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Amblyopia is commonly known as 'Lazy Eye'. It is a vision development disorder, which affects eyes and the brain during infancy and childhood. It signifies that the eye does not achieve a normal visual acuity even with refractive correction in form of glasses or contact lens. During normal visual development, the eye and brain learns to 'see' and develop binocularity, that is the ability to perceive depth (Stereoacuity). This occurs in the first 8 to 10 years of life.
Each eye transmits a clear and identical image from retina to the brain, which fuses the two images into a single image with 3 dimensions ( adding depth). When the image is formed on the retina of two eyes is too dissimilar, the brain cannot fuse the two images and suppresses the more blurred image. As a result, the worse eye does not learn to 'see' and becomes 'lazy'. This condition is seen in 1-4% of population.
The common causes for dissimilar images or Amblyopia are:
1. Misalignment of the eyes or squint: It is the primary reason for Amblyopia is misalignment of the eyes. In case, both your eyes are not aimed in the same direction, the image captured by each eye is different , resulting in diplopia. The brain will see from the dominant eye and suppress image from the other eye. Over a prolonged period of time, the eye dissociates from the visual cortex of the brain.
2. Refractive Amblyopia:
- Unequal refractive error in both eye. When the eye power of both eyes differ by more than 1.5D of spherical equivalent, which results in dissimilar images between the two eyes. As a result, the visual development in restricted in the worse eye.
- High refractive error or astigmatism in both eyes, since there is a blurred image in both eyes, the normal vision development does not occur in either eyes resulting in bilateral lazy eyes.
3. Cloudiness in visual system or visual deprivation Amblyopia: Any kind of obstruction or cloudiness in the normal visual axis of the eye tissues can lead to Amblyopia. Disorder of any kind, which blocks a clear image from being focused blocks the formation of a clear image on your retina. Commonly due to congenital or developmental cataracts or corneal opacities or prolonged closure of one eye in early childhood( drooping of one eyelid, eyelid swelling, patching of one eye).
Treatment for Amblyopia: For treatment of Amblyopia, a child must be compelled to utilize his affected, weaker eye. This can be done by correction of causative factor such as, treating refractive error with glasses, surgical correction of misalignment of eyes followed by patching and vision therapy, cataract surgery.
Patching or occlusion of the good eye: This is done to force the brain to pay attention to visual input from the worse eye. This allows nerve connections between affected eye and brain to develop due to, which the eye 'learns to see'. Eye drops such as atropine are also used for blurring the vision of the good eye. Some form of vision therapy may also be required to train both eyes to see together and develop some degree of depth perception.
To be effective, treatment should be implement as early as possible , within the period of normal visual development best within first 8 years of life. Some visual gain has been seen in selected patients up to age of 14 to 18 years. This also highlights the importance of a comprehensive eye examination as a routine in young children. If you wish to discuss about any specific problem, you can consult an Ophthalmologist.
You never tend to pay a lot of attention to your eyes unless they are affected by some serious disorder or unless your vision is disrupted. But did you know that your eyes are capable of doing much more than you can imagine? here are 10 surprising facts about your eyes you didn't know about.
1. How intricate!
Your eyes take more than 2 million working parts to function. No wonder your eyes are the second most complex organ of your body after your brain.
2. A lot depends on them
As much as 80% of your memories are determined by what you see. Also, 80% of what you learn is because of your eyes.
3. Retina and security
The iris of your eyes has approximately 256 unique characteristics, which is more than even your fingerprints. This is the reason why retina scans are used so widely today for security purposes.
4. It's a colourful world
Your eyes can distinguish between approximately 10 million different colours. And women with a particular kind of genetic mutation can see millions of more colours.
The retina of your eyes receives the vision of the outside world as upside down. It is your brain, which flips the image for you so that you can see the world as it is.
6. Sunscreen for the eyes?
It is possible for your eyes to get sunburnt. Therefore, it is advisable for you to wear sunglasses in order to protect your eyes from the ultraviolet radiations.
The eye muscle is the muscle that reacts at the fastest rate out of all the other muscles in your body. It can contract in less than even 1/100th of a second.
8. Paint it red?
The retina of your eyes cannot detect the red colour. The retinas do have green, red and blue receptors, but the red receptor can detect only the colour yellow-green and the green one can recognise blue-green. It is your brain that combines these signals to give you the impression of the colour red.
9. Dreams and sight
Even if you become blind later in life, you can see images in your dreams if you were born with sight.
10. We are blink-eyed peas
You blink approximately 17 times every minute. That makes it 5.2 million times in a year. If you wish to discuss about any specific problem, you can consult an Ophthalmologist.
Have pressure in eyes. GOT CHECK UP DONE. FINE. EYE DROPS -NEPALACT and ALPHAGAN Z. STILL PERSISTING. Vision Perfect. PLadvise.
I have a family history of Glaucoma I have high myopia I have -14 number in both eyes I have thin retina due to which I see black spots in front of my eyes and also linings. Now my eye specialist told me to have check for Glaucoma as during her observation she suspected POAG but I have undergone through few tests like CCT and OCT and after seeing the report doctor said the reports are ok but still she needs reports one more test and that is humphrey visual fields afterwards she will be able to tell me whether I shud start medicine or not. I am confused and afraid right now whether I will loose my vision or am I safe. Please assist after considering all my problems.
