard variety. These lenses are useful for corneal astigmatism patients as they reshape the eye. Usually, they are worn while sleeping and most people can have normal vision the next day. However, if one stops using them, the eye goes back to its original state. So, they are not a permanent solution.

Surgery, however, can be a permanent solution to astigmatism. LASIK and PRK are two of the most popular types. RK is also popular, but to a lesser extent. It is good to remember that the risks of surgery should be discussed with a doctor prior to undergoing one. In case you have a concern or query you can always consult an expert & get answers to your questions!‚Äč

2322 people found this helpful

Intraocular Lenses - New & Improved!

Asg Eye Hospital 87% (15 ratings)
ABC
Ophthalmologist, Jodhpur
Intraocular Lenses - New & Improved!

Intraocular lenses (IOLs) are medicinal gadgets that are embedded inside the eye to supplant the eye's regular lens when it is evacuated during cataract surgery. IOLs additionally are utilized for a sort of vision remedy surgery called refractive lens exchange.

There is quite a large range of IOLs to choose from, in the modern-day market.
The most newly developed IOLs are premium by category. Here is a list of all the new FDA approved IOLs which are extremely effective.

1. Aspheric IOLs
Conventional intraocular lenses have a spherical optical configuration, which means the front surface is consistently bended from the focal point of the lens to its fringe. Despite the fact that a spherical IOL is generally simple to make, this configuration does not copy the state of the regular lens inside the eye, which differs in curvature from focus to fringe. At the end of the day, the eye's common lens is aspheric.
Mainstream aspheric IOLs that are FDA-endorsed and accessible in the U.S. include: Tecnis Aspheric, AcrySof IQ, SofPort AO, and Softec HD.

2. Toric IOLs
Toric IOLs are premium intraocular lenses that correct astigmatism and also partial blindness or farsightedness. Similar to toric delicate contact lenses, toric IOLs can redress astigmatism since they have diverse forces in various meridians of the lens. They additionally have arrangement markings on the fringe part of the lens that empower the specialist to modify the introduction of the IOL inside the eye for ideal astigmatism redress. Before the cataract surgery, the specialist places transitory markings on the patient's cornea that distinguish the area of the most bended meridian of the front of the eye.

3. Accommodating IOLs
Accommodating IOLs are premium intraocular lenses that grow the scope of clear vision with both an aspheric configuration and adaptable "haptics", the supporting legs that hold the IOL set up inside the eye. These adaptable legs permit the obliging IOL to push ahead somewhat when you take a gander at close protests, which builds the centering force of the eye enough to give preferred close vision over an ordinary monofocal lens.

4. Multifocal IOLs
Multifocal IOL is another classification of presbyopia-revising IOL that can diminish your requirement for pursuing glasses or PC glasses after waterfall surgery.
Like multifocal contact lenses, these premium IOLs contain included amplification in various parts of the lens to grow your scope of vision so you can see things unmistakably at all separations without glasses or contact lenses.

These new intraocular lens techniques are more efficient than ever and provide successful results for your vision.

In case you have a concern or query you can always consult an expert & get answers to your questions!

4594 people found this helpful

LASIK - Change The Way You See Things!

Dr. Ruchi 87% (10 ratings)
MBBS, DOMS
Ophthalmologist, Faridabad
LASIK - Change The Way You See Things!

While spectacles are a fashion statement for some people, for others they are an uncomfortable necessity. Though contact lenses may be a little more aesthetically pleasing they too can be quite uncomfortable and cannot be worn throughout the day. Thankfully, there is a third way to correct vision. Laser sugery or LASIK, it is a popular refractive procedure that can correct common vision problems, such as nearsightedness, farsightedness and astigmatism. This procedure aims at reshaping the cornea so that light entering the eyes can be focused onto the retina for the person to have a clearer vision. 

