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Optical Coherence Tomography (Oct) Tips

Risk Factors Associated With Computed Tomography!

Dr. Manjari Gupta 85% (10 ratings)
MBBS Bachelor of Medicine and Bachelor of Surgery, MD - Radiodiagnosis
Radiologist, Ghaziabad
Risk Factors Associated With Computed Tomography!

What is computed tomography?

Computed Tomography is more commonly known as CT scan. It is a specialized form of X-ray. Computed Tomography is a non-invasive diagnostic procedure. CT scan provides concise images of different body parts and can also divulge any internal bleeding or injury during emergency situations. It is absolutely painless and is known to provide accurate information.

How does it work?
The patient is required to lie down on a table which is then passed through an opening, circular in structure. The radiations are rotated inside the CT scan machine for processing the images of the required body parts.

Benefits of Computed Tomography

  1. Computed Tomography helps in the identification of any benign (tumor) or malignant (cancer) growth in any part of your body.
  2. The procedure can be conducted for different body parts such as the head, abdomen, spine and chest among many others.
  3. The images provide much detailed information. It contains information regarding the condition of blood vessel, soft tissue and bones.
  4. Various bones and muscular disorders are also identified via Computed Tomography.
  5. Radiation therapy or biopsy can be carried out with the aid of Computed Tomography.

Risk factors associated with Computed Tomography

  1. If a person is allergic to Iodine (a dye used in the process), then it must be informed to the doctor beforehand to avoid further complications such as itching, nausea or vomiting.
  2. At times, kidney functions may get disrupted.
  3. The radiation emitted during CT scan is known to be harmful, especially for children.
  4. The dye used for conducting CT scan can cause allergic reaction that can be life-threatening.

At times the doctor may advise anti-allergic drugs to patients who are allergic to the dyes used in the process. CT scan is otherwise a very safe procedure for diagnosing various diseases. In case you have a concern or query you can always consult an expert & get answers to your questions!

3339 people found this helpful

Computed Tomography - What All Should You Know?

MBBS ,MD ,DNB (Radiodiagnosis), Fellowship In Interventional Radiology
Radiologist, Mumbai
Computed Tomography - What All Should You Know?

What is computed tomography?

Computed Tomography is more commonly known as CT scan. It is a specialized form of X-ray. Computed Tomography is a non-invasive diagnostic procedure. CT scan provides concise images of different body parts and can also divulge any internal bleeding or injury during emergency situations. It is absolutely painless and is known to provide accurate information.

How does it work?
The patient is required to lie down on a table which is then passed through an opening, circular in structure. The radiations are rotated inside the CT scan machine for processing the images of the required body parts.

Benefits of Computed Tomography

  1. Computed Tomography helps in the identification of any benign (tumor) or malignant (cancer) growth in any part of your body.
  2. The procedure can be conducted for different body parts such as the head, abdomen, spine and chest among many others.
  3. The images provide much detailed information. It contains information regarding the condition of blood vessel, soft tissue and bones.
  4. Various bones and muscular disorders are also identified via Computed Tomography.
  5. Radiation therapy or biopsy can be carried out with the aid of Computed Tomography.

Risk factors associated with Computed Tomography

  1. If a person is allergic to Iodine (a dye used in the process), then it must be informed to the doctor beforehand to avoid further complications such as itching, nausea or vomiting.
  2. At times, kidney functions may get disrupted.
  3. The radiation emitted during CT scan is known to be harmful, especially for children.
  4. The dye used for conducting CT scan can cause allergic reaction that can be life-threatening.

At times the doctor may advise anti-allergic drugs to patients who are allergic to the dyes used in the process. CT scan is otherwise a very safe procedure for diagnosing various diseases.

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

4377 people found this helpful

Computed Tomography - What You Need To Know About it?

Dr. Sudhir Pudi 90% (80 ratings)
DNB (Radio Diagnosis), MBBS
Radiologist, Hyderabad
Computed Tomography - What You Need To Know About it?

