Showing posts with label Glaucoma causes. Show all posts
Showing posts with label Glaucoma causes. Show all posts

Thursday, November 29, 2018

Glaucoma Wiki - Everthing About Glaucoma Disease

Glaucoma
Glaucoma is the name given to a group of eye diseases in which the optic nerve at the back of the eye is slowly destroyed. In most people this damage is due to an increased pressure inside the eye - a result of blockage of the circulation of aqueous, or its drainage. In other patients the damage may be caused by poor blood supply to the vital optic nerve fibres, a weakness in the structure of the nerve, and/or a problem in the health of the nerve fibres themselves.

Over 300,000 Australians have glaucoma. While it is more common as people age, it can occur at any age. As our population becomes older, the proportion of glaucoma patients is increasing.

Glaucoma Causes & Symptoms

Chronic (primary open-angle) glaucoma is the most common type. It has no symptoms until eye sight is lost at a later stage.

Damage progresses very slowly and destroys vision gradually, starting with the side vision. One eye covers for the other, and the person remains unaware of any problem until a majority of nerve fibres have been destroyed, and a large part of vision has been destroyed. This damage is irreversible. It is progressive and usually relentless. Treatment cannot recover what has been lost. But it can arrest, or at least slow down, the damage process. That is why it is so important to detect the problem as early as possible, to be able to start treatment with as little damage to the vision as possible.


  • normal vision
  • mild to moderate loss
  • severe visual loss


Glaucoma Risks

Although anyone can get glaucoma, some people have a higher risk, i.e. those with:


  • a family history of glaucoma;
  • diabetes;
  • migraine;
  • short sightedness (myopia);
  • long sightedness (hyperopia);
  • eye injuries;
  • high blood pressure; or
  • past or present use of cortisone drugs (steroids).

People in these groups should have their first eye check no later than the age of 35. For most people, it is recommended to have an eye check for glaucoma by the age of 40.

Glaucoma Types

Chronic (primary open-angle) glaucoma

This is the most common form of this disease. However, other forms occur.

Low-tension or normal tension glaucoma

Occasionally optic nerve damage can occur in people with so-called normal eye pressure. This form of glaucoma is treated in the same manner as open-angle glaucoma.


Acute (angle-closure) glaucoma


Acute glaucoma is when the pressure inside the eye rapidly increases due to the iris blocking the drain. An attack of acute glaucoma is often severe. People suffer pain, nausea, blurred vision and redness of the eye. Immediate medical help should be sought. If treatment is delayed there can be permanent visual damage in a very short time. Usually, laser surgery performed promptly can clear the blockage and protect against visual impairment.

severe visual loss
normal vision
Mild to moderate loss

Congenital glaucoma
This is a rare form of glaucoma caused by an abnormal drainage system. It can exist at birth or develop later. Parents may note that the child is sensitive to light, has enlarged and cloudy eyes, and excessive watering. Surgery is usually needed.

Secondary glaucomas
These glaucomas can develop as a result of other disorders of the eye such as injuries, cataracts, or eye inflammation. The use of steroids (cortisone) has a tendency to raise eye pressure and therefore pressures should be checked frequently when steroids are used.

How is glaucoma detected?
Regular eye examinations are the best way to detect glaucoma early.

A glaucoma test usually includes the following:


  • optic nerve check with an ophthalmoscope;
  • eye pressure check (tonometry);
  • visual field assessment if needed — this tests the sensitivity of the side vision, where glaucoma strikes first.

Can glaucoma be treated?
Although there is no cure for glaucoma it can usually be controlled and further loss of sight either prevented or at least slowed down.

Glaucoma Treatments


Glaucoma Eyedrops - these are the most common form of treatment and must be used regularly. In some cases pills are prescribed. The drops can be varied to best suit the patient and the type of glaucoma.
Laser (laser trabeculoplasty) - this is performed when eyedrops do not stop deterioration in the field of vision. In many cases eyedrops will need to be continued after laser. Laser does not require a hospital stay.
Glaucoma Surgery (trabeculectomy) -  this is performed usually after eyedrops and laser have failed to control the eye pressure. A new channel for the fluid to leave the eye is created.


Treatment can save remaining vision but it does not improve eye sight.

Monday, November 26, 2018

Glaucoma Symptoms - Tests - Indicators and Analyze

Glaucoma Vision

Eye specialists routinely check visual keenness, or sharpness of vision dependent on how well the patient can peruse an eye graph. 