  • Laser surgery is pain-free and quick in most cases. Usually, it does not take more than 15 minutes to correct vision in both eyes. The results of this surgery can be seen in as little as 24 hours. 
  • The first step of laser surgery to correct vision is to create a thin, circular flap in the cornea. This is then folded back to access the stroma or underlying cornea. An excimer laser is then used to remove some of the corneal tissue.
  • For people suffering from nearsightedness, the cornea is flattened while for people suffering from farsightedness, the cornea is made steeper. In cases of astigmatism, an irregular cornea is smoothened.
  • Once the correct gradient has been achieved the corneal flap is put back into place and the cornea is allowed to heal naturally. There are no stitches or bandages required in a laser eye surgery.
  • You may feel a temporary burning or itching sensation in your eyes immediately after the procedure. It is important not to rub your eyes or place any pressure on them. Your vision may also be cloudy or blurred for the first few hours.
  • A doctor will usually advise you to rest for a few days after the surgery so that your cornea can heal properly. In a few days, your eyesight should stabilize, though, in a few rare cases, it may take a little longer. You should also avoid any form of strenuous exercising for a few days after the surgery. 

Though LASIK surgery has a very high success rate, there are very rare occasions where spectacles may still be needed even after the surgery. Thus LASIK is a choice of treatment for many who seek freedom from glasses. In case you have a concern or query you can always consult an expert & get answers to your questions!

3229 people found this helpful

LASIK Eye Surgery - Facts About It!

Dr. Rajeev Gupta 86% (25 ratings)
MBBS, MS - Ophthalmology
Ophthalmologist, Ghaziabad
LASIK Eye Surgery - Facts About It!

While spectacles are a fashion statement for some people, for others they are an uncomfortable necessity. Though contact lenses may be a little more aesthetically pleasing they too can be quite uncomfortable and cannot be worn throughout the day.

Thankfully, there is a third way to correct vision. Laser surgery or LASIK, it is a popular refractive procedure that can correct common vision problems, such as nearsightedness, farsightedness and astigmatism. This procedure aims at reshaping the cornea so that light entering the eyes can be focused onto the retina for the person to have a clearer vision. 

Laser surgery is pain-free and quick in most cases. Usually, it does not take more than 15 minutes to correct vision in both eyes. The results of this surgery can be seen in as little as 24 hours. 

The first step of laser surgery to correct vision is to create a thin, circular flap in the cornea. This is then folded back to access the stroma or underlying cornea. An excimer laser is then used to remove some of the corneal tissue. For people suffering from nearsightedness, the cornea is flattened while for people suffering from farsightedness, the cornea is made steeper.

In cases of astigmatism, an irregular cornea is smoothened. Once the correct gradient has been achieved the corneal flap is put back into place and the cornea is allowed to heal naturally. There are no stitches or bandages required in a laser eye surgery. You may feel a temporary burning or itching sensation in your eyes immediately after the procedure. It is important not to rub your eyes or place any pressure on them.

Your vision may also be cloudy or blurred for the first few hours. A doctor will usually advise you to rest for a few days after the surgery so that your cornea can heal properly. In a few days, your eyesight should stabilize, though, in a few rare cases, it may take a little longer. You should also avoid any form of strenuous exercising for a few days after the surgery. 

Though LASIK surgery has a very high success rate, there are very rare occasions where spectacles may still be needed even after the surgery. Thus LASIK is a choice of treatment for many who seek freedom from glasses.

In case you have a concern or query you can always consult an expert & get answers to your questions!

5512 people found this helpful

Astigmatism - Ways They Can Be Diagnosed!

Dr. Amit Solanki 88% (20 ratings)
FAECS, DNB Ophtalmology, DO Ophthalmology, Fellowship In Phacoemulsification & Refractive Surgery
Ophthalmologist, Indore
Astigmatism - Ways They Can Be Diagnosed!

People may have weak eyes due to a variety of reasons. Astigmatism happens to be one of those reasons. When one is affected by astigmatism, it results in blurry vision. The eye has a part called the cornea, which is the outermost layer of the eye and is responsible for allowing light to enter. When the cornea is not shaped as it should be, it leads to astigmatism.

