Glaucoma Cataracts Diabetes

Glaucoma  Cataracts  Diabetes 
Peter D’Arcy OPTOMETRIST BEGA monitors such conditions utilising where necessary Canon OCT (optical coherence tomography) to aid in evaluation ensuring maximum vision is preserved and corrected. The latest Canon OCT  allows for high resolution evaluation of eye anatomy eg  high definition cross sectional and three dimensional images to determine the extent of complications.

The prevalence of diabetes is climbing rapidly and can result in a number of serious complications including diabetic eye disease.
We can monitor Visual fields by Medmont computerised perimetry and assess vision and referral including cataracts.​

Your eyetest for glaucoma

Risk Factors 

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  • A family history of glaucoma
  • High eye pressure
  • Age over 50
  • African or Asian descended ethnicity
  • Diabetes
  • Short or long sightedness
  • Previous history of eye injury
  • Past or present prolonged use of cortisone drugs
  • Migraine
  • High or low blood pressure

Glaucoma is the leading cause of irreversible blindness worldwide.​Half  of people with this condition  in Australia are undiagnosed.

There may be no warning symptoms.
More than 95% is undiagnosed in developing countries.

Early detection and adherence to treatment are vital to slow progression.

While  anyone may develop glaucoma, if you have a first degree relative with glaucoma you have a 1 in 4 chance of developing glaucoma as well.

Glaucoma is a complex disease. Family history is vital and genetic testing is being developed as over 100 genes cause glaucoma.
Over 40 per cent of people have a first degree relative (parent, brother or sister) affected by glaucoma.
Many systemic and ocular conditions can be associated.

Glaucoma Australia promotes the risk awareness campaign for developing glaucoma to encourage regular eye testing.
Glaucoma is the leading cause of avoidable blindness in Australia, affecting over 300,000 Australians.
While nine out of 10 Australians say that sight is their most valued sense, over 8 million Australians are still not having regular eye tests though recommended.
Ideal glaucoma treatments include eye drops: 

  • Punctal occlusion should be carried out for a period of 3 minutes to prevent side effects. It can also be done by simply closing the eye or pushing the tear ducts located in the inner corner of the eyelids.
  • A drop size of a commercial eyedropper bottle can be as large as 50-75 microlitres and the conjunctival sac is capable on holding only 25-30 microlitres so some is lost within 30 seconds but total amount instilled disappearing within 10-20 min.

Your eye test for cataract

​Cataracts are a leading cause of blindness and treatment of cataracts is the most common eye surgery performed.  ​​
​​Common causes that can increase the risk,signs and symptoms  include:

Causes of cataracts include

  • Excessive exposure to UV to the lens of the eye
  • Omitting to wear  sunglasses which can prevent cataract. 
  • Smoking.
  • Obesity.
  • High blood pressure.
  • Previous eye injury or inflammation.
  • Previous eye surgery.
  • Protein clumping within the lens 

Signs and symptoms

  • ​Frequent changes in spectacle or contact lens prescription
  • Clouded, blurred,distorted or dull vision.
  • Poor contrast sensitivity.  
  • Increasing difficulty with vision at night
  • Sensitivity to light and glare
  • Need for brighter light for reading and other activities
  • Seeing “halos” around lights
  • Fading or yellowing of colors or colour deficiency.

Referral can be recommended for cataract surgery at the appropriate time for cataract removal. ​
Cataracts are very common in the long term with advancing age but can be present at birth or later as a result of  metabolic conditions, medications, exposure to radiation,electric shock, trauma, and ocular or systemic diseases. 
Such clouding of all or part of the lens may effect sight differently in bright light or dim light as the pupil will be a different size.