Glaucoma is a genuine eye condition in which the optic nerve ends up harmed, more often than not because of expanded weight in the eye. 

In spite of the fact that glaucoma as a rule doesn't cause clear side effects at first, some early cautioning signs may demonstrate its beginning. 

With incite treatment for glaucoma, you might have the capacity to forestall or moderate the loss of your fringe or side vision. Fringe vision misfortune (otherwise called a fringe field imperfection) can weaken into limited focus. At the point when the main usable vision is from the focal point of the eye, it can make the impact of seeing through a tube or passage. 

In the event that glaucoma proceeds without treatment, your vision — notwithstanding when looking straight ahead — can decline until the point when you turn out to be thoroughly visually impaired. Glaucoma is one of the main sources of visual deficiency, alongside age-related macular degeneration and waterfalls. (3) 

Indications of Glaucoma


Visit an eye specialist (ophthalmologist) quickly for an entire eye exam on the off chance that you see any of these notice signs: 

  • Trouble modifying your vision to an obscured room 
  • Inconvenience concentrating on close or far items 
  • Abnormal affectability to light or glare 
  • Squinting or flickering at a brilliant light or a glare 
  • Change in the shade of your iris (hued part of the eye) 
  • Red-rimmed, encrusted, or swollen eyelids 
  • Tenacious agony in or around your eyes 
  • Twofold vision 
  • Dim spot at the focal point of your vision 
  • Seeing lines and edges that appear to be wavy or twisted 
  • Overabundance tearing or watery eyes 
  • Dry eyes that tingle or consume 
  • Seeing spots or phantom like pictures 
  • Look for crisis therapeutic consideration on the off chance that you encounter any of the accompanying side effects: 
  • Serious cerebral pain and eye torment 
  • Sudden loss of vision in one eye 
  • Sudden dim or obscured vision 
  • Flashes of light or dark spots in your vision 
  • Radiances or rainbows around light in your vision 

Glaucoma Symptoms


Indications may travel every which way at first, or compound after some time. 

Glaucoma Analyze


Customary eye exams by an eye specialist are the most ideal approach to identify glaucoma. 

The American Foundation of Ophthalmology (AAO) prescribes that everybody get a standard eye exam by age 40, or sooner in the event that you have chance elements for eye infection, for example, hypertension or diabetes. (5) 

Amid an eye exam, the specialist will gather a patient's medicinal history and check a few variables, including visual keenness (sharpness of vision dependent on how well the patient can peruse an eye outline). Following on a thorough eye exam, the specialist can exhort you on how frequently to have your eyes checked. 

The AAO prescribes glaucoma screening: 

Like clockwork starting at age 40, on the off chance that you don't have any hazard factors 

At regular intervals in case you're over age 65 or at high hazard (6) 

Glaucoma Test


Amid your visit, the eye specialist may play out various distinctive systems, including: 

Glaucoma Examination


Your specialist will utilize unique eye drops to enlarge your understudies, which enables all the more light to enter the eye and makes it simpler for the specialist to look at the back of your eye. 

In patients with glaucoma, a thorough expanded exam may demonstrate changes in the shape and shade of the optic nerve strands. 

Notwithstanding recognizing glaucoma, expansion makes it simpler for your specialist to analyze different ailments — including retinopathy because of diabetes or hypertension, a confined retina, or macular degeneration — at their soonest arranges. 

The National Eye Organization (NEI) prescribes that individuals age 60 and more seasoned get a yearly enlarged eye exam. 

Know that widening can obscure your vision and make your eyes more delicate to light. This can influence your capacity to peruse, drive, or labor for a couple of hours. 

Different tests used to distinguish glaucoma include: 

Glaucoma Symptoms

Glaucoma Tonometry Test


This test estimates the weight inside your eye. It's easy and causes insignificant distress. 

The most exact types of the test measure the power expected to quickly straighten a zone of your cornea (clear layer at the front of the eye). 

To begin with, your specialist will utilize eye drops to numb the surface of your eye and apply an orange color to incidentally recolor the eye. 

At that point your specialist will put an instrument known as an opening light before you. Resting your button and brow on a help keeps your head unfaltering as the opening light is advanced until the tip of the gadget just contacts your cornea. 

A blue light on the light makes the orange color sparkle green. Your specialist will look however an eyepiece on the light, and alter a dial on the gadget to peruse your eye weight. 

Specialists can rather utilize a hand-held, pencil-formed gadget that contacts your eye and quickly records the weight. 