What is computed tomography?

Computed Tomography is more commonly known as CT scan. It is a specialized form of X-ray. Computed Tomography is a non-invasive diagnostic procedure. CT scan provides concise images of different body parts and can also divulge any internal bleeding or injury during emergency situations. It is absolutely painless and is known to provide accurate information.

How does it work?
The patient is required to lie down on a table which is then passed through an opening, circular in structure. The radiations are rotated inside the CT scan machine for processing the images of the required body parts.

Benefits of Computed Tomography

  1. Computed Tomography helps in the identification of any benign (tumor) or malignant (cancer) growth in any part of your body.
  2. The procedure can be conducted for different body parts such as the head, abdomen, spine and chest among many others.
  3. The images provide much detailed information. It contains information regarding the condition of blood vessel, soft tissue and bones.
  4. Various bones and muscular disorders are also identified via Computed Tomography.
  5. Radiation therapy or biopsy can be carried out with the aid of Computed Tomography.

Risk factors associated with Computed Tomography

  1. If a person is allergic to Iodine (a dye used in the process), then it must be informed to the doctor beforehand to avoid further complications such as itching, nausea or vomiting.
  2. At times, kidney functions may get disrupted.
  3. The radiation emitted during CT scan is known to be harmful, especially for children.
  4. The dye used for conducting CT scan can cause allergic reaction that can be life-threatening.

At times the doctor may advise anti-allergic drugs to patients who are allergic to the dyes used in the process. CT scan is otherwise a very safe procedure for diagnosing various diseases.

5256 people found this helpful

Pre-surgery Testing - Know The Importance!

Dr. Harshavardhan Ghorpade 91% (37 ratings)
MBBS, MS
Ophthalmologist, Navi Mumbai
Pre-surgery Testing - Know The Importance!

Any patient who needs to undergo cataract surgery must be evaluated in a thorough manner so as to establish the requirement, appropriateness, expected surgical problems, expected benefits and co-morbid conditions having an influence on cataract surgery.

The preoperative assessment consists of--

A test for your existing glasses prescription:

It is useful for your cataract surgeon to know your existing glasses prescription in cases where there is a high refractive error (people who are very short or long sighted), in order to plan to correct this error after cataract surgery.

A full ocular examination: This includes looking at-

  • The eyelid anatomy and inflammation.
  • The state of the tear film, dry eye changes could make surgery difficult
  • The presence of abnormalities in the cornea that could make visualisation of the cataract difficult during surgery.
  • The amount of dilation the iris undergoes with dilating drops.

The type of cataract. Soft cataracts can be aspirated. Hard cataracts need more ultra-sound energy and surgical time to break up and remove. White cataracts may need trypan blue staining to visualize the capsule.

The measurement of intra-ocular pressure. With this test, we aim to exclude glaucoma and ensure optimal control of immediate pre-operative and intra-operative eye pressures often with extra eye drops that temporarily lower eye pressure.

Biometry Tests

This is a simple pre-operative measurement. It calculates the correct power of artificial intra-ocular lens. They will be implanted into your eye once your cataract is removed.

Corneal Topography

This is a test to map out the corneal curvature in greater detail. It is used prior to premium IOL Implantation like Toric IOLS either monofocal or multifocal , to ensure avoid postoperative refractive errors. This extra test is only required if the biometry readings show larger than normal differences in keratometry readings.

Optical Coherence Tomography (OCT)

This test allows detailed visualisation of the macula (the central sensitive part of the retina used for fine vision). If the ophthalmologist suspects any macula changes that may prevent a patient from visual improvement after cataract surgery, he always suggest optical coherence tomography.

Blood Pressure Measurements

It is very important to know your blood pressure measurements before your cataract operation. The risk of having a bleed at the back of your eye during cataract surgery (supra-choroidal haemorrhage) is very small (1 in 10000). But is higher if you have uncontrolled blood pressure.