Congenital cataracts not withstanding a cataract is a clouding of the transparent tissue behind the iris that occurs in so called age related cataract. Types of cataracts are graded by density and location during eye examinations during the early stages to ensure the risk of cataracts and other eye conditions does not degrade vision.   A nuclear cataract forms deep in the central zone (nucleus) of the lens. Nuclear cataracts usually are associated with aging.  A subcapsular cataract occurs at the back of the lens often associated with diabetes or steroid medications. The cortical cataracts are  spoke like cataracts that tend to develop from the periphery of the lens towards the center. 

left eye-cataract
cataract human
Nuclear,Posterior sub capsule,Morgagnian,IOL, Pseudo exfoliation
Nuclear,Posterior sub capsule,Morgagnian,IOL, Pseudo exfoliation
Normal, Immature,Mature Hypermature,Cortical (vonuk 93485942)
Normal, Immature,Mature Hypermature,Cortical (vonuk 93485942)
Cataract removal surgery normally involves  replacing the cloudy lens  with an artificial intraocular lens (IOL). The natural lens is broken up by phacoemulsification where  the pieces are removed via a tiny incision  of the cornea . The IOL is then inserted through the incision and unfurls into the lens capsule.The incisions and cataract opening and division are performed usually by surgical laser.
The clear lens  protein of the eye can degrade  over time  often because of cumulative UV  causing a cataract. Animal studies are being used to test preventative medications so as not to increase the risk of cataract.

Your eye test for diabetes as advised by the Government Keepsight program

Early diagnosis and intervention can dramatically reduce vision loss.  Diabetes is the biggest challenge confronting Australia’s health system and is largely prevenable. It is projected to  afflict up to 10% of the population.

Type 1 diabetes is a serious, autoimmune condition in which the cells in the pancreas that produce insulin are destroyed. Type 1 diabetes can occur at any age.

Type 1 diabetes is not linked to lifestyle factors, it cannot be cured and it cannot be  prevented wheras Type 2 is associated with both genetic and modifiable lifestyle risk factors. 
Type 2 diabetes is a progressive condition in which the body becomes resistant to the normal effects of insulin and loses the capacity to produce enough insulin.
Gestational diabetes is a form of diabetes that can occurs just during pregnancy but increases a woman’s risk of developing type 2 diabetes in the future. 
We can enhance vision by supplementary glasses and electronic magnification and  timely referral for laser , injections or surgery.
DIABETES SYMPTOMS AND TREATMENT
diabetes diagnosis

Complete loss of vision can occur when scar tissue develops at the back of the eye. Through the Federal Government KeepSight program, all consumers registered with diabetes on the National Diabetes Services Scheme (NDSS), will be contacted specifically to have eye and vision monitoring as part of the overall diabetes management 

50% of people currently living with diabetes remain undiagnosed  despite the fact diabetes is a leading cause of serious health issues

Diabetic retinopathy is caused by damage to the blood vessels that nourish the retina.  Vision may  change accordingly.
Most people with type 1 diabetes and over 60% of people with type 2 diabetes will develop diabetic eye disease within 20 years of diagnosis. 
Some warning signs and recommendations for prevention are known.   Symptoms are not usually mild or absent in type 2 diabetes 
Type 2 diabetes is the most common form of diabetes and is diagnosed by blood glucose tests  ,wheras type 1 is  by blood glucose and auto autoantibody testing and urine tests for ketones.
 
Some people may not have any symptoms at all. In some cases, the first sign of diabetes may be a vision problem. We also use digital retinal photography and employ tests to measure the effect on vision
diabetes week
  • Healthy  diet including Omega 3s, fresh fruits and vegetables;
  • Take prescribed medication as directed;
  • Keep glycohemoglobin  (“A1c” or average blood sugar level) < 7%
  • Exercise regularly ,Control high blood pressure
  • Avoid alcohol and smoking.
  • Beware of slow healing wounds
  • Seek attention for numbness in feet and hands.
  • Sudden blurred or double vision
  • Fluctuations in  focusing 
  • Eye pain or pressure
  • A noticeable narrowing of vision
  • Visible dark spots in vision or flashing lights.
  • excessive  thirst and frequent urination 
  • lethargy
diabetes complications
  • Heart Attack,Stroke 
  • Peripheral Artery Disease
  • Diabetic Retinopathy
  • Cataracts
  • Glaucoma
  • Diabetic Foot
  • Diabetic Nephropathy (Kidney failure)
  • Peripheral Neuropathy (lower limb amputation)
  • Blindness
OCT scan | Ocular Coherence Tomography

Laser light from the red end of the visible spectrum (close to infra-red) is bounced  back in different directions and manifests as an ultra accurate map of the anatomical structures.

The Canon OCT has 3 μm optical axial resolution  70,000 A scan/second allowing for accurate 10 layer segmentation,comparison and progression. It is non invasive and non contact. ​

Courtesy Centre For Eye Health