Another approach to quantify eye weight is with a gadget that shoots a puff of air into your eye. As you gaze into the machine, the specialist sparkles a light into your eye, and afterward you'll feel a speedy puff of air. 

This technique causes no uneasiness. The machine estimates your eye weight dependent on how the light reflections change as the air hits your eye. 

Gonioscopy 

In this technique, your specialist looks at the waste point of your eye utilizing a unique contact focal point. The point is the place the cornea and the iris meet. 

Glaucoma Test

Ophthalmoscopy 

This technique gives your specialist a chance to analyze the back of your eye (known as the fundus), including the retina, optic plate, and veins.

Pachymetry 

A test called a pachymeter is utilized to quantify the thickness of the cornea. Corneal thickness is critical in light of the fact that it can influence the perusing of intraocular eye weight (IOP). High eye weight is a hazard factor for glaucoma. Individuals with thin corneas may have incorrectly low IOP readings, while individuals with thick corneas may demonstrate a higher-than-genuine IOP. (11) 

Perimetry 

Otherwise called a visual field test, this method estimates the extent of focal and fringe vision and distinguishes vulnerable sides. 

Sunday, November 18, 2018

Glaucoma Causes - Do I Have Glaucoma

The front of the eye is a D-molded chamber in which the focal point and iris (the hued part) make up the straight divider, while the cornea (the surface of the eye) frames the bended divider. An organ behind the upper eyelid fills this chamber with a reasonable fluid (watery funniness) that provisions the front of the eye with oxygen and supplements and keeps it swelled. An enduring supply of fluid is delivered, and it depletes out through a work of modest openings behind the lower eyelid, called the trabecular meshwork.

In glaucoma, the fluid is created typically however the trabecular meshwork can't deplete it because of stopping up or some other reason. Fluid weight develops in the eye, pushing on the optic nerve (the nerve that interfaces the eye to the mind). The nerve cells are then gradually choked of blood, in the long run biting the dust. The external nerves bomb first, so vision misfortune will in general begin at the edges, advancing to "exclusive focus" and visual impairment. Numerous individuals don't see this at first, and there's typically no agony, so glaucoma can be very best in class before it's identified. The US Glaucoma Establishment appraises that just half individuals with glaucoma know about the malady.



Kinds of glaucoma are arranged by what's preventing the fluid from depleting: 

Essential open-point glaucoma (POAG) is the most widely recognized type of glaucoma in North America, influencing around 1 out of 100 individuals. Individuals of African plummet are particularly powerless. It regularly strikes after the age of 50. The trabecular meshwork looks fine on examination yet doesn't deplete legitimately. A few analysts trust this is on the grounds that maturing makes the phones less effective. Others speculate a seepage issue under the eye, or another imperfection. Regardless, weight develops and the optic nerve begins to come up short. Vulnerable sides in the end show up in the fringe vision, and later in the focal "seeing" region. This harm can't be fixed. POAG deteriorates after some time in the event that it isn't dealt with.

Point conclusion glaucoma is most basic in individuals of Asian or Inuit plummet, and in ladies and farsighted individuals. It very well may be ceaseless or discontinuous. Since the trabecular meshwork is situated in the edge of the D between the iris and the cornea, anything that swells the iris or pushes it forward can close that edge, obstructing the meshwork. Certain ailments, for example, diabetes or uveitis (fiery state of the eye), can make the iris be pushed forward. Maturing additionally will in general thicken the focal point and iris, blocking fluid stream between the front and back assemblies of the eye. Weight works in the back chamber (the fundamental piece of the eyeball), driving the iris forward and shutting the trabecular meshwork.



In typical strain glaucoma, the weight in the eye is in the ordinary range, yet the optic nerve is as yet harmed. It's trusted that poor blood stream to the optic nerve makes the nerves more defenseless. Weights only somewhat better than expected can along these lines harm the eye.

Pigmentary glaucoma generally influences more youthful partially blind individuals. The iris, which is inward in nearsightedness, rubs against the shade layer that holds the eye's shading. Pieces of color rub off and stop up the trabecular meshwork, raising weight. Peeling disorder, most regular in Caucasians matured 50 and more seasoned, is comparative. Flaky white material shows up on the focal point before tumbling off to stop up the meshwork. Peeling disorder doesn't really result in glaucoma, yet it makes it multiple times more probable.

Awful glaucoma is the consequence of eye damage, regularly showing up a very long time after the occasion.