Blood Sugar Measurements in Diabetic Patients

Cataract surgery itself does not affect your blood sugar measurements if you are diabetic. A routine checkup of blood sugars in diabetics before cataract surgery is done and the surgery if often delayed if the levels were greater than 20mmol/L as the risk of post-operative infection is higher. In case you have a concern or query you can always consult an expert & get answers to your questions!

4340 people found this helpful

The Importance of Pre-Surgery Testing

Dr. Minal Kaur 89% (358 ratings)
DNB Ophtalmology, MS - Ophthalmology, MBBS, Fellowship in Medical Retina, Fellowship in IOL & Cataract Microsurgery
Ophthalmologist, Faridabad
The Importance of Pre-Surgery Testing

Any patient who needs to undergo cataract surgery must be evaluated in a thorough manner so as to establish the requirement, appropriateness, expected surgical problems, expected benefits and co-morbid conditions having an influence on cataract surgery.

The preoperative assessment consists of -

A test for your existing glasses prescription:

It is useful for your cataract surgeon to know your existing glasses prescription in cases where there is a high refractive error (people who are very short or long sighted), in order to plan to correct this error after cataract surgery.

A full ocular examination: This includes looking at:

  • The eyelid anatomy and inflammation.
  • The state of the tear film, dry eye changes could make surgery difficult
  • The presence of abnormalities in the cornea that could make visualisation of the cataract difficult during surgery.
  • The amount of dilation the iris undergoes with dilating drops.
  • The type of cataract. Soft cataracts can be aspirated. Hard cataracts need more ultra-sound energy and surgical time to break up and remove. White cataracts may need trypan blue staining to visualize the capsule
  • The measurement of intra-ocular pressure. With this test, we aim to exclude glaucoma and ensure optimal control of immediate pre-operative and intra-operative eye pressures often with extra eye drops that temporarily lower eye pressure.

Biometry Tests: This is a simple pre-operative measurement. It calculates the correct power of artificial intra-ocular lens. They will be implanted into your eye once your cataract is removed.

Corneal Topography: This is a test to map out the corneal curvature in greater detail. It is used prior to premium IOL Implantation like Toric IOLS either monofocal or multifocal , to ensure avoid postoperative refractive errors. This extra test is only required if the biometry readings show larger than normal differences in keratometry readings.

Optical Coherence Tomography (OCT): This test allows detailed visualisation of the macula (the central sensitive part of the retina used for fine vision). If the ophthalmologist suspects any macula changes that may prevent a patient from visual improvement after cataract surgery, he always suggest optical coherence tomography.

Blood Pressure Measurements: It is very important to know your blood pressure measurements before your cataract operation. The risk of having a bleed at the back of your eye during cataract surgery (supra-choroidal haemorrhage) is very small (1 in 10000). But is higher if you have uncontrolled blood pressure.

Blood Sugar Measurements in Diabetic Patients: Cataract surgery itself does not affect your blood sugar measurements if you are diabetic. A routine checkup of blood sugars in diabetics before cataract surgery is done and the surgery if often delayed if the levels were greater than 20mmol/L as the risk of post-operative infection is higher.

2590 people found this helpful

Pre-Surgery Testing - Do You Think It Is Important?

Asg Eye Hospital 87% (15 ratings)
ABC
Ophthalmologist, Jodhpur
Pre-Surgery Testing - Do You Think It Is Important?

Any patient who needs to undergo cataract surgery must be evaluated in a thorough manner so as to establish the requirement, appropriateness, expected surgical problems, expected benefits and co-morbid conditions having an influence on cataract surgery.

The preoperative assessment consists of -

A test for your existing glasses prescription:

It is useful for your cataract surgeon to know your existing glasses prescription in cases where there is a high refractive error (people who are very short or long sighted), in order to plan to correct this error after cataract surgery.