However, this is not the only condition under which it can occur. In fact, there are two different types of astigmatism. One is corneal astigmatism which is the result of an odd-shaped cornea. The other is lenticular astigmatism, which occurs when the lens has an incorrect shape. More often than not, people are born with astigmatism. However, there are chances of developing this eye disorder after an eye injury or after an eye disease.

How to diagnose?
There are a few ways in which astigmatism can be diagnosed.

  • One of the most popular methods is the visual acuity test. This measures the distance at which a letter is read clearly, as compared to what it should be.
  • Another way is by refraction. By placing lenses in front of the eyes, the way they focus light is measured.
  • The third way by which astigmatism can be detected is by keratometry, also known as topography. Light is focused on the cornea and the reflection is measured to find the curvature of that area.

Treatment options
The easiest way to go about treating astigmatism is by using corrective lenses. This is usually the method of treatment for people whose astigmatism is not that bad. The lenses could either be a part of spectacles or used as contact lenses. The good part about contact lenses is that the field of view is wider.

Orthokeratology (Ortho-k) works to improve astigmatism by using lenses as well. However, the lenses are of the hard variety. These lenses are useful for corneal astigmatism patients as they reshape the eye. Usually, they are worn while sleeping and most people can have normal vision the next day. However, if one stops using them, the eye goes back to its original state. So, they are not a permanent solution.

Surgery, however, can be a permanent solution to astigmatism. LASIK and PRK are two of the most popular types. RK is also popular, but to a lesser extent. It is good to remember that the risks of surgery should be discussed with a doctor prior to undergoing one. In case you have a concern or query you can always consult an expert & get answers to your questions!

2389 people found this helpful

Know Everything About Astigmatism!

Wavikar Eye Institute 89% (213 ratings)
Ophthalmologist
Ophthalmologist, Thane
Know Everything About Astigmatism!

Astigmatism is an eye condition where there is an imperfection in the curvature of the cornea. The cornea and lens are smooth and equally curved in all directions, which helps to focus the light rays to the retina. But if there is an imperfection in the curvature, then you will suffer from a refractive error. Astigmatism is not an eye disease. It is simply a condition where the eye is not able to focus the light. 

Causes
Irregular shape of the cornea is the main cause for astigmatism. It might also be caused because of the imperfect shape of the lens. Suffering from astigmatism is very common. You are either born with the condition or you might have developed it after an eye surgery. It is an incorrect concept that watching too much of television or reading without enough light causes astigmatism.

Types
There are three different types of astigmatism:

  1. Myopic astigmatism: When the principal meridians of the cornea are nearsighted.
  2. Hyperopic astigmatism: When the principal meridians of the cornea are farsighted.
  3. Mixed astigmatism: When one of the principal meridians is nearsighted and the other is farsighted.

It can also be classified in two other types:

  1. Regular astigmatism: When the principal meridians are perpendicular to each other.
  2. Irregular astigmatism: When the principal meridians are not perpendicular to each other.

Symptoms
Blurry or distorted vision, strain in the eye, eye discomfort, squinting and headaches are a few symptoms of astigmatism

Diagnosis:
If you notice the symptoms stated above, make sure you pay a visit to your ophthalmologist. If you are suffering from astigmatism, your doctor will do an eye test to check how much your eye is able to focus on light. After conducting his tests, he will determine how much power you have and you will have to wear glasses of that power. Apart from the option of wearing glasses or artificial lenses, you can also go for a surgery to correct the condition. LASIK is an option among the many other options of surgeries available.

Diet
Eat foods rich in sulphur. Foods like fish, green vegetables, pineapple, garlic, onion, olive oil, etc are rich in sulphur. Hence, eating these will help you battle astigmatism.

In case you have a concern or query you can always consult an expert & get answers to your questions!

5189 people found this helpful

Types and Benefits of Breathing Contact Lenses!