My mother have diabetes from past 12 years, also have diabetic retinopathy since 3 years, hypertension since 4 years .the reports came abnormal so please tell the advice and prescription.
Is it 100% safe to eye surgery for remove specs? Because my eye doctor wear specs and also advice for remove specs by laser. I am afraid of if fail what is the disadvantages? (my number is now stable)
My mother is facing an eye problem. Her right eye pupil expand and contract time to time some time it expands so much. Which cause her headache. I had gone through checkup. Dr. Told it is sign of glaucoma and due to eye pressure it happened. They Done laser operation by telling that it is glaucoma initial stage. For a month she was alright but again she is facing same problem.
Every person with diabetes, should get their retina (the film at the back of the eye) checked once a year. This is irrespective of whether you think your diabetes is 'mild' or 'under control', as even newly diagnosed diabetics can have retinal changes (diabetic retinopathy). You will not notice any changes in your vision until the condition is advanced. If diagnosed early, this can be treated without significant damage to your vision. So, it is important to make an annual retinal check a routine part of your life if you have diabetes. Examination is done after putting in drops to dilate your pupils and is ideally accompanied by photographing the back of your eye to document any changes, so any progression can be monitored and treated early if required.
Computer Vision Syndrome (CVS), also known as digital eyestrain, is a group of vision-related problems arising due to prolonged use of computer, smartphones and tablets. Many people experience visual discomfort while viewing digital screens for a long period.
A good rule to follow is often called the 20-20-20 rule. When working at a
computer: every 20 minutes, look away from your computer screen and
find an object that’s at least 20 feet away to look at for 20 seconds. This
relaxes eye alignment and focusing muscles that are used for close up
work, reducing your risk of eyestrain and eye fatigue. If you still have
problems please see your eye specialist, who will be able to advise further
and also check your eyes in detail for any problems.
Glaucoma is a group of diseases that can lead to damage to the eye's optic nerve and result in blindness. Open-angle glaucoma, the commonest form of glaucoma, has no symptoms at first. However, over the years it can steal your sight. With early treatment, you can usually protect your eyes against serious vision loss and blindness. Most people over the age of 40 should have an annual eye check, which includes measurement of eye pressure and assessment of the optic nerve, this is more important if you have a family history of glaucoma.
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:
- Corneal astigmatism: It happens when your cornea itself is distorted.
- 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:
- A family history of astigmatism or other eye issues like dislocation of the cornea.
- Scarring or diminishing of your cornea
- Excessive partial blindness, which makes foggy vision at a separation
- Excessive farsightedness, which makes hazy close-up vision
- A past of eye surgeries, for example, cataract surgery (surgical expulsion of a blurred focal point)
Symptoms: The side effects of astigmatism include:
- Hazy, Bended, Or Fluffy Vision At All Separations (Close-Up And Far Away)
- Trouble seeing during evening
- Lazy eye
- Irritation in the eye
- Cerebral Pains
- 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.
- 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.
Surgery: Your 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:
- Laser in situ keratomileusis (LASIK)
- Photorefractive keratectomy (PRK)
- 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 a ophthalmologist.
Most of us take our eyes for granted. It has been often noticed that an individual splurges on expensive sunglasses for looking smarter. But, when it comes to the health of eyes, he or she is either ignorant or simply reluctant to do anything. This tendency is bad for the health of your precious eyes.
Remember, how you use them to stare at the screens of your gadgets all day long. Take out some time from your busy schedule and take care of your eyes. They are precious and vulnerable too.
Follow the tips below to keep your eyesight intact till your dying day:
- Eat right for a good vision: It is very important to provide the right and sufficient amounts of nutrients to your body for developing or maintaining a good eye sight. Include nutrients such as omega-3 fatty acids, lutein, zinc, and vitamins C and E in your regular diet to boost your eyesight. Food items like green and leafy vegetables, salmon, tuna, and other oily fish, eggs, nuts, beans, and other non-meat protein sources, oranges and other citrus fruits or juices and oysters and pork are excellent for the eye. The intake of a balanced diet keeps you away from diabetes, which causes blindness.
- Give up smoking: Cigarettes or other tobacco products are bad for your eyes. They make your eyes more vulnerable to diseases like cataracts, optic nerve damage, and macular degeneration.
- Guard your eyes from sunlight: It has been found that long exposure to sunlight leads to damage of the eyeballs. This happens as the UV rays in sunlight have an adverse impact on our eyes. You must put on sunglasses when you are outdoors for a longer period. You must choose sunglasses which give you 90 to 100 percent protection against sunlight. UV rays can cause cataracts and macular degeneration.
- Avoid the screen: It is advisable to not spend long hours sitting in front of the computer screen or TV. Take breaks while working on the computer. Also, remember blinking your eyes while staring at the screen to avoid drying up of the eyes. Blinking increases tear production, keeping the eyes moist and healthy.
- Use safety devices: If you work with hazardous substances, it is advisable that you put on safety devices on your eyes for their protection.
- Hydrate your eyes: In order to have a good vision, you must hydrate your eyes by splashing water on your eyes wide open at specific intervals in a day. When you wash your face after returning from outside, don't forget to wash your eyes as well. As you splash water on the eyes, the dust particles on the surface of the eyelid, gathered from outside, gets washed away. f you wish to discuss about any specific problem, you can consult a ophthalmologist.