A full ocular examination: This includes looking at:

  • The eyelid anatomy and inflammation.
  • The state of the tear film, dry eye changes could make surgery difficult
  • The presence of abnormalities in the cornea that could make visualisation of the cataract difficult during surgery.
  • The amount of dilation the iris undergoes with dilating drops.
  • The type of cataract. Soft cataracts can be aspirated. Hard cataracts need more ultra-sound energy and surgical time to break up and remove. White cataracts may need trypan blue staining to visualize the capsule
  • The measurement of intra-ocular pressure. With this test, we aim to exclude glaucoma and ensure optimal control of immediate pre-operative and intra-operative eye pressures often with extra eye drops that temporarily lower eye pressure.

Biometry Tests: This is a simple pre-operative measurement. It calculates the correct power of artificial intra-ocular lens. They will be implanted into your eye once your cataract is removed.

Corneal Topography: This is a test to map out the corneal curvature in greater detail. It is used prior to premium IOL Implantation like Toric IOLS either monofocal or multifocal , to ensure avoid postoperative refractive errors. This extra test is only required if the biometry readings show larger than normal differences in keratometry readings.

Optical Coherence Tomography (OCT): This test allows detailed visualisation of the macula (the central sensitive part of the retina used for fine vision). If the ophthalmologist suspects any macula changes that may prevent a patient from visual improvement after cataract surgery, he always suggest optical coherence tomography.

Blood Pressure Measurements: It is very important to know your blood pressure measurements before your cataract operation. The risk of having a bleed at the back of your eye during cataract surgery (supra-choroidal haemorrhage) is very small (1 in 10000). But is higher if you have uncontrolled blood pressure.

Blood Sugar Measurements in Diabetic Patients: Cataract surgery itself does not affect your blood sugar measurements if you are diabetic. A routine checkup of blood sugars in diabetics before cataract surgery is done and the surgery if often delayed if the levels were greater than 20mmol/L as the risk of post-operative infection is higher.

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

6430 people found this helpful

Diabetic Macular Oedema - How It Can Be Detected?

Asg Eye Hospital 87% (15 ratings)
ABC
Ophthalmologist, Jodhpur
Diabetic Macular Oedema - How It Can Be Detected?

The diabetic eye is considered to be the leading cause of the blindness among the working age. It is usually caused by the change in the blood vessels on the retina of the eye. Retina is that layer of the eye which is light sensitive. In case of diabetic macular oedema, the blood vessels cause the fluid to leak into the retina.

How does diabetic macular oedema cause vision loss?
The loss of vision only occurs when the fluid reaches the macula. Macula is the center of the retina which is responsible for a sharp vision. When the fluid reaches the macula it builds up and causes inflammation. Initially this is not noticed but with time the diabetic macular oedema causes a change in the vision making it more blurred. A healthy macula is very essential for a good vision.

Who is at risk of diabetic macular oedema?
People with type 1 and type 2 diabetes are at a higher risk of getting diabetic macular oedema. Also other risk factors are:
1. About 0ne in three people with diabetes develop macular oedema
2. Poor control of blood sugars
3. High blood pressure
4. High cholesterol level
5. Pregnancy
6. In smokers

How to reduce the risks of diabetic macula oedema?
The risk of diabetic macula oedema can be reduced by quitting smoking, and to make sure that blood sugar and cholesterol levels are under control. This is achieved by regularly measuring the cholesterol and blood sugar levels.

How is diabetic macular oedema detected?
Diabetic macular oedema can be detected during regular visits to the doctor. Patients with diabetes should be offered screening tests. Digital photographs of the patients can be taken as they show the early signs of diabetic macular oedema, though changes in vision might not be noticed at this time.

What happens when you attend the medical retina clinic?
When you go for an eye checkup you will undergo a comprehensive examination which includes:

1. Visual acuity test: This is a sight test which measures how well you can see the different distances

2. Eye pressure test: This test is done to measure the pressure of the eyes and usually drops which numb the eyes are used when this test is conducted

3. Dilated eye examination: In this the drops are placed in the eye to dilate the pupils and then the back of the eye is examined.