Dr. Varun Gogia 89% (12 ratings)
MBBS, MD - Ophthalmology, Vitreoretina and Uvea
Ophthalmologist, Gurgaon
Types and Benefits of Breathing Contact Lenses!

Variety of contact lenses is used to correct refractive errors. Soft Contact (hydrogel) Lenses are most often used in various types of refractive errors but they have certain disadvantages. These lenses do not permit adequate Oxygen to pass through which is essential for health of cornea and hence they can be worn for limited hours, i.e 6 to 8 hours maximum and never while sleeping. The tear proteins get deposited on these lenses which limit their life to about a year. If worn for prolonged period or proper measures not taken to clean the lenses, cornea can get an ULCER which at times can result in permanent loss of vision. Disposable daily wear lenses provide safer alternative but the cost increases significantly. Since soft contact lenses are applied after cleaning with a solution which can be the cause of mild to severe allergic conjunctivitis which can become intolerable. Soft contact lenses are not ideal in eyes with high corneal astigmatism.

Merits of soft contact lenses are that they can be dispensed over the counter or purchased on line though it is not ideal. A correct curvature and power of a contact lens is determined by a contact lens specialist/ Ophthalmologist after measuring exact corneal curvature and using trial contact lens. Another merit is that these lenses can be accepted very easily since even on the first day they do not produce much of discomfort. These lenses can be worn off and on without any inconvenience. Recent introduction of Toric Contact Lenses have made them more acceptable in cases of moderate corneal astigmatism.

Breathing Contact Lenses:

These lenses are the one which permit significant amount of oxygen to pass through and hence can be worn for prolonged interval without any adverse effect on the cornea. These are of two types

  1. Semisoft or Extended Wear RGP Contact Lenses: These lenses are made up of FP 92 which is a semi rigid soft plastic and is highly permeable to oxygen. These lenses are excellent for high refractive errors, especially in patients who have high corneal astigmatism. Even cases with irregular cornea or Keratoconus, these lenses can be accepted with rewarding results. These lenses can only be fitted by an expert Ophthalmologist since precise measurement has to be carried out and various trial lenses have to be tried to evaluate the optimum fit. The lenses are made to measurement and the patient has to be precisely trained to fit the lenses and maintain them. As stated, the lenses can be safely worn while sleeping and there is practically no danger of corneal toxicity or infection. These lenses may last for 4-5 years. One of the demerits of these lenses is that they take 5-6 days to adopt and the patient is advised to use them regularly. They are excellent alternative to LASIK surgery.
  2. Silicon Hydrogel Contact Lenses: These are recent introduction of extended wear contact lenses with capacity to 'breathe' better than soft or hrdrogel contact lenses. Some of the recent Silicon Hydrogel Contact lenses introduced by Alcon and Bausch and Lomb can be worn for a week or so.

Silicon hydrogel lenses though indicated for prolonged wear but can cause mild keratitis and sometimes allergic keratitis if worn overnight. These lenses still needs lot of improvement to be free of complications

Advise: It is ideal to consult an Ophthalmologist specialized in contact lenses for fitting of a proper contact lenses. Advertised lenses some time misguide and can be damaging to the eye.

3696 people found this helpful

Astigmatism - Causes And Symptoms

Dr. Somdutt Prasad 91% (114 ratings)
FACS, FRCOphth, Fellowship of the Royal College of Surgeons (FRCS), MS - Ophthalmology, MBBS
Ophthalmologist, Kolkata
Astigmatism - Causes And Symptoms

Astigmatism is an eye condition where there is an imperfection in the curvature of the cornea. The cornea and lens are smooth and equally curved in all directions, which helps to focus the light rays to the retina. But if there is an imperfection in the curvature, then you will suffer from a refractive error. Astigmatism is not an eye disease. It is simply a condition where the eye is not able to focus the light. 

Causes
Irregular shape of the cornea is the main cause for astigmatism. It might also be caused because of the imperfect shape of the lens. Suffering from astigmatism is very common. You are either born with the condition or you might have developed it after an eye surgery. It is an incorrect concept that watching too much of television or reading without enough light causes astigmatism.

