The natural lens is located in the eye just behind the iris and the pupil. Light entering the eye
is focused by the lens onto the retina. When a cataract forms, the lens is no longer able to
focus the light clearly. Your vision becomes cloudy and an early cataract may cause few
problems with vision. If the cataract gets worse, sight may be partially or completely lost
until the
cataract is removed.
'THE RIGHT TO SIGHT' - The elimination of avoidable blindness
A global partnership between WHO and IAPB, the International Agency for Prevention of Blindness
aiming to eliminate avoidable blindness by the year 2020.
EVERY 5 SECONDS ONE PERSON IN OUR WORLD GOES BLIND
. . . . . . . . . . . . . . . . . . . AND A CHILD GOES BLIND EVERY MINUTE !
In the developing world, cataract blindness and poverty are often coincidental.  
The disability increases the risk of poverty as cataract blind are unable to earn a living and conditions of
poverty increase the probability of cataract blindness. Poor patients also are often unaware of treatment
options or have not enough money to pay for them.
Treatment
Certain medications can accelerate the development of cataracts. Sometimes, the cataract stops
developing in its early stages and vision is only slightly decreased, but if continues to develop,
vision is impaired and surgical treatment is required.
What is cataract ?
Cataract, the clouding of the normally clear, transparent natural crystalline lens of the eye,
is worldwide a leading cause of blindness. It is not a tumor or growth of new tissue over or
in the eye, but a fogging and loss of clarity of the natural crystalline lens.

CATARACT - A LEADING CAUSE OF BLINDNESS

The program through its member organizations facilitates the availability of affordable and high quality
cataract surgical services and supplies. In countries of Africa and Asia cataract accounts for at least
half of all blindness, despite the known technology that can restore vision at extremely low cost !
Reducing the backlog of cataract blindness mainly requires,


1
anatomy of the Eye
global
Trachoma 3.6% ▬
Glaucoma 12.3%
Onchocersiasis 0.8% ▬
( River Blindness )
▬ Other causes 13%  
Diabetic Retinopathi 4.8% ▬
▬ Childhood blindness 3.9%
▬ Non-trachomatous corneal opacity 5.1%
Age related      
Macular           AMD 8.7% ▬
Degeneration
18 million
retina
optic nerve
sclera
- lens
1

Cataract

1

Treatment

1

Worldwide

World Sight Day,
an annual day of awareness held on the second Thursday of October, which focuses attention
on the problem of global blindness and vision loss. World Sight Day is coordinated by IAPB, as part of
the WHO / IAPB 'The Right to Sight' initiative.
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Causes

Causes
Cataracts result from many conditions, the most frequent cause is the natural aging process. Other
causes may include eye trauma, chronic eye disease and other medical conditions such as diabetes.
Cataracts can take from a few months to several years to develop.
VISION
2 0 2 0
iris
pupil
cornea
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Poverty

Major causes of blindness worldwide ( 2006 )
wsd
VISION
2 0 2 0
UNIVERSAL EYE HEALTH: A Global Action Plan 2014–2019
( PDF - 436Kb )
pdf
Avoidable Blindness
IAPB

















































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Cataract is a leading cause of blindness
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WHO / IAPB

World Sight Day

Training ophthalmic personnel
Strengthening the existing health care infrastructure
Affordable pricing and availability of surgical supplies
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THE NEXT WORLD SIGHT DAY 2016 - Thursday 12 October 2017
IAPB
world sight day 2016
NO MORE AVOIDABLE BLINDNESS
- 80% of all visual impairment can be avoided or cured.
- About 284 million people are visually impaired worldwide: 39 million are blind and 246 have low vision.
- About 90% of the world's visually impaired people live in developing countries.
- Globally, uncorrected refractive errors are the main cause of visual impairment,
   but in middle and low-income countries, cataracts remain the leading cause.
- The number of people visually impaired from infectious diseases has greatly reduced in the last 20 years.