4. Fluorescein angiography: This is a diagnostic test in which an injection of fluorescein dye is given in the hand and then the photographs are taken.

5. Optical coherence tomography: This is done to measure the retinal swelling.

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

4179 people found this helpful

What Should You Know About Diabetic Macular Oedema

Bharti Eye Hospitals 88% (25 ratings)
Cornea Cataract & Lasik
Ophthalmologist, Delhi
What Should You Know About Diabetic Macular Oedema

The diabetic eye is considered to be the leading cause of the blindness among the working age. It is usually caused by the change in the blood vessels on the retina of the eye. Retina is that layer of the eye which is light sensitive. In case of diabetic macular oedema, the blood vessels cause the fluid to leak into the retina.

How does diabetic macular oedema cause vision loss:
The loss of vision only occurs when the fluid reaches the macula. Macula is the center of the retina which is responsible for a sharp vision. When the fluid reaches the macula it builds up and causes inflammation. Initially this is not noticed but with time the diabetic macular oedema causes a change in the vision making it more blurred. A healthy macula is very essential for a good vision.

Who is at risk of diabetic macular oedema:
People with type 1 and type 2 diabetes are at a higher risk of getting diabetic macular oedema. Also other risk factors are:

  1. About 0ne in three people with diabetes develop macular oedema
  2. Poor control of blood sugars
  3. High blood pressure
  4. High cholesterol level
  5. Pregnancy
  6. In smokers

How to reduce the risks of diabetic macula oedema:
The risk of diabetic macula oedema can be reduced by quitting smoking, and to make sure that blood sugar and cholesterol levels are under control. This is achieved by regularly measuring the cholesterol and blood sugar levels.

How is diabetic macular oedema detected:
Diabetic macular oedema can be detected during regular visits to the doctor. Patients with diabetes should be offered screening tests. Digital photographs of the patients can be taken as they show the early signs of diabetic macular oedema, though changes in vision might not be noticed at this time.

What happens when you attend the medical retina clinic:
When you go for an eye checkup you will undergo a comprehensive examination which includes:

  1. Visual acuity test: This is a sight test which measures how well you can see the different distances
  2. Eye pressure test: This test is done to measure the pressure of the eyes and usually drops which numb the eyes are used when this test is conducted
  3. Dilated eye examination: In this the drops are placed in the eye to dilate the pupils and then the back of the eye is examined.
  4. Fluorescein angiography: This is a diagnostic test in which an injection of fluorescein dye is given in the hand and then the photographs are taken.
  5. Optical coherence tomography: This is done to measure the retinal swelling
type diabetes
3385 people found this helpful

All About Diabetic Macular Oedema!

Dr. Tejas D. Shah 88% (48 ratings)
MBBS, MS - Ophthalmology, Diploma in Ophthalmology , Fellowship in Cornea and Anterior Segment
Ophthalmologist, Ahmedabad
All About Diabetic Macular Oedema!

The diabetic eye is considered to be the leading cause of the blindness among the working age. It is usually caused by the change in the blood vessels on the retina of the eye. Retina is that layer of the eye which is light sensitive. In case of diabetic macular oedema, the blood vessels cause the fluid to leak into the retina.

How does diabetic macular oedema cause vision loss:
The loss of vision only occurs when the fluid reaches the macula. Macula is the center of the retina which is responsible for a sharp vision. When the fluid reaches the macula it builds up and causes inflammation. Initially this is not noticed but with time the diabetic macular oedema causes a change in the vision making it more blurred. A healthy macula is very essential for a good vision.