Types
There are three different types of astigmatism:

  1. Myopic astigmatism: When the principal meridians of the cornea are nearsighted.
  2. Hyperopic astigmatism: When the principal meridians of the cornea are farsighted.
  3. Mixed astigmatism: When one of the principal meridians is nearsighted and the other is farsighted.

It can also be classified in two other types:

  1. Regular astigmatism: When the principal meridians are perpendicular to each other.
  2. Irregular astigmatism: When the principal meridians are not perpendicular to each other.

Symptoms
Blurry or distorted vision, strain in the eye, eye discomfort, squinting and headaches are a few symptoms of astigmatism

Diagnosis:
If you notice the symptoms stated above, make sure you pay a visit to your ophthalmologist. If you are suffering from astigmatism, your doctor will do an eye test to check how much your eye is able to focus on light. After conducting his tests, he will determine how much power you have and you will have to wear glasses of that power. Apart from the option of wearing glasses or artificial lenses, you can also go for a surgery to correct the condition. LASIK is an option among the many other options of surgeries available.

Diet
Eat foods rich in sulphur. Foods like fish, green vegetables, pineapple, garlic, onion, olive oil, etc are rich in sulphur. Hence, eating these will help you battle astigmatism.

In case you have a concern or query you can always consult an expert & get answers to your questions!

3796 people found this helpful

Astigmatism: 6 Signs You Might Be Suffering From It!

Dr. Charu Tyagi 90% (20 ratings)
MBBS, MNAMS - Ophthalmology, DNB - Ophthalmology
Ophthalmologist, Noida
Astigmatism: 6 Signs You Might Be Suffering From It!

Astigmatism is a typical vision problem that occurs when the shape of the cornea is distorted due to injuries or other causes. With astigmatism, the lenses of the eye or the cornea curves. This irregular curve can change the way light refracts or passes through your retina. This causes hazy, fluffy, or twisted vision. Farsightedness and partial blindness are two different sorts of issues with the way light goes to your retina. Farsightedness is called hyperopia. Partial blindness is called astigmatism.

Types: There are two types of Astigmatisms. These are:

  1. Corneal astigmatism: It happens when your cornea itself is distorted.
  2. Lenticular astigmatism: Lenticular astigmatism happens when your lens is distorted.

Risks: Astigmatism can happen in youngsters and grown-ups. Your danger of creating astigmatism might be higher if you have any of the following:

  1. A family history of astigmatism or other eye issues like dislocation of the cornea.
  2. Scarring or diminishing of your cornea
  3. Excessive partial blindness, which makes foggy vision at a separation
  4. Excessive farsightedness, which makes hazy close-up vision
  5. A past of eye surgeries, for example, cataract surgery (surgical expulsion of a blurred focal point)

Symptoms: The side effects of astigmatism include:

  1. Hazy, Bended, Or Fluffy Vision At All Separations (Close-Up And Far Away)
  2. Trouble seeing during evening
  3. Lazy eye
  4. Squinting
  5. Irritation in the eye
  6. Cerebral Pains

Diagnosis:

  • Visual Acuity Assessment Test: Patients are required to read letters from a graph at a particular distance to decide how well they can see the letters.
  • Refraction Test: A refraction test uses a machine called an optical refractor. The machine has various remedial glass lenses that are used to read an outline while looking through lenses on the optical refractor.

Treatment:

  • Keratometry: Keratometry is a route for your specialist to measure the bend of your cornea. They will do this by taking a look at your eye through a keratometer.
  • Corrective Lenses: Remedial eyeglasses and contact lenses prescribed by a specialist are the most well-known and least obtrusive solution for astigmatism.
  • Orthokeratology: Orthokeratology is a treatment that uses contact lenses to correct the deformation and flow of your cornea. You will wear inflexible contact lenses for certain time-periods. It is easier to wear them while you are sleeping and remove them during the day.