Who is at risk of diabetic macular oedema:
People with type 1 and type 2 diabetes are at a higher risk of getting diabetic macular oedema. Also other risk factors are:

  1. About 0ne in three people with diabetes develop macular oedema
  2. Poor control of blood sugars
  3. High blood pressure
  4. High cholesterol level
  5. Pregnancy
  6. In smokers

How to reduce the risks of diabetic macula oedema:
The risk of diabetic macula oedema can be reduced by quitting smoking, and to make sure that blood sugar and cholesterol levels are under control. This is achieved by regularly measuring the cholesterol and blood sugar levels.

How is diabetic macular oedema detected:
Diabetic macular oedema can be detected during regular visits to the doctor. Patients with diabetes should be offered screening tests. Digital photographs of the patients can be taken as they show the early signs of diabetic macular oedema, though changes in vision might not be noticed at this time.

What happens when you attend the medical retina clinic:
When you go for an eye checkup you will undergo a comprehensive examination which includes:

  1. Visual acuity test: This is a sight test which measures how well you can see the different distances
  2. Eye pressure test: This test is done to measure the pressure of the eyes and usually drops which numb the eyes are used when this test is conducted
  3. Dilated eye examination: In this the drops are placed in the eye to dilate the pupils and then the back of the eye is examined.
  4. Fluorescein angiography: This is a diagnostic test in which an injection of fluorescein dye is given in the hand and then the photographs are taken.
  5. Optical coherence tomography: This is done to measure the retinal swelling

If you wish to discuss any specific problem, you can consult an ophthalmologist.

4920 people found this helpful

Diabetic Macular Edema - Know More About It!

Dr. Neha Shukla 88% (61 ratings)
DOMS, MBBS
Ophthalmologist, Delhi
Diabetic Macular Edema - Know More About It!

 Diabetic Macular Edema (DME) is an accumulation of fluid in the macula(part of the retina that controls our most detailed vision abilities)due to leaking blood vessels. DME develops in eyes wth diabetic retinopathy. Diabetic retinopathy is a disease that damages the blood vessels in the retina, resulting in vision impairment. Left untreated, these blood vessels begin to build up pressure in the eye and leak fluid, causing DME.

DME is associated with: 

  1. Those who have had diabetes for an extended amount of time
  2. Severe hypertension (high blood pressure)
  3. Fluid retention
  4. Hypoalbuminemia (low levels of protein in body fluids)
  5. Hyperlipidemia (high levels of fats in the blood)

Symptoms: Common symptoms of DME are

  1. Blurry vision
  2. Floaters
  3. Double vision
  4. Eventually blindness if it goes untreated

Who is at risk of diabetic macular oedema:

About 1 in 3 people with diabetes develop macular Eedema. People with type 1 and type 2 diabetes are at a higher risk of getting diabetic macular oedema. Also other risk factors are:

  1. Poor control of blood sugars
  2. High blood pressure
  3. High cholesterol level
  4. Pregnancy
  5. In smokers

How is diabetic macular oedema detected:
Diabetic macular oedema can be detected during regular visits to the doctor. Patients with diabetes should be offered screening tests. Digital photographs of the patients can be taken as they show the early signs of diabetic macular oedema, though changes in vision might not be noticed at this time.

What happens when you attend the medical retina clinic:
When you go for an eye checkup you will undergo a comprehensive examination which includes:

  1. Visual acuity test: This is a sight test which measures how well you can see the different distances
  2. Eye pressure test: This test is done to measure the pressure of the eyes and usually drops which numb the eyes are used when this test is conducted
  3. Dilated eye examination: In this the drops are placed in the eye to dilate the pupils and then the back of the eye is examined.
  4. Fluorescein angiography: This is a diagnostic test in which an injection of fluorescein dye is given in the hand and then the photographs are taken.
  5. Optical coherence tomography: This is done to measure the retinal swelling

How to reduce the risks of diabetic macula oedema:
The risk of diabetic macula oedema can be reduced by quitting smoking, and to make sure that blood sugar and cholesterol levels are under control. This is achieved by regularly measuring the cholesterol and blood sugar levels. If you wish to discuss about any specific problem, you can consult an ophthalmologist.

2721 people found this helpful
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