SurgeryYour specialist may suggest refractive surgery if your case is a serious one. This kind of surgery includes use of lasers or little blades to reshape your cornea. This will correct astigmatism permanently. The three basic surgeries for astigmatism are:

  1. Laser in situ keratomileusis (LASIK)
  2. Photorefractive keratectomy (PRK)
  3. Spiral keratotomy (RK).

All these surgeries might carry some risks depending upon the symptoms of your problem. As innovation advances, it is very important for the patient to explore more options before choosing which refractive surgery is a good fit for him or her. If you wish to discuss about any specific problem, you can consult an Ophthalmologist.

3651 people found this helpful

What Are Breathing Contact Lenses?

Dr. Tejas D. Shah 88% (48 ratings)
MBBS, MS - Ophthalmology, Diploma in Ophthalmology , Fellowship in Cornea and Anterior Segment
Ophthalmologist, Ahmedabad
What Are Breathing Contact Lenses?

Variety of contact lenses is used to correct refractive errors. Soft Contact (hydrogel) Lenses are most often used in various types of refractive errors but they have certain disadvantages. These lenses do not permit adequate Oxygen to pass through which is essential for health of cornea and hence they can be worn for limited hours, i.e 6 to 8 hours maximum and never while sleeping. The tear proteins get deposited on these lenses which limit their life to about a year. If worn for prolonged period or proper measures not taken to clean the lenses, cornea can get an ULCER which at times can result in permanent loss of vision. Disposable daily wear lenses provide safer alternative but the cost increases significantly. Since soft contact lenses are applied after cleaning with a solution which can be the cause of mild to severe allergic conjunctivitis which can become intolerable. Soft contact lenses are not ideal in eyes with high corneal astigmatism.

Merits of soft contact lenses are that they can be dispensed over the counter or purchased on line though it is not ideal. A correct curvature and power of a contact lens is determined by a contact lens specialist/ Ophthalmologist after measuring exact corneal curvature and using trial contact lens. Another merit is that these lenses can be accepted very easily since even on the first day they do not produce much of discomfort. These lenses can be worn off and on without any inconvenience. Recent introduction of Toric Contact Lenses have made them more acceptable in cases of moderate corneal astigmatism.

Breathing Contact Lenses:

These lenses are the one which permit significant amount of oxygen to pass through and hence can be worn for prolonged interval without any adverse effect on the cornea. These are of two types

  1. Semisoft or Extended Wear RGP Contact Lenses: These lenses are made up of FP 92 which is a semi rigid soft plastic and is highly permeable to oxygen. These lenses are excellent for high refractive errors, especially in patients who have high corneal astigmatism. Even cases with irregular cornea or Keratoconus, these lenses can be accepted with rewarding results. These lenses can only be fitted by an expert Ophthalmologist since precise measurement has to be carried out and various trial lenses have to be tried to evaluate the optimum fit. The lenses are made to measurement and the patient has to be precisely trained to fit the lenses and maintain them. As stated, the lenses can be safely worn while sleeping and there is practically no danger of corneal toxicity or infection. These lenses may last for 4-5 years. One of the demerits of these lenses is that they take 5-6 days to adopt and the patient is advised to use them regularly. They are excellent alternative to LASIK surgery.
  2. Silicon Hydrogel Contact Lenses: These are recent introduction of extended wear contact lenses with capacity to 'breathe' better than soft or hrdrogel contact lenses. Some of the recent Silicon Hydrogel Contact lenses introduced by Alcon and Bausch and Lomb can be worn for a week or so.

Silicon hydrogel lenses though indicated for prolonged wear but can cause mild keratitis and sometimes allergic keratitis if worn overnight. These lenses still needs lot of improvement to be free of complications

Advise: It is ideal to consult an Ophthalmologist specialized in contact lenses for fitting of a proper contact lenses. Advertised lenses some time misguide and can be damaging to the eye.

4045 people found this helpful
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